/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-60655ea [2020-09-15 01:18:27,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-15 01:18:27,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-15 01:18:27,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-15 01:18:27,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-15 01:18:27,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-15 01:18:27,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-15 01:18:27,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-15 01:18:27,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-15 01:18:27,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-15 01:18:27,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-15 01:18:27,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-15 01:18:27,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-15 01:18:27,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-15 01:18:27,426 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-15 01:18:27,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-15 01:18:27,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-15 01:18:27,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-15 01:18:27,433 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-15 01:18:27,443 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-15 01:18:27,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-15 01:18:27,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-15 01:18:27,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-15 01:18:27,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-15 01:18:27,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-15 01:18:27,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-15 01:18:27,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-15 01:18:27,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-15 01:18:27,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-15 01:18:27,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-15 01:18:27,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-15 01:18:27,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-15 01:18:27,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-15 01:18:27,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-15 01:18:27,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-15 01:18:27,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-15 01:18:27,481 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-09-15 01:18:27,529 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-15 01:18:27,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-15 01:18:27,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-15 01:18:27,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-15 01:18:27,532 INFO L138 SettingsManager]: * Use SBE=true [2020-09-15 01:18:27,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-15 01:18:27,532 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-15 01:18:27,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-15 01:18:27,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-15 01:18:27,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-15 01:18:27,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-15 01:18:27,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-15 01:18:27,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-15 01:18:27,535 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-15 01:18:27,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-15 01:18:27,535 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-15 01:18:27,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-15 01:18:27,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-15 01:18:27,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-15 01:18:27,536 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-15 01:18:27,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-15 01:18:27,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-15 01:18:27,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-15 01:18:27,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-15 01:18:27,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-15 01:18:27,537 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-15 01:18:27,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-15 01:18:27,538 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-15 01:18:27,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-15 01:18:28,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-15 01:18:28,103 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-15 01:18:28,108 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-15 01:18:28,110 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-15 01:18:28,111 INFO L275 PluginConnector]: CDTParser initialized [2020-09-15 01:18:28,112 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-09-15 01:18:28,228 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/485bc0d85/6046eb2578ae43cbb0999702d3003467/FLAGdb87ecbaa [2020-09-15 01:18:29,026 INFO L306 CDTParser]: Found 1 translation units. [2020-09-15 01:18:29,027 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-09-15 01:18:29,049 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/485bc0d85/6046eb2578ae43cbb0999702d3003467/FLAGdb87ecbaa [2020-09-15 01:18:29,174 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/485bc0d85/6046eb2578ae43cbb0999702d3003467 [2020-09-15 01:18:29,190 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-15 01:18:29,200 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-15 01:18:29,204 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-15 01:18:29,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-15 01:18:29,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-15 01:18:29,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 01:18:29" (1/1) ... [2020-09-15 01:18:29,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ca83958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:29, skipping insertion in model container [2020-09-15 01:18:29,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 01:18:29" (1/1) ... [2020-09-15 01:18:29,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-15 01:18:29,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-15 01:18:29,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 01:18:29,921 INFO L203 MainTranslator]: Completed pre-run [2020-09-15 01:18:29,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 01:18:30,061 INFO L208 MainTranslator]: Completed translation [2020-09-15 01:18:30,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:30 WrapperNode [2020-09-15 01:18:30,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-15 01:18:30,064 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-15 01:18:30,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-15 01:18:30,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-15 01:18:30,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:30" (1/1) ... [2020-09-15 01:18:30,098 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:30" (1/1) ... [2020-09-15 01:18:30,126 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-15 01:18:30,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-15 01:18:30,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-15 01:18:30,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-15 01:18:30,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:30" (1/1) ... [2020-09-15 01:18:30,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:30" (1/1) ... [2020-09-15 01:18:30,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:30" (1/1) ... [2020-09-15 01:18:30,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:30" (1/1) ... [2020-09-15 01:18:30,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:30" (1/1) ... [2020-09-15 01:18:30,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:30" (1/1) ... [2020-09-15 01:18:30,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:30" (1/1) ... [2020-09-15 01:18:30,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-15 01:18:30,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-15 01:18:30,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-15 01:18:30,169 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-15 01:18:30,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:30" (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 [2020-09-15 01:18:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-15 01:18:30,265 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-15 01:18:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-15 01:18:30,266 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-15 01:18:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-15 01:18:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-15 01:18:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-15 01:18:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-15 01:18:30,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-15 01:18:30,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-15 01:18:30,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-15 01:18:30,270 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-15 01:18:30,716 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-15 01:18:30,716 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-15 01:18:30,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 01:18:30 BoogieIcfgContainer [2020-09-15 01:18:30,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-15 01:18:30,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-15 01:18:30,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-15 01:18:30,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-15 01:18:30,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 01:18:29" (1/3) ... [2020-09-15 01:18:30,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c4fe6c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 01:18:30, skipping insertion in model container [2020-09-15 01:18:30,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:30" (2/3) ... [2020-09-15 01:18:30,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c4fe6c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 01:18:30, skipping insertion in model container [2020-09-15 01:18:30,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 01:18:30" (3/3) ... [2020-09-15 01:18:30,732 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2020-09-15 01:18:30,745 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-15 01:18:30,746 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-15 01:18:30,759 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-15 01:18:30,760 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-15 01:18:30,794 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,795 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,795 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,796 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,796 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,797 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,797 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,797 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,797 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,798 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,798 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,799 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,799 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,799 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,800 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,800 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,800 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,800 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,801 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,801 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,801 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,801 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,801 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,802 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,802 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,802 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,802 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,803 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,807 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,807 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,808 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,808 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,808 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,808 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,816 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,817 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,817 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,817 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,818 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,818 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:30,842 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-15 01:18:30,871 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-15 01:18:30,871 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-15 01:18:30,871 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-15 01:18:30,872 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-15 01:18:30,872 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-15 01:18:30,872 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-15 01:18:30,872 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-15 01:18:30,873 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-15 01:18:30,894 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-15 01:18:30,898 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-15 01:18:30,947 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-15 01:18:30,948 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-15 01:18:30,956 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. [2020-09-15 01:18:30,959 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-15 01:18:30,984 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-15 01:18:30,985 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-15 01:18:30,986 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. [2020-09-15 01:18:30,988 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-15 01:18:30,990 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-15 01:18:32,338 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-15 01:18:32,579 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-15 01:18:32,580 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-15 01:18:32,586 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-15 01:18:32,603 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-15 01:18:32,606 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-15 01:18:32,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-15 01:18:32,617 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:32,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-15 01:18:32,618 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:32,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:32,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-15 01:18:32,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:32,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396757598] [2020-09-15 01:18:32,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:32,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396757598] [2020-09-15 01:18:32,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:18:32,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-15 01:18:32,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457155366] [2020-09-15 01:18:32,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-15 01:18:32,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:32,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-15 01:18:32,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-15 01:18:32,966 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-15 01:18:33,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:33,099 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-15 01:18:33,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-15 01:18:33,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-15 01:18:33,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:33,121 INFO L225 Difference]: With dead ends: 75 [2020-09-15 01:18:33,121 INFO L226 Difference]: Without dead ends: 42 [2020-09-15 01:18:33,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-15 01:18:33,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-15 01:18:33,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-15 01:18:33,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 01:18:33,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-15 01:18:33,175 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-15 01:18:33,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:33,175 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-15 01:18:33,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-15 01:18:33,176 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-15 01:18:33,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-15 01:18:33,177 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:33,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:33,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-15 01:18:33,178 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:33,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:33,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-15 01:18:33,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:33,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589425447] [2020-09-15 01:18:33,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:33,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589425447] [2020-09-15 01:18:33,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:18:33,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 01:18:33,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73089103] [2020-09-15 01:18:33,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 01:18:33,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:33,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 01:18:33,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-15 01:18:33,365 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-15 01:18:33,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:33,421 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-15 01:18:33,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-15 01:18:33,422 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-15 01:18:33,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:33,424 INFO L225 Difference]: With dead ends: 56 [2020-09-15 01:18:33,424 INFO L226 Difference]: Without dead ends: 50 [2020-09-15 01:18:33,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-15 01:18:33,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-15 01:18:33,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-15 01:18:33,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 01:18:33,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-15 01:18:33,434 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-15 01:18:33,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:33,436 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-15 01:18:33,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 01:18:33,437 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-15 01:18:33,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:18:33,438 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:33,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:33,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-15 01:18:33,438 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:33,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:33,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-15 01:18:33,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:33,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691546599] [2020-09-15 01:18:33,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:33,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:33,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691546599] [2020-09-15 01:18:33,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:18:33,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-15 01:18:33,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414071721] [2020-09-15 01:18:33,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-15 01:18:33,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:33,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-15 01:18:33,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-15 01:18:33,572 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-09-15 01:18:33,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:33,667 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-15 01:18:33,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 01:18:33,668 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-15 01:18:33,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:33,670 INFO L225 Difference]: With dead ends: 78 [2020-09-15 01:18:33,670 INFO L226 Difference]: Without dead ends: 71 [2020-09-15 01:18:33,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:18:33,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-15 01:18:33,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-09-15 01:18:33,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 01:18:33,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-15 01:18:33,681 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-09-15 01:18:33,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:33,682 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-15 01:18:33,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-15 01:18:33,682 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-15 01:18:33,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:18:33,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:33,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:33,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-15 01:18:33,684 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:33,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:33,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-09-15 01:18:33,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:33,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378643652] [2020-09-15 01:18:33,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:33,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378643652] [2020-09-15 01:18:33,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:18:33,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-15 01:18:33,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277331265] [2020-09-15 01:18:33,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-15 01:18:33,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:33,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-15 01:18:33,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-15 01:18:33,792 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-09-15 01:18:33,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:33,888 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-15 01:18:33,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-15 01:18:33,889 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-15 01:18:33,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:33,890 INFO L225 Difference]: With dead ends: 54 [2020-09-15 01:18:33,890 INFO L226 Difference]: Without dead ends: 43 [2020-09-15 01:18:33,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:18:33,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-15 01:18:33,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-15 01:18:33,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-15 01:18:33,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-09-15 01:18:33,897 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-09-15 01:18:33,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:33,897 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-09-15 01:18:33,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-15 01:18:33,898 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-09-15 01:18:33,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:18:33,899 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:33,899 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:33,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-15 01:18:33,899 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:33,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:33,900 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-09-15 01:18:33,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:33,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985926515] [2020-09-15 01:18:33,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:33,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985926515] [2020-09-15 01:18:33,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:18:33,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-15 01:18:33,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789257146] [2020-09-15 01:18:33,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-15 01:18:33,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:33,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-15 01:18:33,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-15 01:18:33,994 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-09-15 01:18:34,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:34,086 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-09-15 01:18:34,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-15 01:18:34,087 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-15 01:18:34,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:34,088 INFO L225 Difference]: With dead ends: 57 [2020-09-15 01:18:34,088 INFO L226 Difference]: Without dead ends: 51 [2020-09-15 01:18:34,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:18:34,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-15 01:18:34,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-09-15 01:18:34,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-15 01:18:34,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-15 01:18:34,096 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-09-15 01:18:34,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:34,096 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-15 01:18:34,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-15 01:18:34,097 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-15 01:18:34,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:18:34,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:34,098 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:34,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-15 01:18:34,098 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:34,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:34,099 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-09-15 01:18:34,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:34,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196742252] [2020-09-15 01:18:34,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:34,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196742252] [2020-09-15 01:18:34,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530292879] [2020-09-15 01:18:34,210 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 [2020-09-15 01:18:34,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:18:34,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:34,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:18:34,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:34,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:18:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:34,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:34,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-15 01:18:34,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960929849] [2020-09-15 01:18:34,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 01:18:34,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:34,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 01:18:34,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-15 01:18:34,397 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-09-15 01:18:34,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:34,546 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-09-15 01:18:34,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 01:18:34,547 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-15 01:18:34,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:34,548 INFO L225 Difference]: With dead ends: 48 [2020-09-15 01:18:34,549 INFO L226 Difference]: Without dead ends: 43 [2020-09-15 01:18:34,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:18:34,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-15 01:18:34,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-15 01:18:34,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-15 01:18:34,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-15 01:18:34,555 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-09-15 01:18:34,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:34,556 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-15 01:18:34,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 01:18:34,556 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-15 01:18:34,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:18:34,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:34,557 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:34,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-15 01:18:34,759 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:34,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:34,759 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-09-15 01:18:34,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:34,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152672955] [2020-09-15 01:18:34,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:34,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:34,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152672955] [2020-09-15 01:18:34,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958123403] [2020-09-15 01:18:34,886 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 [2020-09-15 01:18:34,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:18:34,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:34,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:18:34,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:34,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:34,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-15 01:18:34,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895038418] [2020-09-15 01:18:34,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 01:18:34,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:34,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 01:18:34,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-15 01:18:34,984 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-09-15 01:18:35,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:35,068 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-15 01:18:35,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 01:18:35,069 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-15 01:18:35,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:35,070 INFO L225 Difference]: With dead ends: 54 [2020-09-15 01:18:35,070 INFO L226 Difference]: Without dead ends: 48 [2020-09-15 01:18:35,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:18:35,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-15 01:18:35,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-15 01:18:35,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 01:18:35,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-15 01:18:35,082 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-09-15 01:18:35,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:35,083 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-15 01:18:35,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 01:18:35,083 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-15 01:18:35,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:18:35,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:35,084 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:35,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:35,298 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:35,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:35,299 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-09-15 01:18:35,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:35,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683026588] [2020-09-15 01:18:35,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:35,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683026588] [2020-09-15 01:18:35,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108383397] [2020-09-15 01:18:35,394 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 [2020-09-15 01:18:35,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:18:35,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:35,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:18:35,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:35,481 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:35,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:35,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-15 01:18:35,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354668841] [2020-09-15 01:18:35,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 01:18:35,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:35,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 01:18:35,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-15 01:18:35,504 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-09-15 01:18:35,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:35,645 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-09-15 01:18:35,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 01:18:35,646 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-15 01:18:35,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:35,647 INFO L225 Difference]: With dead ends: 58 [2020-09-15 01:18:35,647 INFO L226 Difference]: Without dead ends: 52 [2020-09-15 01:18:35,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:18:35,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-15 01:18:35,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-15 01:18:35,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-15 01:18:35,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-15 01:18:35,653 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-09-15 01:18:35,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:35,654 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-15 01:18:35,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 01:18:35,654 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-15 01:18:35,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:18:35,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:35,655 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:35,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:35,870 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:35,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:35,871 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-09-15 01:18:35,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:35,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146566250] [2020-09-15 01:18:35,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:35,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146566250] [2020-09-15 01:18:35,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980187207] [2020-09-15 01:18:36,000 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 [2020-09-15 01:18:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:36,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:18:36,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:36,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:36,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-15 01:18:36,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154462941] [2020-09-15 01:18:36,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 01:18:36,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:36,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 01:18:36,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-15 01:18:36,103 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-09-15 01:18:36,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:36,259 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-15 01:18:36,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:18:36,259 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-15 01:18:36,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:36,261 INFO L225 Difference]: With dead ends: 78 [2020-09-15 01:18:36,261 INFO L226 Difference]: Without dead ends: 72 [2020-09-15 01:18:36,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:18:36,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-15 01:18:36,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-09-15 01:18:36,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 01:18:36,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-09-15 01:18:36,269 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-09-15 01:18:36,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:36,269 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-09-15 01:18:36,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 01:18:36,270 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-09-15 01:18:36,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:18:36,271 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:36,271 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:36,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:36,473 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:36,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:36,474 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-09-15 01:18:36,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:36,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991855672] [2020-09-15 01:18:36,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:36,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:36,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991855672] [2020-09-15 01:18:36,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444208865] [2020-09-15 01:18:36,548 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 [2020-09-15 01:18:36,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:18:36,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:36,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:18:36,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:36,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:36,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-15 01:18:36,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378469103] [2020-09-15 01:18:36,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 01:18:36,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:36,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 01:18:36,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-15 01:18:36,640 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-09-15 01:18:36,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:36,888 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-09-15 01:18:36,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:18:36,888 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-15 01:18:36,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:36,890 INFO L225 Difference]: With dead ends: 62 [2020-09-15 01:18:36,890 INFO L226 Difference]: Without dead ends: 54 [2020-09-15 01:18:36,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:18:36,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-15 01:18:36,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-09-15 01:18:36,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-15 01:18:36,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-09-15 01:18:36,896 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-09-15 01:18:36,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:36,896 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-09-15 01:18:36,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 01:18:36,897 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-09-15 01:18:36,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:18:36,897 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:36,898 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:37,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-15 01:18:37,111 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:37,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:37,112 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-09-15 01:18:37,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:37,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542837437] [2020-09-15 01:18:37,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:37,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542837437] [2020-09-15 01:18:37,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90725903] [2020-09-15 01:18:37,242 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 [2020-09-15 01:18:37,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:18:37,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:37,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:18:37,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:37,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:37,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-15 01:18:37,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011984405] [2020-09-15 01:18:37,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 01:18:37,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:37,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 01:18:37,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-15 01:18:37,348 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-09-15 01:18:37,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:37,497 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-09-15 01:18:37,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:18:37,498 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-15 01:18:37,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:37,499 INFO L225 Difference]: With dead ends: 64 [2020-09-15 01:18:37,499 INFO L226 Difference]: Without dead ends: 58 [2020-09-15 01:18:37,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:18:37,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-15 01:18:37,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-15 01:18:37,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-15 01:18:37,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-09-15 01:18:37,505 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-09-15 01:18:37,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:37,506 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-09-15 01:18:37,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 01:18:37,506 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-09-15 01:18:37,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:18:37,507 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:37,507 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:37,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:37,722 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:37,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:37,723 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-09-15 01:18:37,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:37,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210383139] [2020-09-15 01:18:37,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:37,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:37,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210383139] [2020-09-15 01:18:37,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379312380] [2020-09-15 01:18:37,820 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 [2020-09-15 01:18:37,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:18:37,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:37,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:18:37,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:37,907 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:37,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:37,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-15 01:18:37,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133992517] [2020-09-15 01:18:37,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:18:37,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:37,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:18:37,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:18:37,925 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-09-15 01:18:38,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:38,133 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-09-15 01:18:38,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:18:38,133 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-15 01:18:38,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:38,134 INFO L225 Difference]: With dead ends: 61 [2020-09-15 01:18:38,135 INFO L226 Difference]: Without dead ends: 55 [2020-09-15 01:18:38,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:18:38,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-15 01:18:38,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-09-15 01:18:38,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-15 01:18:38,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-15 01:18:38,141 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-09-15 01:18:38,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:38,141 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-15 01:18:38,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:18:38,142 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-15 01:18:38,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:18:38,142 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:38,143 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:38,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:38,358 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:38,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:38,358 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-09-15 01:18:38,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:38,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476624249] [2020-09-15 01:18:38,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:38,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:38,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476624249] [2020-09-15 01:18:38,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77994004] [2020-09-15 01:18:38,445 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 [2020-09-15 01:18:38,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:18:38,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:38,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:18:38,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:38,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:38,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-15 01:18:38,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676195899] [2020-09-15 01:18:38,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 01:18:38,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:38,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 01:18:38,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-15 01:18:38,537 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-09-15 01:18:38,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:38,717 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-15 01:18:38,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:18:38,718 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-15 01:18:38,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:38,719 INFO L225 Difference]: With dead ends: 77 [2020-09-15 01:18:38,719 INFO L226 Difference]: Without dead ends: 71 [2020-09-15 01:18:38,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:18:38,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-15 01:18:38,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-09-15 01:18:38,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-15 01:18:38,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-09-15 01:18:38,726 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-09-15 01:18:38,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:38,726 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-09-15 01:18:38,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 01:18:38,726 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-09-15 01:18:38,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:18:38,727 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:38,728 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:38,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-15 01:18:38,943 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:38,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:38,944 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-09-15 01:18:38,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:38,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150316504] [2020-09-15 01:18:38,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:39,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150316504] [2020-09-15 01:18:39,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205842971] [2020-09-15 01:18:39,033 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 [2020-09-15 01:18:39,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:18:39,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:39,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:18:39,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:39,159 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:39,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:39,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-15 01:18:39,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513248546] [2020-09-15 01:18:39,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:18:39,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:39,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:18:39,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:18:39,203 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-09-15 01:18:39,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:39,515 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-09-15 01:18:39,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:18:39,516 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-15 01:18:39,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:39,517 INFO L225 Difference]: With dead ends: 58 [2020-09-15 01:18:39,517 INFO L226 Difference]: Without dead ends: 50 [2020-09-15 01:18:39,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:18:39,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-15 01:18:39,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-09-15 01:18:39,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-15 01:18:39,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-09-15 01:18:39,529 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-09-15 01:18:39,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:39,529 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-09-15 01:18:39,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:18:39,531 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-09-15 01:18:39,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:18:39,532 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:39,536 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:39,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:39,750 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:39,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:39,751 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-09-15 01:18:39,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:39,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318773029] [2020-09-15 01:18:39,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:39,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:39,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318773029] [2020-09-15 01:18:39,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422631868] [2020-09-15 01:18:39,833 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 [2020-09-15 01:18:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:39,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:18:39,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:39,910 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:18:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:39,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:39,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-15 01:18:39,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181916323] [2020-09-15 01:18:39,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:18:39,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:39,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:18:39,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:18:39,925 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-09-15 01:18:40,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:40,168 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-09-15 01:18:40,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:18:40,169 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-15 01:18:40,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:40,170 INFO L225 Difference]: With dead ends: 60 [2020-09-15 01:18:40,170 INFO L226 Difference]: Without dead ends: 55 [2020-09-15 01:18:40,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:18:40,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-15 01:18:40,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-09-15 01:18:40,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 01:18:40,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-15 01:18:40,175 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-09-15 01:18:40,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:40,175 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-15 01:18:40,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:18:40,176 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-15 01:18:40,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:18:40,176 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:40,176 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:40,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-15 01:18:40,390 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:40,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:40,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-09-15 01:18:40,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:40,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694662321] [2020-09-15 01:18:40,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:40,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694662321] [2020-09-15 01:18:40,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477486453] [2020-09-15 01:18:40,500 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 [2020-09-15 01:18:40,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:18:40,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:40,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:18:40,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:40,582 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:18:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:40,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:40,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-15 01:18:40,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281267092] [2020-09-15 01:18:40,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:18:40,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:40,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:18:40,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:18:40,610 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-09-15 01:18:40,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:40,869 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-09-15 01:18:40,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:18:40,869 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 01:18:40,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:40,870 INFO L225 Difference]: With dead ends: 54 [2020-09-15 01:18:40,871 INFO L226 Difference]: Without dead ends: 49 [2020-09-15 01:18:40,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:40,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-15 01:18:40,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-15 01:18:40,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-15 01:18:40,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-15 01:18:40,875 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-09-15 01:18:40,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:40,876 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-15 01:18:40,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:18:40,876 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-15 01:18:40,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:18:40,877 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:40,877 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:41,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-15 01:18:41,089 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:41,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:41,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-09-15 01:18:41,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:41,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975655262] [2020-09-15 01:18:41,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:41,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975655262] [2020-09-15 01:18:41,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787538108] [2020-09-15 01:18:41,198 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 [2020-09-15 01:18:41,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:18:41,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:41,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:18:41,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:41,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:41,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-15 01:18:41,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322243052] [2020-09-15 01:18:41,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:18:41,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:41,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:18:41,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:18:41,272 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-09-15 01:18:41,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:41,438 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-09-15 01:18:41,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:18:41,439 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-15 01:18:41,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:41,440 INFO L225 Difference]: With dead ends: 60 [2020-09-15 01:18:41,440 INFO L226 Difference]: Without dead ends: 54 [2020-09-15 01:18:41,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:18:41,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-15 01:18:41,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-15 01:18:41,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 01:18:41,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-15 01:18:41,445 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-09-15 01:18:41,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:41,445 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-15 01:18:41,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:18:41,445 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-15 01:18:41,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:18:41,446 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:41,446 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:41,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-15 01:18:41,658 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:41,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:41,659 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-09-15 01:18:41,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:41,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195993615] [2020-09-15 01:18:41,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:41,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195993615] [2020-09-15 01:18:41,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896958995] [2020-09-15 01:18:41,761 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 [2020-09-15 01:18:41,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:18:41,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:41,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:18:41,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:41,831 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:41,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:41,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-15 01:18:41,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422777842] [2020-09-15 01:18:41,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:18:41,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:41,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:18:41,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:18:41,852 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-09-15 01:18:42,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:42,026 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-09-15 01:18:42,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:18:42,026 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 01:18:42,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:42,027 INFO L225 Difference]: With dead ends: 66 [2020-09-15 01:18:42,027 INFO L226 Difference]: Without dead ends: 60 [2020-09-15 01:18:42,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:18:42,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-15 01:18:42,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-09-15 01:18:42,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-15 01:18:42,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-15 01:18:42,031 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-09-15 01:18:42,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:42,031 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-15 01:18:42,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:18:42,031 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-15 01:18:42,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:18:42,034 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:42,034 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:42,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-15 01:18:42,242 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:42,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:42,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-09-15 01:18:42,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:42,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034354849] [2020-09-15 01:18:42,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:42,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034354849] [2020-09-15 01:18:42,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714009702] [2020-09-15 01:18:42,329 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 [2020-09-15 01:18:42,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:18:42,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:42,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:18:42,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:42,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:42,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-15 01:18:42,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410461265] [2020-09-15 01:18:42,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:18:42,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:42,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:18:42,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:18:42,404 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-09-15 01:18:42,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:42,608 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-09-15 01:18:42,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:18:42,608 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-15 01:18:42,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:42,610 INFO L225 Difference]: With dead ends: 67 [2020-09-15 01:18:42,610 INFO L226 Difference]: Without dead ends: 61 [2020-09-15 01:18:42,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:18:42,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-15 01:18:42,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-09-15 01:18:42,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-15 01:18:42,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-09-15 01:18:42,616 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-09-15 01:18:42,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:42,617 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-09-15 01:18:42,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:18:42,617 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-09-15 01:18:42,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:18:42,618 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:42,618 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:42,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:42,819 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:42,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:42,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-09-15 01:18:42,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:42,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337056259] [2020-09-15 01:18:42,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:42,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337056259] [2020-09-15 01:18:42,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020940805] [2020-09-15 01:18:42,906 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 [2020-09-15 01:18:42,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:18:42,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:42,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:18:42,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:42,974 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:42,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:42,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-15 01:18:42,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864514246] [2020-09-15 01:18:42,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:18:42,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:42,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:18:42,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:18:42,989 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-09-15 01:18:43,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:43,257 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-09-15 01:18:43,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:18:43,258 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 01:18:43,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:43,258 INFO L225 Difference]: With dead ends: 69 [2020-09-15 01:18:43,259 INFO L226 Difference]: Without dead ends: 63 [2020-09-15 01:18:43,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:43,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-15 01:18:43,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-15 01:18:43,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 01:18:43,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-15 01:18:43,262 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-09-15 01:18:43,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:43,262 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-15 01:18:43,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:18:43,263 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-15 01:18:43,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:18:43,263 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:43,263 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:43,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:43,472 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:43,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:43,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-09-15 01:18:43,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:43,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426853548] [2020-09-15 01:18:43,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:43,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426853548] [2020-09-15 01:18:43,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703476410] [2020-09-15 01:18:43,571 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 [2020-09-15 01:18:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:43,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:18:43,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:43,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:43,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-15 01:18:43,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307892042] [2020-09-15 01:18:43,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:18:43,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:43,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:18:43,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:18:43,656 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-09-15 01:18:43,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:43,939 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-15 01:18:43,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:18:43,945 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-15 01:18:43,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:43,946 INFO L225 Difference]: With dead ends: 88 [2020-09-15 01:18:43,946 INFO L226 Difference]: Without dead ends: 82 [2020-09-15 01:18:43,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:18:43,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-15 01:18:43,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-09-15 01:18:43,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-15 01:18:43,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-09-15 01:18:43,953 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-09-15 01:18:43,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:43,953 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-09-15 01:18:43,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:18:43,954 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-09-15 01:18:43,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:18:43,954 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:43,954 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:44,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:44,155 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:44,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:44,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-09-15 01:18:44,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:44,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409745624] [2020-09-15 01:18:44,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:44,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409745624] [2020-09-15 01:18:44,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724198869] [2020-09-15 01:18:44,234 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 [2020-09-15 01:18:44,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:18:44,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:44,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:18:44,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:44,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:44,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:44,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-15 01:18:44,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800730393] [2020-09-15 01:18:44,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:18:44,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:44,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:18:44,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:18:44,319 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-09-15 01:18:44,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:44,645 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-15 01:18:44,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:18:44,645 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 01:18:44,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:44,646 INFO L225 Difference]: With dead ends: 69 [2020-09-15 01:18:44,646 INFO L226 Difference]: Without dead ends: 61 [2020-09-15 01:18:44,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:18:44,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-15 01:18:44,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-09-15 01:18:44,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-15 01:18:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-09-15 01:18:44,651 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-09-15 01:18:44,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:44,652 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-09-15 01:18:44,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:18:44,652 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-09-15 01:18:44,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:18:44,652 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:44,653 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:44,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-15 01:18:44,864 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:44,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:44,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-09-15 01:18:44,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:44,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983905648] [2020-09-15 01:18:44,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:45,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983905648] [2020-09-15 01:18:45,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699310452] [2020-09-15 01:18:45,000 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 [2020-09-15 01:18:45,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:18:45,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:45,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:18:45,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:45,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:45,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-15 01:18:45,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462515055] [2020-09-15 01:18:45,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:18:45,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:45,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:18:45,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:18:45,094 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-09-15 01:18:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:45,260 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-15 01:18:45,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:18:45,261 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-15 01:18:45,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:45,262 INFO L225 Difference]: With dead ends: 74 [2020-09-15 01:18:45,262 INFO L226 Difference]: Without dead ends: 68 [2020-09-15 01:18:45,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:18:45,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-15 01:18:45,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-09-15 01:18:45,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-15 01:18:45,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-15 01:18:45,265 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-15 01:18:45,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:45,266 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-15 01:18:45,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:18:45,266 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-15 01:18:45,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:18:45,266 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:45,266 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:45,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-15 01:18:45,476 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:45,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:45,477 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-09-15 01:18:45,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:45,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298830445] [2020-09-15 01:18:45,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:45,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298830445] [2020-09-15 01:18:45,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115564601] [2020-09-15 01:18:45,582 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 [2020-09-15 01:18:45,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:18:45,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:45,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:18:45,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:45,665 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:45,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:45,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:45,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-15 01:18:45,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619253852] [2020-09-15 01:18:45,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:18:45,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:45,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:18:45,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:18:45,697 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-15 01:18:45,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:45,963 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-09-15 01:18:45,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:18:45,964 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 01:18:45,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:45,965 INFO L225 Difference]: With dead ends: 71 [2020-09-15 01:18:45,965 INFO L226 Difference]: Without dead ends: 65 [2020-09-15 01:18:45,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:18:45,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-15 01:18:45,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-09-15 01:18:45,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 01:18:45,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-15 01:18:45,969 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-15 01:18:45,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:45,970 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-15 01:18:45,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:18:45,970 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-15 01:18:45,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:18:45,971 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:45,971 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:46,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-15 01:18:46,172 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:46,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:46,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-09-15 01:18:46,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:46,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134859366] [2020-09-15 01:18:46,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:46,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:46,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134859366] [2020-09-15 01:18:46,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478481610] [2020-09-15 01:18:46,311 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 [2020-09-15 01:18:46,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:18:46,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:46,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:18:46,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:46,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:46,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-15 01:18:46,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875968809] [2020-09-15 01:18:46,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:18:46,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:46,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:18:46,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:18:46,394 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-15 01:18:46,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:46,596 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-09-15 01:18:46,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:18:46,597 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-15 01:18:46,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:46,598 INFO L225 Difference]: With dead ends: 68 [2020-09-15 01:18:46,599 INFO L226 Difference]: Without dead ends: 62 [2020-09-15 01:18:46,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:46,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-15 01:18:46,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-15 01:18:46,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-15 01:18:46,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-15 01:18:46,603 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-15 01:18:46,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:46,603 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-15 01:18:46,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:18:46,603 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-15 01:18:46,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:18:46,604 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:46,604 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:46,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-15 01:18:46,813 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:46,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:46,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-09-15 01:18:46,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:46,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712376108] [2020-09-15 01:18:46,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:46,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712376108] [2020-09-15 01:18:46,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846212651] [2020-09-15 01:18:46,908 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 [2020-09-15 01:18:46,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:18:46,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:46,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:18:46,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:47,013 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:47,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:47,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:47,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-15 01:18:47,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824067417] [2020-09-15 01:18:47,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:18:47,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:47,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:18:47,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:18:47,043 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-15 01:18:47,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:47,377 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-09-15 01:18:47,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:18:47,377 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 01:18:47,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:47,378 INFO L225 Difference]: With dead ends: 67 [2020-09-15 01:18:47,379 INFO L226 Difference]: Without dead ends: 61 [2020-09-15 01:18:47,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:18:47,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-15 01:18:47,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-09-15 01:18:47,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 01:18:47,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-15 01:18:47,384 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-15 01:18:47,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:47,385 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-15 01:18:47,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:18:47,385 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-15 01:18:47,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:18:47,385 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:47,385 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:47,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-15 01:18:47,586 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:47,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:47,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-09-15 01:18:47,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:47,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999875697] [2020-09-15 01:18:47,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:47,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:47,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999875697] [2020-09-15 01:18:47,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222417790] [2020-09-15 01:18:47,676 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 [2020-09-15 01:18:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:47,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:18:47,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:47,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:47,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-15 01:18:47,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58529173] [2020-09-15 01:18:47,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:18:47,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:47,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:18:47,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:18:47,743 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-15 01:18:48,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:48,029 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-15 01:18:48,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:18:48,030 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-15 01:18:48,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:48,031 INFO L225 Difference]: With dead ends: 83 [2020-09-15 01:18:48,031 INFO L226 Difference]: Without dead ends: 77 [2020-09-15 01:18:48,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:18:48,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-15 01:18:48,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-09-15 01:18:48,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-15 01:18:48,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-09-15 01:18:48,035 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-09-15 01:18:48,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:48,035 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-09-15 01:18:48,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:18:48,035 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-09-15 01:18:48,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:18:48,036 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:48,036 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:48,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:48,246 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:48,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:48,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-09-15 01:18:48,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:48,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381346314] [2020-09-15 01:18:48,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:48,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381346314] [2020-09-15 01:18:48,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917803234] [2020-09-15 01:18:48,337 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 [2020-09-15 01:18:48,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:18:48,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:48,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:18:48,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:48,443 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:48,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:48,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-15 01:18:48,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243140155] [2020-09-15 01:18:48,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:18:48,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:48,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:18:48,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:18:48,459 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-09-15 01:18:48,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:48,930 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-09-15 01:18:48,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:18:48,930 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 01:18:48,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:48,931 INFO L225 Difference]: With dead ends: 64 [2020-09-15 01:18:48,932 INFO L226 Difference]: Without dead ends: 56 [2020-09-15 01:18:48,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:18:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-15 01:18:48,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-09-15 01:18:48,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-15 01:18:48,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-09-15 01:18:48,935 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-09-15 01:18:48,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:48,935 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-09-15 01:18:48,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:18:48,936 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-09-15 01:18:48,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:18:48,936 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:48,936 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:49,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-15 01:18:49,137 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:49,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:49,138 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-09-15 01:18:49,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:49,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478837106] [2020-09-15 01:18:49,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:49,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478837106] [2020-09-15 01:18:49,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173275023] [2020-09-15 01:18:49,220 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 [2020-09-15 01:18:49,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:18:49,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:49,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:18:49,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:49,301 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:18:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:49,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:49,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-15 01:18:49,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803412973] [2020-09-15 01:18:49,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:18:49,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:49,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:18:49,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:18:49,319 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-09-15 01:18:49,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:49,658 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-09-15 01:18:49,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:18:49,658 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 01:18:49,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:49,659 INFO L225 Difference]: With dead ends: 68 [2020-09-15 01:18:49,659 INFO L226 Difference]: Without dead ends: 63 [2020-09-15 01:18:49,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:18:49,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-15 01:18:49,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-09-15 01:18:49,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-15 01:18:49,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-15 01:18:49,663 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-09-15 01:18:49,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:49,663 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-15 01:18:49,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:18:49,664 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-15 01:18:49,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:49,664 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:49,664 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:49,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-15 01:18:49,865 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:49,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:49,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-09-15 01:18:49,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:49,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514467409] [2020-09-15 01:18:49,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:49,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514467409] [2020-09-15 01:18:49,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238139518] [2020-09-15 01:18:49,957 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 [2020-09-15 01:18:50,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:18:50,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:50,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:18:50,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:50,065 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:18:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:50,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:50,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-15 01:18:50,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647342684] [2020-09-15 01:18:50,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:18:50,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:50,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:18:50,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:18:50,081 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-09-15 01:18:50,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:50,469 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-09-15 01:18:50,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:18:50,475 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 01:18:50,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:50,476 INFO L225 Difference]: With dead ends: 60 [2020-09-15 01:18:50,476 INFO L226 Difference]: Without dead ends: 55 [2020-09-15 01:18:50,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:18:50,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-15 01:18:50,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-15 01:18:50,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 01:18:50,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-15 01:18:50,479 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-09-15 01:18:50,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:50,480 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-15 01:18:50,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:18:50,481 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-15 01:18:50,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:50,481 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:50,481 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:50,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:50,691 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:50,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:50,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-09-15 01:18:50,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:50,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680918841] [2020-09-15 01:18:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:50,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680918841] [2020-09-15 01:18:50,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031404378] [2020-09-15 01:18:50,821 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 [2020-09-15 01:18:50,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 01:18:50,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:50,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:18:50,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:50,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:50,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 01:18:50,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645028552] [2020-09-15 01:18:50,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:18:50,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:50,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:18:50,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:18:50,900 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-09-15 01:18:51,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:51,070 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-09-15 01:18:51,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:18:51,070 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-15 01:18:51,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:51,071 INFO L225 Difference]: With dead ends: 66 [2020-09-15 01:18:51,071 INFO L226 Difference]: Without dead ends: 60 [2020-09-15 01:18:51,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:18:51,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-15 01:18:51,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-15 01:18:51,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 01:18:51,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-15 01:18:51,074 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-09-15 01:18:51,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:51,074 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-15 01:18:51,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:18:51,075 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-15 01:18:51,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:51,075 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:51,075 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:51,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:51,276 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:51,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:51,277 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-09-15 01:18:51,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:51,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007465128] [2020-09-15 01:18:51,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:51,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007465128] [2020-09-15 01:18:51,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777163893] [2020-09-15 01:18:51,470 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 [2020-09-15 01:18:51,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:18:51,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:51,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:18:51,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:51,574 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:51,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:51,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:51,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-15 01:18:51,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439601055] [2020-09-15 01:18:51,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:18:51,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:51,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:18:51,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:18:51,599 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-09-15 01:18:51,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:51,864 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-09-15 01:18:51,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:18:51,864 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 01:18:51,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:51,865 INFO L225 Difference]: With dead ends: 74 [2020-09-15 01:18:51,865 INFO L226 Difference]: Without dead ends: 68 [2020-09-15 01:18:51,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:18:51,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-15 01:18:51,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-15 01:18:51,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-15 01:18:51,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-09-15 01:18:51,869 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-09-15 01:18:51,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:51,869 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-09-15 01:18:51,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:18:51,870 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-09-15 01:18:51,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:51,870 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:51,870 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:52,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-15 01:18:52,078 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:52,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:52,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-09-15 01:18:52,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:52,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017970593] [2020-09-15 01:18:52,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:52,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017970593] [2020-09-15 01:18:52,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785881046] [2020-09-15 01:18:52,195 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 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 [2020-09-15 01:18:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:52,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:18:52,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:52,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:52,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 01:18:52,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957894609] [2020-09-15 01:18:52,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:18:52,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:52,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:18:52,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:18:52,266 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-09-15 01:18:52,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:52,532 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-09-15 01:18:52,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:18:52,533 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-15 01:18:52,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:52,534 INFO L225 Difference]: With dead ends: 75 [2020-09-15 01:18:52,534 INFO L226 Difference]: Without dead ends: 69 [2020-09-15 01:18:52,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:18:52,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-15 01:18:52,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-09-15 01:18:52,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-15 01:18:52,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-15 01:18:52,538 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-09-15 01:18:52,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:52,539 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-15 01:18:52,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:18:52,539 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-15 01:18:52,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:52,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:52,540 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:52,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:52,749 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:52,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:52,750 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-09-15 01:18:52,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:52,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522549769] [2020-09-15 01:18:52,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:52,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522549769] [2020-09-15 01:18:52,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729410318] [2020-09-15 01:18:52,862 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 [2020-09-15 01:18:52,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:18:52,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:52,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:18:52,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:52,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:52,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:52,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-15 01:18:52,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669684055] [2020-09-15 01:18:52,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:18:52,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:52,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:18:52,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:18:52,955 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-09-15 01:18:53,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:53,258 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-09-15 01:18:53,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:18:53,258 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 01:18:53,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:53,259 INFO L225 Difference]: With dead ends: 79 [2020-09-15 01:18:53,259 INFO L226 Difference]: Without dead ends: 73 [2020-09-15 01:18:53,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:18:53,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-15 01:18:53,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-09-15 01:18:53,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 01:18:53,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-15 01:18:53,263 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-09-15 01:18:53,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:53,263 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-15 01:18:53,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:18:53,263 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-15 01:18:53,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:53,264 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:53,264 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:53,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-15 01:18:53,465 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:53,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:53,466 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-09-15 01:18:53,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:53,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891648597] [2020-09-15 01:18:53,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:53,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891648597] [2020-09-15 01:18:53,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529279470] [2020-09-15 01:18:53,621 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 [2020-09-15 01:18:53,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-15 01:18:53,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:53,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:18:53,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:53,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:53,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 01:18:53,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172988293] [2020-09-15 01:18:53,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:18:53,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:53,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:18:53,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:18:53,746 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-09-15 01:18:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:54,135 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-09-15 01:18:54,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:18:54,135 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-15 01:18:54,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:54,136 INFO L225 Difference]: With dead ends: 79 [2020-09-15 01:18:54,137 INFO L226 Difference]: Without dead ends: 73 [2020-09-15 01:18:54,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:18:54,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-15 01:18:54,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-09-15 01:18:54,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-15 01:18:54,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-09-15 01:18:54,142 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-09-15 01:18:54,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:54,142 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-09-15 01:18:54,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:18:54,143 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-09-15 01:18:54,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:54,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:54,144 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:54,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:54,355 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:54,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:54,356 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-09-15 01:18:54,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:54,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58749434] [2020-09-15 01:18:54,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:54,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58749434] [2020-09-15 01:18:54,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943480966] [2020-09-15 01:18:54,502 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 [2020-09-15 01:18:54,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:18:54,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:54,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:18:54,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:54,581 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:54,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:54,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:54,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-15 01:18:54,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110093866] [2020-09-15 01:18:54,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:18:54,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:54,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:18:54,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:18:54,606 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-09-15 01:18:55,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:55,004 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-09-15 01:18:55,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:18:55,004 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 01:18:55,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:55,005 INFO L225 Difference]: With dead ends: 76 [2020-09-15 01:18:55,006 INFO L226 Difference]: Without dead ends: 70 [2020-09-15 01:18:55,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:18:55,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-15 01:18:55,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-09-15 01:18:55,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-15 01:18:55,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-15 01:18:55,010 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-09-15 01:18:55,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:55,010 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-15 01:18:55,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:18:55,011 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-15 01:18:55,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:55,011 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:55,011 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:55,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-15 01:18:55,221 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:55,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:55,222 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-09-15 01:18:55,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:55,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089596520] [2020-09-15 01:18:55,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:55,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089596520] [2020-09-15 01:18:55,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594403180] [2020-09-15 01:18:55,318 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 [2020-09-15 01:18:55,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 01:18:55,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:55,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:18:55,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:55,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:55,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 01:18:55,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962058646] [2020-09-15 01:18:55,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:18:55,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:55,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:18:55,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:18:55,398 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-09-15 01:18:55,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:55,747 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-09-15 01:18:55,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:18:55,748 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-15 01:18:55,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:55,749 INFO L225 Difference]: With dead ends: 96 [2020-09-15 01:18:55,749 INFO L226 Difference]: Without dead ends: 90 [2020-09-15 01:18:55,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:18:55,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-15 01:18:55,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-09-15 01:18:55,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 01:18:55,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-09-15 01:18:55,755 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-09-15 01:18:55,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:55,755 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-09-15 01:18:55,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:18:55,756 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-09-15 01:18:55,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:55,756 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:55,757 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:55,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-15 01:18:55,970 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:55,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:55,971 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-09-15 01:18:55,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:55,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930159576] [2020-09-15 01:18:55,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:56,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930159576] [2020-09-15 01:18:56,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743192853] [2020-09-15 01:18:56,067 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 [2020-09-15 01:18:56,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:18:56,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:56,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:56,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:56,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:56,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-15 01:18:56,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041397090] [2020-09-15 01:18:56,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:18:56,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:56,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:18:56,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:18:56,200 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-09-15 01:18:56,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:56,656 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-09-15 01:18:56,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:18:56,657 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 01:18:56,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:56,658 INFO L225 Difference]: With dead ends: 77 [2020-09-15 01:18:56,658 INFO L226 Difference]: Without dead ends: 69 [2020-09-15 01:18:56,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:18:56,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-15 01:18:56,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-15 01:18:56,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-15 01:18:56,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-09-15 01:18:56,662 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-09-15 01:18:56,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:56,663 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-09-15 01:18:56,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:18:56,663 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-09-15 01:18:56,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:18:56,664 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:56,664 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:56,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-15 01:18:56,874 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:56,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:56,875 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-09-15 01:18:56,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:56,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503857735] [2020-09-15 01:18:56,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:56,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503857735] [2020-09-15 01:18:56,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107323186] [2020-09-15 01:18:56,989 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 [2020-09-15 01:18:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:57,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:57,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:57,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:57,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 01:18:57,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653323239] [2020-09-15 01:18:57,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:18:57,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:57,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:18:57,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:18:57,068 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-09-15 01:18:57,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:57,273 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-15 01:18:57,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:18:57,274 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-15 01:18:57,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:57,275 INFO L225 Difference]: With dead ends: 84 [2020-09-15 01:18:57,275 INFO L226 Difference]: Without dead ends: 78 [2020-09-15 01:18:57,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:18:57,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-15 01:18:57,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-15 01:18:57,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-15 01:18:57,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-15 01:18:57,279 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-15 01:18:57,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:57,279 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-15 01:18:57,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:18:57,279 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-15 01:18:57,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:18:57,280 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:57,280 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:57,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-15 01:18:57,488 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:57,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:57,489 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-09-15 01:18:57,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:57,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826329446] [2020-09-15 01:18:57,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:57,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826329446] [2020-09-15 01:18:57,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214397873] [2020-09-15 01:18:57,616 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 [2020-09-15 01:18:57,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:18:57,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:57,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:57,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:57,692 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:57,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:57,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-15 01:18:57,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757028623] [2020-09-15 01:18:57,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:18:57,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:57,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:18:57,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:18:57,712 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-15 01:18:57,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:57,983 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-15 01:18:57,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:18:57,984 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 01:18:57,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:57,985 INFO L225 Difference]: With dead ends: 81 [2020-09-15 01:18:57,985 INFO L226 Difference]: Without dead ends: 75 [2020-09-15 01:18:57,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:18:57,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-15 01:18:57,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-09-15 01:18:57,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-15 01:18:57,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-15 01:18:57,989 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-15 01:18:57,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:57,989 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-15 01:18:57,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:18:57,989 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-15 01:18:57,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:18:57,990 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:57,990 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:58,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-15 01:18:58,197 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:58,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:58,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-09-15 01:18:58,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:58,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558616168] [2020-09-15 01:18:58,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:58,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:58,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558616168] [2020-09-15 01:18:58,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102199272] [2020-09-15 01:18:58,310 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 [2020-09-15 01:18:58,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-15 01:18:58,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:58,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:58,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:58,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:58,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:58,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 01:18:58,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690253494] [2020-09-15 01:18:58,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:18:58,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:58,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:18:58,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:18:58,392 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-15 01:18:58,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:58,656 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-15 01:18:58,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:18:58,657 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-15 01:18:58,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:58,658 INFO L225 Difference]: With dead ends: 78 [2020-09-15 01:18:58,658 INFO L226 Difference]: Without dead ends: 72 [2020-09-15 01:18:58,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:18:58,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-15 01:18:58,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-09-15 01:18:58,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-15 01:18:58,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-15 01:18:58,661 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-15 01:18:58,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:58,662 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-15 01:18:58,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:18:58,662 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-15 01:18:58,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:18:58,662 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:58,662 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:58,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-15 01:18:58,868 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:58,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:58,869 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-09-15 01:18:58,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:58,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253733886] [2020-09-15 01:18:58,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:58,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:58,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253733886] [2020-09-15 01:18:58,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353030678] [2020-09-15 01:18:58,995 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 [2020-09-15 01:18:59,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:18:59,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:59,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:59,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:59,072 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:59,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:59,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:59,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-15 01:18:59,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353700000] [2020-09-15 01:18:59,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:18:59,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:59,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:18:59,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:18:59,085 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-15 01:18:59,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:59,496 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-15 01:18:59,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:18:59,497 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 01:18:59,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:59,497 INFO L225 Difference]: With dead ends: 77 [2020-09-15 01:18:59,498 INFO L226 Difference]: Without dead ends: 71 [2020-09-15 01:18:59,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:18:59,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-15 01:18:59,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-09-15 01:18:59,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-15 01:18:59,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-15 01:18:59,501 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-15 01:18:59,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:59,501 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-15 01:18:59,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:18:59,501 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-15 01:18:59,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:18:59,502 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:59,502 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:59,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-15 01:18:59,709 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:59,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:59,710 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-09-15 01:18:59,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:59,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020188185] [2020-09-15 01:18:59,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:59,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:59,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020188185] [2020-09-15 01:18:59,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152933189] [2020-09-15 01:18:59,824 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 [2020-09-15 01:18:59,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 01:18:59,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:59,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:59,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:59,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:59,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 01:18:59,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899320753] [2020-09-15 01:18:59,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:18:59,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:59,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:18:59,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:18:59,908 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-15 01:19:00,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:00,258 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-09-15 01:19:00,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:19:00,258 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-15 01:19:00,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:00,259 INFO L225 Difference]: With dead ends: 74 [2020-09-15 01:19:00,259 INFO L226 Difference]: Without dead ends: 68 [2020-09-15 01:19:00,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:19:00,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-15 01:19:00,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-09-15 01:19:00,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-15 01:19:00,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-15 01:19:00,262 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-15 01:19:00,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:00,262 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-15 01:19:00,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:19:00,263 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-15 01:19:00,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:19:00,263 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:00,263 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:00,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:00,472 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:00,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:00,473 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-09-15 01:19:00,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:00,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661670828] [2020-09-15 01:19:00,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:00,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661670828] [2020-09-15 01:19:00,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132495326] [2020-09-15 01:19:00,594 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 [2020-09-15 01:19:00,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:19:00,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:00,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:19:00,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:00,681 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:00,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:00,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-15 01:19:00,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679748450] [2020-09-15 01:19:00,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:19:00,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:00,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:19:00,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:19:00,696 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-15 01:19:01,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:01,163 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-09-15 01:19:01,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:19:01,163 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 01:19:01,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:01,164 INFO L225 Difference]: With dead ends: 73 [2020-09-15 01:19:01,165 INFO L226 Difference]: Without dead ends: 67 [2020-09-15 01:19:01,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:19:01,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-15 01:19:01,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-09-15 01:19:01,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-15 01:19:01,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-15 01:19:01,169 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-15 01:19:01,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:01,169 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-15 01:19:01,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:19:01,169 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-15 01:19:01,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:19:01,170 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:01,170 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:01,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-15 01:19:01,379 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:01,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:01,380 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-09-15 01:19:01,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:01,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624650428] [2020-09-15 01:19:01,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:01,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624650428] [2020-09-15 01:19:01,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757477200] [2020-09-15 01:19:01,488 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 [2020-09-15 01:19:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:01,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:19:01,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:01,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:01,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 01:19:01,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774235254] [2020-09-15 01:19:01,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:19:01,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:01,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:19:01,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:19:01,556 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-15 01:19:01,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:01,948 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-15 01:19:01,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:19:01,949 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-15 01:19:01,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:01,950 INFO L225 Difference]: With dead ends: 89 [2020-09-15 01:19:01,951 INFO L226 Difference]: Without dead ends: 83 [2020-09-15 01:19:01,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:19:01,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-15 01:19:01,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-15 01:19:01,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-15 01:19:01,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-09-15 01:19:01,955 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-09-15 01:19:01,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:01,955 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-09-15 01:19:01,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:19:01,955 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-09-15 01:19:01,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:19:01,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:01,956 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:02,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:02,165 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:02,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:02,166 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-09-15 01:19:02,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:02,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861534992] [2020-09-15 01:19:02,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:02,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:02,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861534992] [2020-09-15 01:19:02,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547738399] [2020-09-15 01:19:02,272 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 [2020-09-15 01:19:02,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:19:02,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:02,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:19:02,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:02,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:02,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-15 01:19:02,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373806999] [2020-09-15 01:19:02,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:19:02,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:02,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:19:02,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:19:02,400 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-09-15 01:19:02,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:02,835 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-09-15 01:19:02,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:19:02,835 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 01:19:02,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:02,836 INFO L225 Difference]: With dead ends: 68 [2020-09-15 01:19:02,836 INFO L226 Difference]: Without dead ends: 60 [2020-09-15 01:19:02,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:19:02,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-15 01:19:02,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-09-15 01:19:02,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-15 01:19:02,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-09-15 01:19:02,841 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-09-15 01:19:02,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:02,841 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-09-15 01:19:02,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:19:02,842 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-09-15 01:19:02,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:19:02,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:02,842 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:03,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-15 01:19:03,052 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:03,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:03,053 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-09-15 01:19:03,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:03,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361703771] [2020-09-15 01:19:03,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:03,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361703771] [2020-09-15 01:19:03,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361740387] [2020-09-15 01:19:03,154 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 [2020-09-15 01:19:03,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-15 01:19:03,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:03,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:19:03,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:03,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:19:03,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:03,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:03,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-15 01:19:03,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134759086] [2020-09-15 01:19:03,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:19:03,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:03,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:19:03,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:19:03,240 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-09-15 01:19:03,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:03,703 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-09-15 01:19:03,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:19:03,703 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 01:19:03,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:03,704 INFO L225 Difference]: With dead ends: 76 [2020-09-15 01:19:03,704 INFO L226 Difference]: Without dead ends: 71 [2020-09-15 01:19:03,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:19:03,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-15 01:19:03,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-09-15 01:19:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 01:19:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-15 01:19:03,707 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-09-15 01:19:03,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:03,708 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-15 01:19:03,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:19:03,708 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-15 01:19:03,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:19:03,708 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:03,709 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:03,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:03,918 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:03,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:03,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-09-15 01:19:03,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:03,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977969355] [2020-09-15 01:19:03,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:04,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977969355] [2020-09-15 01:19:04,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803307112] [2020-09-15 01:19:04,028 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 [2020-09-15 01:19:04,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:19:04,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:04,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:19:04,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:04,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:19:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:04,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:04,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 01:19:04,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913842909] [2020-09-15 01:19:04,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:19:04,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:04,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:19:04,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:19:04,155 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-09-15 01:19:04,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:04,627 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-09-15 01:19:04,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:19:04,628 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 01:19:04,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:04,629 INFO L225 Difference]: With dead ends: 66 [2020-09-15 01:19:04,629 INFO L226 Difference]: Without dead ends: 61 [2020-09-15 01:19:04,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:19:04,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-15 01:19:04,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-09-15 01:19:04,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 01:19:04,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-15 01:19:04,634 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-09-15 01:19:04,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:04,634 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-15 01:19:04,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:19:04,634 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-15 01:19:04,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:19:04,635 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:04,635 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:04,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-15 01:19:04,842 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:04,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:04,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-09-15 01:19:04,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:04,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251791765] [2020-09-15 01:19:04,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:05,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251791765] [2020-09-15 01:19:05,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133876826] [2020-09-15 01:19:05,003 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 [2020-09-15 01:19:05,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-15 01:19:05,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:05,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:19:05,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:05,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:05,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:05,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 01:19:05,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692310296] [2020-09-15 01:19:05,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:19:05,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:05,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:19:05,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:19:05,074 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-09-15 01:19:05,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:05,302 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-09-15 01:19:05,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:19:05,302 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-15 01:19:05,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:05,303 INFO L225 Difference]: With dead ends: 72 [2020-09-15 01:19:05,303 INFO L226 Difference]: Without dead ends: 66 [2020-09-15 01:19:05,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:19:05,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-15 01:19:05,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-15 01:19:05,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-15 01:19:05,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-15 01:19:05,308 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-09-15 01:19:05,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:05,308 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-15 01:19:05,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:19:05,308 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-15 01:19:05,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:19:05,309 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:05,309 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:05,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-15 01:19:05,518 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:05,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:05,519 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-09-15 01:19:05,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:05,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649264241] [2020-09-15 01:19:05,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:05,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649264241] [2020-09-15 01:19:05,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285016898] [2020-09-15 01:19:05,661 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 [2020-09-15 01:19:05,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-15 01:19:05,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:05,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:19:05,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:05,763 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:05,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:05,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 01:19:05,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072844592] [2020-09-15 01:19:05,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:19:05,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:05,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:19:05,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:19:05,778 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-09-15 01:19:06,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:06,073 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-09-15 01:19:06,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:19:06,073 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 01:19:06,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:06,074 INFO L225 Difference]: With dead ends: 82 [2020-09-15 01:19:06,074 INFO L226 Difference]: Without dead ends: 76 [2020-09-15 01:19:06,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:19:06,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-15 01:19:06,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-15 01:19:06,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-15 01:19:06,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-09-15 01:19:06,078 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-09-15 01:19:06,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:06,078 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-09-15 01:19:06,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:19:06,078 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-09-15 01:19:06,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:19:06,079 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:06,079 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:06,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-15 01:19:06,289 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:06,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:06,290 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-09-15 01:19:06,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:06,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425201811] [2020-09-15 01:19:06,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:06,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425201811] [2020-09-15 01:19:06,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719844639] [2020-09-15 01:19:06,438 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 [2020-09-15 01:19:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:06,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:19:06,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:06,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:06,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 01:19:06,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994155917] [2020-09-15 01:19:06,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:19:06,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:06,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:19:06,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:19:06,532 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-09-15 01:19:06,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:06,810 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-09-15 01:19:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:19:06,811 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-15 01:19:06,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:06,812 INFO L225 Difference]: With dead ends: 83 [2020-09-15 01:19:06,812 INFO L226 Difference]: Without dead ends: 77 [2020-09-15 01:19:06,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:19:06,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-15 01:19:06,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-09-15 01:19:06,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-15 01:19:06,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-09-15 01:19:06,816 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-09-15 01:19:06,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:06,817 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-09-15 01:19:06,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:19:06,817 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-09-15 01:19:06,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:19:06,818 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:06,818 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:07,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-15 01:19:07,022 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:07,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:07,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-09-15 01:19:07,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:07,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782791071] [2020-09-15 01:19:07,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:07,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782791071] [2020-09-15 01:19:07,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665966536] [2020-09-15 01:19:07,160 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 [2020-09-15 01:19:07,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:19:07,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:07,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:19:07,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:07,247 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:07,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:07,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 01:19:07,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49063702] [2020-09-15 01:19:07,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:19:07,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:07,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:19:07,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:19:07,265 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-09-15 01:19:07,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:07,603 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-09-15 01:19:07,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:19:07,604 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 01:19:07,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:07,605 INFO L225 Difference]: With dead ends: 89 [2020-09-15 01:19:07,606 INFO L226 Difference]: Without dead ends: 83 [2020-09-15 01:19:07,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:19:07,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-15 01:19:07,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-09-15 01:19:07,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-15 01:19:07,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-09-15 01:19:07,613 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-09-15 01:19:07,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:07,613 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-09-15 01:19:07,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:19:07,613 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-09-15 01:19:07,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:19:07,614 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:07,614 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:07,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:07,823 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:07,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:07,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-09-15 01:19:07,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:07,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682790511] [2020-09-15 01:19:07,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:07,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682790511] [2020-09-15 01:19:07,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202366123] [2020-09-15 01:19:07,958 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 [2020-09-15 01:19:08,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-15 01:19:08,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:08,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:19:08,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:08,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:08,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 01:19:08,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729497112] [2020-09-15 01:19:08,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:19:08,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:08,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:19:08,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:19:08,033 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-09-15 01:19:08,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:08,403 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-09-15 01:19:08,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:19:08,404 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-15 01:19:08,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:08,405 INFO L225 Difference]: With dead ends: 89 [2020-09-15 01:19:08,405 INFO L226 Difference]: Without dead ends: 83 [2020-09-15 01:19:08,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:19:08,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-15 01:19:08,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-09-15 01:19:08,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-15 01:19:08,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-15 01:19:08,409 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-09-15 01:19:08,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:08,409 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-15 01:19:08,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:19:08,409 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-15 01:19:08,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:19:08,410 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:08,410 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:08,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:08,618 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:08,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:08,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-09-15 01:19:08,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:08,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845528736] [2020-09-15 01:19:08,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:08,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845528736] [2020-09-15 01:19:08,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902844500] [2020-09-15 01:19:08,763 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 [2020-09-15 01:19:08,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:19:08,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:08,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:19:08,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:08,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:08,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:08,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 01:19:08,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540310059] [2020-09-15 01:19:08,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:19:08,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:08,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:19:08,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:19:08,862 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-09-15 01:19:09,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:09,334 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-09-15 01:19:09,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:19:09,335 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 01:19:09,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:09,336 INFO L225 Difference]: With dead ends: 86 [2020-09-15 01:19:09,336 INFO L226 Difference]: Without dead ends: 80 [2020-09-15 01:19:09,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:19:09,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-15 01:19:09,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-09-15 01:19:09,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-15 01:19:09,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-15 01:19:09,340 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-09-15 01:19:09,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:09,340 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-15 01:19:09,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:19:09,340 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-15 01:19:09,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:19:09,341 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:09,341 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:09,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-15 01:19:09,549 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:09,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:09,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-09-15 01:19:09,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:09,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037201075] [2020-09-15 01:19:09,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:09,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:09,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037201075] [2020-09-15 01:19:09,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976481069] [2020-09-15 01:19:09,662 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 [2020-09-15 01:19:09,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-15 01:19:09,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:09,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:19:09,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:09,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:09,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 01:19:09,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935310253] [2020-09-15 01:19:09,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:19:09,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:09,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:19:09,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:19:09,742 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-09-15 01:19:10,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:10,137 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-09-15 01:19:10,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:19:10,138 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-15 01:19:10,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:10,139 INFO L225 Difference]: With dead ends: 87 [2020-09-15 01:19:10,139 INFO L226 Difference]: Without dead ends: 81 [2020-09-15 01:19:10,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:19:10,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-15 01:19:10,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-09-15 01:19:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-15 01:19:10,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-09-15 01:19:10,142 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-09-15 01:19:10,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:10,143 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-09-15 01:19:10,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:19:10,143 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-09-15 01:19:10,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:19:10,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:10,143 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:10,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:10,344 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:10,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:10,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-09-15 01:19:10,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:10,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989801973] [2020-09-15 01:19:10,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:10,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:10,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989801973] [2020-09-15 01:19:10,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678404384] [2020-09-15 01:19:10,474 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 [2020-09-15 01:19:10,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-15 01:19:10,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:10,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:19:10,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:10,552 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:10,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:10,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:10,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 01:19:10,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169830500] [2020-09-15 01:19:10,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:19:10,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:10,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:19:10,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:19:10,567 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-09-15 01:19:11,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:11,094 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-09-15 01:19:11,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:19:11,095 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 01:19:11,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:11,096 INFO L225 Difference]: With dead ends: 84 [2020-09-15 01:19:11,096 INFO L226 Difference]: Without dead ends: 78 [2020-09-15 01:19:11,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:19:11,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-15 01:19:11,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-09-15 01:19:11,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 01:19:11,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-15 01:19:11,098 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-09-15 01:19:11,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:11,099 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-15 01:19:11,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:19:11,099 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-15 01:19:11,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:19:11,099 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:11,100 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:11,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-15 01:19:11,308 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:11,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:11,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-09-15 01:19:11,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:11,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966193151] [2020-09-15 01:19:11,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:11,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:11,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966193151] [2020-09-15 01:19:11,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498249106] [2020-09-15 01:19:11,427 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 [2020-09-15 01:19:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:11,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:19:11,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:11,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:11,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 01:19:11,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104180006] [2020-09-15 01:19:11,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:19:11,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:11,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:19:11,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:19:11,503 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-09-15 01:19:11,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:11,961 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-15 01:19:11,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:19:11,962 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-15 01:19:11,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:11,963 INFO L225 Difference]: With dead ends: 104 [2020-09-15 01:19:11,963 INFO L226 Difference]: Without dead ends: 98 [2020-09-15 01:19:11,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-09-15 01:19:11,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-15 01:19:11,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-09-15 01:19:11,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-15 01:19:11,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-09-15 01:19:11,966 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-09-15 01:19:11,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:11,966 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-09-15 01:19:11,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:19:11,966 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-09-15 01:19:11,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:19:11,967 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:11,967 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:12,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-15 01:19:12,177 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:12,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:12,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-09-15 01:19:12,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:12,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124021607] [2020-09-15 01:19:12,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:12,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124021607] [2020-09-15 01:19:12,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534912435] [2020-09-15 01:19:12,307 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 [2020-09-15 01:19:12,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:19:12,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:12,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:19:12,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:12,387 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:12,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:12,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 01:19:12,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045765326] [2020-09-15 01:19:12,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:19:12,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:12,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:19:12,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:19:12,402 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-09-15 01:19:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:12,988 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-09-15 01:19:12,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:19:12,989 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 01:19:12,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:12,990 INFO L225 Difference]: With dead ends: 85 [2020-09-15 01:19:12,990 INFO L226 Difference]: Without dead ends: 77 [2020-09-15 01:19:12,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:19:12,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-15 01:19:12,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-09-15 01:19:12,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-15 01:19:12,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-09-15 01:19:12,993 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-09-15 01:19:12,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:12,994 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-09-15 01:19:12,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:19:12,994 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-09-15 01:19:12,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:19:12,995 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:12,995 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:13,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-15 01:19:13,204 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:13,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-09-15 01:19:13,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:13,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282474383] [2020-09-15 01:19:13,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:13,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282474383] [2020-09-15 01:19:13,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120579448] [2020-09-15 01:19:13,369 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 [2020-09-15 01:19:13,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-15 01:19:13,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:13,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:19:13,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:13,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:13,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 01:19:13,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524265612] [2020-09-15 01:19:13,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:19:13,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:13,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:19:13,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:19:13,443 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-09-15 01:19:13,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:13,707 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-15 01:19:13,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:19:13,708 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-15 01:19:13,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:13,709 INFO L225 Difference]: With dead ends: 94 [2020-09-15 01:19:13,709 INFO L226 Difference]: Without dead ends: 88 [2020-09-15 01:19:13,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:19:13,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-15 01:19:13,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-09-15 01:19:13,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 01:19:13,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-15 01:19:13,712 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-15 01:19:13,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:13,712 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-15 01:19:13,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:19:13,712 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-15 01:19:13,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:19:13,713 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:13,713 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:13,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-15 01:19:13,922 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:13,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:13,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-09-15 01:19:13,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:13,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406661942] [2020-09-15 01:19:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:14,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:14,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406661942] [2020-09-15 01:19:14,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7621867] [2020-09-15 01:19:14,078 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 [2020-09-15 01:19:14,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:19:14,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:14,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:19:14,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:14,150 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:14,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:14,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 01:19:14,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681130891] [2020-09-15 01:19:14,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:19:14,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:14,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:19:14,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:19:14,164 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-15 01:19:14,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:14,535 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-09-15 01:19:14,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:19:14,535 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 01:19:14,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:14,536 INFO L225 Difference]: With dead ends: 91 [2020-09-15 01:19:14,536 INFO L226 Difference]: Without dead ends: 85 [2020-09-15 01:19:14,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:19:14,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-15 01:19:14,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-15 01:19:14,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:19:14,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-15 01:19:14,540 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-15 01:19:14,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:14,540 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-15 01:19:14,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:19:14,540 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-15 01:19:14,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:19:14,541 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:14,541 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:14,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-15 01:19:14,750 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:14,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:14,751 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-09-15 01:19:14,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:14,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349214223] [2020-09-15 01:19:14,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:14,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349214223] [2020-09-15 01:19:14,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119026567] [2020-09-15 01:19:14,922 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 [2020-09-15 01:19:14,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-15 01:19:14,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:14,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:19:14,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:14,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:14,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 01:19:14,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401486644] [2020-09-15 01:19:14,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:19:14,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:14,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:19:14,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:19:14,998 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-15 01:19:15,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:15,336 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-15 01:19:15,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:19:15,337 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-15 01:19:15,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:15,338 INFO L225 Difference]: With dead ends: 88 [2020-09-15 01:19:15,338 INFO L226 Difference]: Without dead ends: 82 [2020-09-15 01:19:15,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:19:15,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-15 01:19:15,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-09-15 01:19:15,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 01:19:15,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-15 01:19:15,341 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-15 01:19:15,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:15,341 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-15 01:19:15,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:19:15,342 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-15 01:19:15,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:19:15,342 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:15,342 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:15,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:15,543 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:15,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:15,543 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-09-15 01:19:15,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:15,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536647064] [2020-09-15 01:19:15,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:15,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536647064] [2020-09-15 01:19:15,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595731415] [2020-09-15 01:19:15,688 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 [2020-09-15 01:19:15,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-15 01:19:15,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:15,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:19:15,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:15,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:15,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:15,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 01:19:15,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121799421] [2020-09-15 01:19:15,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:19:15,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:15,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:19:15,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:19:15,781 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-15 01:19:16,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:16,234 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-09-15 01:19:16,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:19:16,234 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 01:19:16,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:16,235 INFO L225 Difference]: With dead ends: 87 [2020-09-15 01:19:16,235 INFO L226 Difference]: Without dead ends: 81 [2020-09-15 01:19:16,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:19:16,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-15 01:19:16,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-09-15 01:19:16,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:19:16,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-15 01:19:16,239 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-15 01:19:16,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:16,239 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-15 01:19:16,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:19:16,239 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-15 01:19:16,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:19:16,240 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:16,240 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:16,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:16,445 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:16,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:16,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-09-15 01:19:16,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:16,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774477654] [2020-09-15 01:19:16,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:16,571 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:16,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774477654] [2020-09-15 01:19:16,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657363012] [2020-09-15 01:19:16,572 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 [2020-09-15 01:19:16,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:16,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:19:16,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:16,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:16,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 01:19:16,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227261108] [2020-09-15 01:19:16,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:19:16,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:16,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:19:16,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:19:16,640 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-15 01:19:17,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:17,012 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-15 01:19:17,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:19:17,013 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-15 01:19:17,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:17,014 INFO L225 Difference]: With dead ends: 84 [2020-09-15 01:19:17,014 INFO L226 Difference]: Without dead ends: 78 [2020-09-15 01:19:17,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:19:17,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-15 01:19:17,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-09-15 01:19:17,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 01:19:17,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-15 01:19:17,017 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-15 01:19:17,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:17,017 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-15 01:19:17,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:19:17,018 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-15 01:19:17,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:19:17,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:17,018 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:17,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-09-15 01:19:17,220 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:17,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:17,221 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-09-15 01:19:17,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:17,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127716809] [2020-09-15 01:19:17,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:17,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127716809] [2020-09-15 01:19:17,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341614720] [2020-09-15 01:19:17,376 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 [2020-09-15 01:19:17,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:19:17,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:17,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:19:17,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:17,443 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:17,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:17,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 01:19:17,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597830691] [2020-09-15 01:19:17,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:19:17,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:17,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:19:17,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:19:17,463 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-15 01:19:18,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:18,004 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-15 01:19:18,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:19:18,005 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 01:19:18,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:18,006 INFO L225 Difference]: With dead ends: 83 [2020-09-15 01:19:18,006 INFO L226 Difference]: Without dead ends: 77 [2020-09-15 01:19:18,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-15 01:19:18,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-15 01:19:18,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-09-15 01:19:18,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:19:18,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-15 01:19:18,009 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-15 01:19:18,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:18,009 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-15 01:19:18,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:19:18,009 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-15 01:19:18,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:19:18,010 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:18,010 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:18,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:18,211 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:18,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:18,212 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-09-15 01:19:18,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:18,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220308921] [2020-09-15 01:19:18,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:18,363 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:18,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220308921] [2020-09-15 01:19:18,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222856001] [2020-09-15 01:19:18,364 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 [2020-09-15 01:19:18,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-15 01:19:18,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:18,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:19:18,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:18,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:18,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 01:19:18,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661066415] [2020-09-15 01:19:18,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:19:18,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:18,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:19:18,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:19:18,448 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-15 01:19:18,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:18,924 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-09-15 01:19:18,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:19:18,925 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-15 01:19:18,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:18,925 INFO L225 Difference]: With dead ends: 80 [2020-09-15 01:19:18,926 INFO L226 Difference]: Without dead ends: 74 [2020-09-15 01:19:18,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:19:18,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-15 01:19:18,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-09-15 01:19:18,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 01:19:18,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-15 01:19:18,929 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-15 01:19:18,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:18,929 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-15 01:19:18,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:19:18,929 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-15 01:19:18,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:19:18,929 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:18,929 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:19,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-15 01:19:19,130 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:19,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:19,131 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-09-15 01:19:19,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:19,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571484193] [2020-09-15 01:19:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:19,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571484193] [2020-09-15 01:19:19,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47480653] [2020-09-15 01:19:19,282 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 [2020-09-15 01:19:19,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:19:19,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:19,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:19:19,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:19,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:19,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:19,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 01:19:19,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792669567] [2020-09-15 01:19:19,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:19:19,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:19,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:19:19,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:19:19,382 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-15 01:19:20,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:20,021 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-09-15 01:19:20,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:19:20,021 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 01:19:20,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:20,022 INFO L225 Difference]: With dead ends: 79 [2020-09-15 01:19:20,023 INFO L226 Difference]: Without dead ends: 73 [2020-09-15 01:19:20,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:19:20,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-15 01:19:20,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-09-15 01:19:20,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:19:20,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-15 01:19:20,025 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-15 01:19:20,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:20,026 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-15 01:19:20,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:19:20,026 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-15 01:19:20,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:19:20,026 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:20,026 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:20,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:20,228 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:20,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:20,229 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-09-15 01:19:20,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:20,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227327665] [2020-09-15 01:19:20,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:20,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227327665] [2020-09-15 01:19:20,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326122261] [2020-09-15 01:19:20,362 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 [2020-09-15 01:19:20,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-15 01:19:20,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:20,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:19:20,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:20,439 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:20,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:20,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 01:19:20,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753171362] [2020-09-15 01:19:20,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:19:20,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:20,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:19:20,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:19:20,441 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-15 01:19:20,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:20,960 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-15 01:19:20,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:19:20,961 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-15 01:19:20,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:20,962 INFO L225 Difference]: With dead ends: 95 [2020-09-15 01:19:20,962 INFO L226 Difference]: Without dead ends: 89 [2020-09-15 01:19:20,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:19:20,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-15 01:19:20,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-09-15 01:19:20,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-15 01:19:20,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-09-15 01:19:20,965 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-09-15 01:19:20,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:20,965 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-09-15 01:19:20,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:19:20,965 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-09-15 01:19:20,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:19:20,966 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:20,966 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:21,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-15 01:19:21,167 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:21,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:21,167 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-09-15 01:19:21,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:21,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691484164] [2020-09-15 01:19:21,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:21,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691484164] [2020-09-15 01:19:21,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753323326] [2020-09-15 01:19:21,313 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 [2020-09-15 01:19:21,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-15 01:19:21,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:21,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:19:21,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:21,390 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:21,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:21,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 01:19:21,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805262050] [2020-09-15 01:19:21,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:19:21,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:21,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:19:21,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:19:21,408 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-09-15 01:19:22,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:22,086 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-09-15 01:19:22,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:19:22,087 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 01:19:22,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:22,088 INFO L225 Difference]: With dead ends: 76 [2020-09-15 01:19:22,088 INFO L226 Difference]: Without dead ends: 68 [2020-09-15 01:19:22,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:19:22,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-15 01:19:22,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-09-15 01:19:22,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-15 01:19:22,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-09-15 01:19:22,091 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-09-15 01:19:22,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:22,091 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-09-15 01:19:22,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:19:22,092 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-09-15 01:19:22,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:19:22,092 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:22,092 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:22,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:22,293 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:22,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:22,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-09-15 01:19:22,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:22,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644150222] [2020-09-15 01:19:22,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:22,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644150222] [2020-09-15 01:19:22,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866074332] [2020-09-15 01:19:22,409 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 [2020-09-15 01:19:22,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:22,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:19:22,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:22,499 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:19:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:22,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:22,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 01:19:22,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203705796] [2020-09-15 01:19:22,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:19:22,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:22,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:19:22,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:19:22,516 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-09-15 01:19:23,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:23,129 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-09-15 01:19:23,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:19:23,130 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 01:19:23,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:23,131 INFO L225 Difference]: With dead ends: 84 [2020-09-15 01:19:23,131 INFO L226 Difference]: Without dead ends: 79 [2020-09-15 01:19:23,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:19:23,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-15 01:19:23,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-09-15 01:19:23,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-15 01:19:23,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-15 01:19:23,133 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-09-15 01:19:23,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:23,133 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-15 01:19:23,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:19:23,133 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-15 01:19:23,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:23,133 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:23,134 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:23,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-15 01:19:23,335 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:23,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:23,336 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-09-15 01:19:23,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:23,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551261063] [2020-09-15 01:19:23,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:23,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551261063] [2020-09-15 01:19:23,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848074344] [2020-09-15 01:19:23,489 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 [2020-09-15 01:19:23,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:19:23,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:23,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:23,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:23,572 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:19:23,589 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:23,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:23,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 01:19:23,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873936571] [2020-09-15 01:19:23,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:23,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:23,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:23,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:23,591 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-09-15 01:19:24,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:24,287 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-09-15 01:19:24,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:19:24,288 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 01:19:24,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:24,289 INFO L225 Difference]: With dead ends: 72 [2020-09-15 01:19:24,289 INFO L226 Difference]: Without dead ends: 67 [2020-09-15 01:19:24,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:19:24,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-15 01:19:24,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-09-15 01:19:24,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 01:19:24,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-15 01:19:24,293 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-09-15 01:19:24,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:24,293 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-15 01:19:24,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:24,293 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-15 01:19:24,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:24,294 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:24,294 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:24,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-15 01:19:24,502 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:24,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:24,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-09-15 01:19:24,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:24,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145914637] [2020-09-15 01:19:24,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:24,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145914637] [2020-09-15 01:19:24,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030160633] [2020-09-15 01:19:24,708 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 [2020-09-15 01:19:24,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-15 01:19:24,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:24,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:24,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:24,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:24,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-15 01:19:24,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163538661] [2020-09-15 01:19:24,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:19:24,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:24,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:19:24,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:19:24,781 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-09-15 01:19:25,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:25,067 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-09-15 01:19:25,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:19:25,068 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-15 01:19:25,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:25,069 INFO L225 Difference]: With dead ends: 78 [2020-09-15 01:19:25,069 INFO L226 Difference]: Without dead ends: 72 [2020-09-15 01:19:25,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:19:25,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-15 01:19:25,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-09-15 01:19:25,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 01:19:25,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-09-15 01:19:25,073 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-09-15 01:19:25,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:25,073 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-09-15 01:19:25,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:19:25,073 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-09-15 01:19:25,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:25,073 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:25,074 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:25,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:25,275 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:25,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:25,275 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-09-15 01:19:25,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:25,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437307326] [2020-09-15 01:19:25,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:25,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437307326] [2020-09-15 01:19:25,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984342708] [2020-09-15 01:19:25,494 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 [2020-09-15 01:19:25,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:19:25,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:25,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:25,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:25,572 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:25,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:25,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 01:19:25,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112471092] [2020-09-15 01:19:25,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:25,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:25,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:25,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:25,586 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-09-15 01:19:25,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:25,948 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-09-15 01:19:25,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:19:25,949 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 01:19:25,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:25,950 INFO L225 Difference]: With dead ends: 90 [2020-09-15 01:19:25,950 INFO L226 Difference]: Without dead ends: 84 [2020-09-15 01:19:25,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:19:25,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-15 01:19:25,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-09-15 01:19:25,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-15 01:19:25,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-09-15 01:19:25,953 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-09-15 01:19:25,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:25,954 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-09-15 01:19:25,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:25,954 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-09-15 01:19:25,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:25,954 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:25,955 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:26,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:26,162 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:26,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:26,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-09-15 01:19:26,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:26,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890426201] [2020-09-15 01:19:26,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:26,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890426201] [2020-09-15 01:19:26,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121357785] [2020-09-15 01:19:26,350 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 [2020-09-15 01:19:26,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-15 01:19:26,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:26,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:26,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:26,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:26,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-15 01:19:26,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010924666] [2020-09-15 01:19:26,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:19:26,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:26,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:19:26,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:19:26,425 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-09-15 01:19:26,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:26,824 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-09-15 01:19:26,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:19:26,825 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-15 01:19:26,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:26,826 INFO L225 Difference]: With dead ends: 91 [2020-09-15 01:19:26,826 INFO L226 Difference]: Without dead ends: 85 [2020-09-15 01:19:26,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:19:26,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-15 01:19:26,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-09-15 01:19:26,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-15 01:19:26,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-09-15 01:19:26,828 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-09-15 01:19:26,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:26,828 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-09-15 01:19:26,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:19:26,828 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-09-15 01:19:26,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:26,829 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:26,829 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:27,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:27,030 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:27,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:27,030 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-09-15 01:19:27,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:27,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675490364] [2020-09-15 01:19:27,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:27,210 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:27,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675490364] [2020-09-15 01:19:27,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762369280] [2020-09-15 01:19:27,211 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 [2020-09-15 01:19:27,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-15 01:19:27,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:27,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:27,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:27,284 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:27,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:27,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 01:19:27,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497003117] [2020-09-15 01:19:27,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:27,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:27,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:27,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:27,297 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-09-15 01:19:27,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:27,734 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-09-15 01:19:27,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:19:27,735 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 01:19:27,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:27,736 INFO L225 Difference]: With dead ends: 99 [2020-09-15 01:19:27,736 INFO L226 Difference]: Without dead ends: 93 [2020-09-15 01:19:27,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:19:27,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-15 01:19:27,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-09-15 01:19:27,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 01:19:27,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-09-15 01:19:27,739 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-09-15 01:19:27,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:27,739 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-09-15 01:19:27,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:27,739 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-09-15 01:19:27,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:27,740 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:27,740 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:27,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:27,941 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:27,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:27,941 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-09-15 01:19:27,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:27,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422388775] [2020-09-15 01:19:27,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:28,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422388775] [2020-09-15 01:19:28,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329856733] [2020-09-15 01:19:28,136 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 [2020-09-15 01:19:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:28,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:28,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:28,213 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:28,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:28,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-15 01:19:28,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463609450] [2020-09-15 01:19:28,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:19:28,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:28,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:19:28,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:19:28,215 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-09-15 01:19:28,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:28,683 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-15 01:19:28,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:19:28,684 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-15 01:19:28,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:28,684 INFO L225 Difference]: With dead ends: 99 [2020-09-15 01:19:28,685 INFO L226 Difference]: Without dead ends: 93 [2020-09-15 01:19:28,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-15 01:19:28,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-15 01:19:28,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-09-15 01:19:28,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-15 01:19:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-09-15 01:19:28,687 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-09-15 01:19:28,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:28,687 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-09-15 01:19:28,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:19:28,687 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-09-15 01:19:28,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:28,688 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:28,688 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:28,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-09-15 01:19:28,889 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:28,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:28,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-09-15 01:19:28,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:28,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625578664] [2020-09-15 01:19:28,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:29,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625578664] [2020-09-15 01:19:29,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249178677] [2020-09-15 01:19:29,061 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 [2020-09-15 01:19:29,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:19:29,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:29,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:29,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:29,140 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:29,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:29,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 01:19:29,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362816790] [2020-09-15 01:19:29,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:29,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:29,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:29,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:29,154 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-09-15 01:19:29,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:29,688 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-09-15 01:19:29,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:19:29,689 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 01:19:29,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:29,690 INFO L225 Difference]: With dead ends: 96 [2020-09-15 01:19:29,690 INFO L226 Difference]: Without dead ends: 90 [2020-09-15 01:19:29,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:19:29,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-15 01:19:29,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-09-15 01:19:29,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-15 01:19:29,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-09-15 01:19:29,693 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-09-15 01:19:29,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:29,693 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-09-15 01:19:29,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:29,693 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-09-15 01:19:29,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:29,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:29,694 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:29,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:29,894 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:29,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:29,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-09-15 01:19:29,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:29,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924477708] [2020-09-15 01:19:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:30,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924477708] [2020-09-15 01:19:30,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45874557] [2020-09-15 01:19:30,037 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 [2020-09-15 01:19:30,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-15 01:19:30,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:30,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:30,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:30,114 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:30,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:30,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-15 01:19:30,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659719117] [2020-09-15 01:19:30,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:19:30,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:30,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:19:30,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:19:30,116 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-09-15 01:19:30,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:30,624 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-09-15 01:19:30,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:19:30,624 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-15 01:19:30,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:30,625 INFO L225 Difference]: With dead ends: 97 [2020-09-15 01:19:30,626 INFO L226 Difference]: Without dead ends: 91 [2020-09-15 01:19:30,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:19:30,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-15 01:19:30,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-09-15 01:19:30,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 01:19:30,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-15 01:19:30,629 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-09-15 01:19:30,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:30,630 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-15 01:19:30,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:19:30,630 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-15 01:19:30,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:30,630 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:30,630 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:30,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-15 01:19:30,836 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:30,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:30,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-09-15 01:19:30,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:30,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559773965] [2020-09-15 01:19:30,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:30,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559773965] [2020-09-15 01:19:30,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392258058] [2020-09-15 01:19:30,991 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 [2020-09-15 01:19:31,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:19:31,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:31,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:31,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:31,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:31,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:31,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 01:19:31,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949567827] [2020-09-15 01:19:31,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:31,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:31,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:31,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:31,123 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-09-15 01:19:31,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:31,842 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-15 01:19:31,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:19:31,843 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 01:19:31,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:31,844 INFO L225 Difference]: With dead ends: 94 [2020-09-15 01:19:31,845 INFO L226 Difference]: Without dead ends: 88 [2020-09-15 01:19:31,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 01:19:31,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-15 01:19:31,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-09-15 01:19:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:19:31,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-15 01:19:31,849 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-09-15 01:19:31,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:31,849 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-15 01:19:31,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:31,850 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-15 01:19:31,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:31,850 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:31,851 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:32,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:32,062 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:32,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:32,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-09-15 01:19:32,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:32,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613990817] [2020-09-15 01:19:32,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:32,206 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:32,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613990817] [2020-09-15 01:19:32,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039227114] [2020-09-15 01:19:32,207 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 [2020-09-15 01:19:32,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-15 01:19:32,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:32,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:32,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:32,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:32,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-15 01:19:32,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639105418] [2020-09-15 01:19:32,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:19:32,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:32,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:19:32,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:19:32,298 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-09-15 01:19:32,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:32,863 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-09-15 01:19:32,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:19:32,864 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-15 01:19:32,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:32,865 INFO L225 Difference]: With dead ends: 95 [2020-09-15 01:19:32,865 INFO L226 Difference]: Without dead ends: 89 [2020-09-15 01:19:32,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:19:32,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-15 01:19:32,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-09-15 01:19:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-15 01:19:32,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-09-15 01:19:32,868 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-09-15 01:19:32,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:32,868 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-09-15 01:19:32,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:19:32,868 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-09-15 01:19:32,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:32,869 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:32,869 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:33,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-15 01:19:33,072 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:33,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:33,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-09-15 01:19:33,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:33,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869319650] [2020-09-15 01:19:33,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:33,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869319650] [2020-09-15 01:19:33,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298227050] [2020-09-15 01:19:33,239 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 [2020-09-15 01:19:33,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-15 01:19:33,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:33,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:33,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:33,327 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:33,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:33,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 01:19:33,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778178685] [2020-09-15 01:19:33,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:33,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:33,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:33,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:33,358 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-09-15 01:19:34,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:34,041 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-09-15 01:19:34,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:19:34,042 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 01:19:34,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:34,043 INFO L225 Difference]: With dead ends: 92 [2020-09-15 01:19:34,043 INFO L226 Difference]: Without dead ends: 86 [2020-09-15 01:19:34,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:19:34,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-15 01:19:34,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-09-15 01:19:34,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-15 01:19:34,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-15 01:19:34,046 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-09-15 01:19:34,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:34,046 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-15 01:19:34,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:34,047 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-15 01:19:34,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:34,047 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:34,047 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:34,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:34,255 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:34,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:34,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-09-15 01:19:34,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:34,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321436358] [2020-09-15 01:19:34,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:34,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321436358] [2020-09-15 01:19:34,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599754031] [2020-09-15 01:19:34,407 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 [2020-09-15 01:19:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:34,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:34,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:34,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:34,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-15 01:19:34,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017667930] [2020-09-15 01:19:34,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:19:34,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:34,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:19:34,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:19:34,488 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-09-15 01:19:35,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:35,100 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-09-15 01:19:35,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:19:35,101 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-15 01:19:35,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:35,102 INFO L225 Difference]: With dead ends: 112 [2020-09-15 01:19:35,102 INFO L226 Difference]: Without dead ends: 106 [2020-09-15 01:19:35,103 INFO L675 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 [2020-09-15 01:19:35,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-15 01:19:35,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-09-15 01:19:35,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 01:19:35,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-09-15 01:19:35,105 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-09-15 01:19:35,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:35,105 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-09-15 01:19:35,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:19:35,105 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-09-15 01:19:35,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:35,106 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:35,106 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:35,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:35,307 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:35,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:35,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-09-15 01:19:35,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:35,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600192969] [2020-09-15 01:19:35,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:35,439 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:35,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600192969] [2020-09-15 01:19:35,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194267716] [2020-09-15 01:19:35,440 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 [2020-09-15 01:19:35,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:19:35,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:35,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:35,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:35,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:35,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 01:19:35,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890037903] [2020-09-15 01:19:35,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:35,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:35,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:35,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:35,562 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-09-15 01:19:36,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:36,228 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-09-15 01:19:36,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:19:36,229 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 01:19:36,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:36,230 INFO L225 Difference]: With dead ends: 93 [2020-09-15 01:19:36,230 INFO L226 Difference]: Without dead ends: 85 [2020-09-15 01:19:36,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:19:36,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-15 01:19:36,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-09-15 01:19:36,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-15 01:19:36,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-09-15 01:19:36,232 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-09-15 01:19:36,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:36,233 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-09-15 01:19:36,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:36,233 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-09-15 01:19:36,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:36,233 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:36,233 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:36,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:36,440 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:36,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:36,441 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-09-15 01:19:36,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:36,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947498042] [2020-09-15 01:19:36,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:36,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947498042] [2020-09-15 01:19:36,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709290712] [2020-09-15 01:19:36,653 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 [2020-09-15 01:19:36,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-15 01:19:36,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:36,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:36,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:36,726 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:36,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:36,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-15 01:19:36,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340929750] [2020-09-15 01:19:36,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:36,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:36,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:36,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:36,727 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-09-15 01:19:37,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:37,060 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-09-15 01:19:37,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:19:37,061 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-15 01:19:37,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:37,062 INFO L225 Difference]: With dead ends: 104 [2020-09-15 01:19:37,062 INFO L226 Difference]: Without dead ends: 98 [2020-09-15 01:19:37,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:19:37,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-15 01:19:37,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-09-15 01:19:37,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 01:19:37,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-15 01:19:37,064 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-15 01:19:37,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:37,064 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-15 01:19:37,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:37,064 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-15 01:19:37,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:37,065 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:37,065 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:37,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:37,266 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:37,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:37,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-09-15 01:19:37,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:37,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134694500] [2020-09-15 01:19:37,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:37,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134694500] [2020-09-15 01:19:37,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013148612] [2020-09-15 01:19:37,472 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 [2020-09-15 01:19:37,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:19:37,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:37,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:37,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:37,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:37,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:37,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-15 01:19:37,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303529031] [2020-09-15 01:19:37,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:19:37,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:37,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:19:37,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:19:37,567 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-15 01:19:38,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:38,026 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-09-15 01:19:38,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:19:38,026 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 01:19:38,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:38,027 INFO L225 Difference]: With dead ends: 101 [2020-09-15 01:19:38,028 INFO L226 Difference]: Without dead ends: 95 [2020-09-15 01:19:38,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-09-15 01:19:38,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-15 01:19:38,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-09-15 01:19:38,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 01:19:38,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-15 01:19:38,030 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-15 01:19:38,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:38,030 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-15 01:19:38,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:19:38,031 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-15 01:19:38,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:38,031 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:38,031 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:38,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:38,235 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:38,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:38,236 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-09-15 01:19:38,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:38,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494404845] [2020-09-15 01:19:38,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:38,446 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:38,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494404845] [2020-09-15 01:19:38,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44210576] [2020-09-15 01:19:38,447 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 [2020-09-15 01:19:38,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-15 01:19:38,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:38,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:38,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:38,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:38,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-15 01:19:38,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874787423] [2020-09-15 01:19:38,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:38,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:38,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:38,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:38,524 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-15 01:19:38,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:38,946 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-09-15 01:19:38,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:19:38,946 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-15 01:19:38,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:38,947 INFO L225 Difference]: With dead ends: 98 [2020-09-15 01:19:38,947 INFO L226 Difference]: Without dead ends: 92 [2020-09-15 01:19:38,948 INFO L675 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 [2020-09-15 01:19:38,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-15 01:19:38,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-09-15 01:19:38,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 01:19:38,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-15 01:19:38,950 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-15 01:19:38,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:38,951 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-15 01:19:38,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:38,951 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-15 01:19:38,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:38,951 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:38,952 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:39,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:39,160 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:39,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:39,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-09-15 01:19:39,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:39,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167900989] [2020-09-15 01:19:39,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:39,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167900989] [2020-09-15 01:19:39,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470029865] [2020-09-15 01:19:39,382 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 [2020-09-15 01:19:39,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-15 01:19:39,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:39,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:39,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:39,476 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:39,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:39,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-15 01:19:39,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989697819] [2020-09-15 01:19:39,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:19:39,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:39,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:19:39,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:19:39,491 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-15 01:19:40,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:40,030 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-09-15 01:19:40,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:19:40,031 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 01:19:40,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:40,032 INFO L225 Difference]: With dead ends: 97 [2020-09-15 01:19:40,032 INFO L226 Difference]: Without dead ends: 91 [2020-09-15 01:19:40,032 INFO L675 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 [2020-09-15 01:19:40,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-15 01:19:40,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-09-15 01:19:40,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 01:19:40,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-15 01:19:40,035 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-15 01:19:40,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:40,035 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-15 01:19:40,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:19:40,035 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-15 01:19:40,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:40,036 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:40,036 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:40,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:40,242 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:40,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:40,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-09-15 01:19:40,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:40,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597251450] [2020-09-15 01:19:40,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:40,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597251450] [2020-09-15 01:19:40,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457898284] [2020-09-15 01:19:40,439 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 [2020-09-15 01:19:40,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:40,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:40,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:40,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:40,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-15 01:19:40,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63222367] [2020-09-15 01:19:40,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:40,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:40,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:40,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:40,519 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-15 01:19:40,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:40,959 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-09-15 01:19:40,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:19:40,960 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-15 01:19:40,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:40,961 INFO L225 Difference]: With dead ends: 94 [2020-09-15 01:19:40,961 INFO L226 Difference]: Without dead ends: 88 [2020-09-15 01:19:40,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:19:40,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-15 01:19:40,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-09-15 01:19:40,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 01:19:40,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-15 01:19:40,964 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-15 01:19:40,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:40,964 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-15 01:19:40,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:40,964 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-15 01:19:40,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:40,964 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:40,965 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:41,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-09-15 01:19:41,165 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:41,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:41,166 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-09-15 01:19:41,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:41,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142837610] [2020-09-15 01:19:41,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:41,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142837610] [2020-09-15 01:19:41,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19821598] [2020-09-15 01:19:41,365 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 [2020-09-15 01:19:41,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:19:41,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:41,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:41,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:41,446 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:41,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:41,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-15 01:19:41,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914294749] [2020-09-15 01:19:41,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:19:41,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:41,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:19:41,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:19:41,461 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-15 01:19:42,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:42,099 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-09-15 01:19:42,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:19:42,100 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 01:19:42,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:42,101 INFO L225 Difference]: With dead ends: 93 [2020-09-15 01:19:42,101 INFO L226 Difference]: Without dead ends: 87 [2020-09-15 01:19:42,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:19:42,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-15 01:19:42,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-09-15 01:19:42,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 01:19:42,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-15 01:19:42,104 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-15 01:19:42,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:42,104 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-15 01:19:42,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:19:42,104 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-15 01:19:42,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:42,104 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:42,104 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:42,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:42,305 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:42,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:42,306 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-09-15 01:19:42,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:42,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271694164] [2020-09-15 01:19:42,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:42,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271694164] [2020-09-15 01:19:42,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57460722] [2020-09-15 01:19:42,499 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 [2020-09-15 01:19:42,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-15 01:19:42,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:42,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:42,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:42,578 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:42,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:42,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-15 01:19:42,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516896012] [2020-09-15 01:19:42,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:42,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:42,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:42,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:42,580 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-15 01:19:43,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:43,075 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-09-15 01:19:43,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:19:43,076 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-15 01:19:43,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:43,077 INFO L225 Difference]: With dead ends: 90 [2020-09-15 01:19:43,077 INFO L226 Difference]: Without dead ends: 84 [2020-09-15 01:19:43,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 01:19:43,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-15 01:19:43,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-09-15 01:19:43,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 01:19:43,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-15 01:19:43,080 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-15 01:19:43,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:43,081 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-15 01:19:43,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:43,081 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-15 01:19:43,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:43,081 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:43,081 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:43,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-15 01:19:43,282 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:43,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:43,283 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-09-15 01:19:43,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:43,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307580678] [2020-09-15 01:19:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:43,472 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:43,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307580678] [2020-09-15 01:19:43,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777861176] [2020-09-15 01:19:43,473 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 [2020-09-15 01:19:43,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:19:43,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:43,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:43,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:43,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:43,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:43,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-15 01:19:43,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006002990] [2020-09-15 01:19:43,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:19:43,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:43,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:19:43,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:19:43,571 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-15 01:19:44,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:44,296 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-15 01:19:44,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:19:44,297 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 01:19:44,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:44,298 INFO L225 Difference]: With dead ends: 89 [2020-09-15 01:19:44,298 INFO L226 Difference]: Without dead ends: 83 [2020-09-15 01:19:44,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:19:44,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-15 01:19:44,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-09-15 01:19:44,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 01:19:44,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-15 01:19:44,301 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-15 01:19:44,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:44,302 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-15 01:19:44,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:19:44,302 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-15 01:19:44,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:44,302 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:44,302 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:44,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:44,503 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:44,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:44,504 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-09-15 01:19:44,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:44,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479779906] [2020-09-15 01:19:44,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:44,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:44,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479779906] [2020-09-15 01:19:44,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146199316] [2020-09-15 01:19:44,681 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 [2020-09-15 01:19:44,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-15 01:19:44,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:44,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:44,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:44,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:44,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-15 01:19:44,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843145043] [2020-09-15 01:19:44,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:44,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:44,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:44,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:44,759 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-15 01:19:45,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:45,389 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-09-15 01:19:45,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:19:45,390 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-15 01:19:45,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:45,391 INFO L225 Difference]: With dead ends: 86 [2020-09-15 01:19:45,391 INFO L226 Difference]: Without dead ends: 80 [2020-09-15 01:19:45,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:19:45,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-15 01:19:45,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-09-15 01:19:45,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 01:19:45,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-15 01:19:45,394 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-15 01:19:45,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:45,394 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-15 01:19:45,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:45,394 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-15 01:19:45,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:45,395 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:45,395 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:45,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:45,602 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:45,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:45,602 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-09-15 01:19:45,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:45,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040792402] [2020-09-15 01:19:45,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:45,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:45,790 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:45,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040792402] [2020-09-15 01:19:45,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478762454] [2020-09-15 01:19:45,790 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 [2020-09-15 01:19:45,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-15 01:19:45,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:45,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:45,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:45,882 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:45,898 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:45,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:45,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-15 01:19:45,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111098289] [2020-09-15 01:19:45,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:19:45,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:45,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:19:45,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:19:45,900 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-15 01:19:46,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:46,740 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-09-15 01:19:46,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:19:46,740 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 01:19:46,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:46,741 INFO L225 Difference]: With dead ends: 85 [2020-09-15 01:19:46,742 INFO L226 Difference]: Without dead ends: 79 [2020-09-15 01:19:46,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 01:19:46,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-15 01:19:46,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-09-15 01:19:46,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 01:19:46,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-15 01:19:46,745 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-15 01:19:46,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:46,745 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-15 01:19:46,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:19:46,745 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-15 01:19:46,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:46,746 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:46,746 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:46,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:46,953 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:46,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:46,954 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-09-15 01:19:46,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:46,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557209394] [2020-09-15 01:19:46,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:47,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557209394] [2020-09-15 01:19:47,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948277795] [2020-09-15 01:19:47,136 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 [2020-09-15 01:19:47,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:47,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:47,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:47,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:47,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-15 01:19:47,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572840036] [2020-09-15 01:19:47,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:47,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:47,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:47,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:47,216 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-15 01:19:47,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:47,901 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-15 01:19:47,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:19:47,902 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-15 01:19:47,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:47,903 INFO L225 Difference]: With dead ends: 101 [2020-09-15 01:19:47,903 INFO L226 Difference]: Without dead ends: 95 [2020-09-15 01:19:47,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:19:47,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-15 01:19:47,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-09-15 01:19:47,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-15 01:19:47,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-09-15 01:19:47,907 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-09-15 01:19:47,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:47,907 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-09-15 01:19:47,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:47,907 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-09-15 01:19:47,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:47,908 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:47,908 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:48,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:48,116 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:48,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:48,117 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-09-15 01:19:48,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:48,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285738439] [2020-09-15 01:19:48,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:48,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:48,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285738439] [2020-09-15 01:19:48,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46327926] [2020-09-15 01:19:48,296 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 [2020-09-15 01:19:48,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:19:48,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:48,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:19:48,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:48,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:48,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-15 01:19:48,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084513027] [2020-09-15 01:19:48,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:19:48,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:48,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:19:48,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:19:48,412 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-09-15 01:19:49,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:49,212 INFO L93 Difference]: Finished difference Result 80 states and 197 transitions. [2020-09-15 01:19:49,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:19:49,213 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 01:19:49,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:49,214 INFO L225 Difference]: With dead ends: 80 [2020-09-15 01:19:49,214 INFO L226 Difference]: Without dead ends: 72 [2020-09-15 01:19:49,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 01:19:49,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-15 01:19:49,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-09-15 01:19:49,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-15 01:19:49,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-09-15 01:19:49,217 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-09-15 01:19:49,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:49,217 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-09-15 01:19:49,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:19:49,218 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-09-15 01:19:49,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:49,218 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:49,218 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:49,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:49,428 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:49,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:49,428 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-09-15 01:19:49,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:49,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677035354] [2020-09-15 01:19:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:49,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:49,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677035354] [2020-09-15 01:19:49,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352545100] [2020-09-15 01:19:49,617 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 [2020-09-15 01:19:49,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-15 01:19:49,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:49,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:49,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:49,704 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:19:49,722 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:49,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:49,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-15 01:19:49,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051964096] [2020-09-15 01:19:49,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:19:49,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:49,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:19:49,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:19:49,724 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-09-15 01:19:50,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:50,553 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-15 01:19:50,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:19:50,554 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 01:19:50,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:50,555 INFO L225 Difference]: With dead ends: 92 [2020-09-15 01:19:50,555 INFO L226 Difference]: Without dead ends: 87 [2020-09-15 01:19:50,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:19:50,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-15 01:19:50,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-09-15 01:19:50,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 01:19:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-15 01:19:50,558 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-09-15 01:19:50,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:50,558 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-15 01:19:50,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:19:50,558 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-15 01:19:50,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:19:50,559 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:50,559 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:50,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:50,760 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:50,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:50,760 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-09-15 01:19:50,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:50,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093770070] [2020-09-15 01:19:50,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:50,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093770070] [2020-09-15 01:19:50,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785212081] [2020-09-15 01:19:50,963 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 [2020-09-15 01:19:51,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:19:51,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:51,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:19:51,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:51,047 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:19:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:51,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:51,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 01:19:51,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530614427] [2020-09-15 01:19:51,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:19:51,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:51,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:19:51,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:19:51,065 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-09-15 01:19:51,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:51,949 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-09-15 01:19:51,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:19:51,950 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 01:19:51,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:51,951 INFO L225 Difference]: With dead ends: 78 [2020-09-15 01:19:51,951 INFO L226 Difference]: Without dead ends: 73 [2020-09-15 01:19:51,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:19:51,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-15 01:19:51,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-09-15 01:19:51,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-15 01:19:51,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-15 01:19:51,953 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-09-15 01:19:51,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:51,953 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-15 01:19:51,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:19:51,953 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-15 01:19:51,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:19:51,953 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:51,954 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:52,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-09-15 01:19:52,155 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:52,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:52,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-09-15 01:19:52,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:52,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804298512] [2020-09-15 01:19:52,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:52,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804298512] [2020-09-15 01:19:52,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474484121] [2020-09-15 01:19:52,400 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 [2020-09-15 01:19:52,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-15 01:19:52,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:52,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:19:52,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:52,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:52,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 01:19:52,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299144157] [2020-09-15 01:19:52,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:19:52,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:52,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:19:52,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:19:52,479 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-09-15 01:19:52,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:52,845 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-15 01:19:52,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:19:52,845 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-15 01:19:52,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:52,846 INFO L225 Difference]: With dead ends: 84 [2020-09-15 01:19:52,846 INFO L226 Difference]: Without dead ends: 78 [2020-09-15 01:19:52,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:19:52,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-15 01:19:52,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-09-15 01:19:52,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:19:52,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-09-15 01:19:52,848 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-09-15 01:19:52,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:52,848 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-09-15 01:19:52,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:19:52,848 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-09-15 01:19:52,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:19:52,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:52,849 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:53,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:53,049 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:53,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:53,050 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-09-15 01:19:53,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:53,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764448239] [2020-09-15 01:19:53,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:53,317 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:53,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764448239] [2020-09-15 01:19:53,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7564706] [2020-09-15 01:19:53,318 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 [2020-09-15 01:19:53,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-15 01:19:53,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:53,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:19:53,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:53,404 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:53,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:53,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 01:19:53,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442690791] [2020-09-15 01:19:53,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:19:53,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:53,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:19:53,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:19:53,418 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-09-15 01:19:53,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:53,863 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-09-15 01:19:53,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:19:53,864 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 01:19:53,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:53,865 INFO L225 Difference]: With dead ends: 98 [2020-09-15 01:19:53,865 INFO L226 Difference]: Without dead ends: 92 [2020-09-15 01:19:53,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-09-15 01:19:53,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-15 01:19:53,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-09-15 01:19:53,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-15 01:19:53,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-09-15 01:19:53,867 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-09-15 01:19:53,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:53,868 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-09-15 01:19:53,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:19:53,868 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-09-15 01:19:53,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:19:53,868 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:53,868 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:54,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-09-15 01:19:54,069 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:54,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:54,070 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-09-15 01:19:54,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:54,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828844590] [2020-09-15 01:19:54,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:54,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:54,315 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:54,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828844590] [2020-09-15 01:19:54,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637543844] [2020-09-15 01:19:54,316 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 [2020-09-15 01:19:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:54,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:19:54,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:54,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:54,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 01:19:54,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993676332] [2020-09-15 01:19:54,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:19:54,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:54,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:19:54,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:19:54,389 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-09-15 01:19:54,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:54,857 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-15 01:19:54,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:19:54,858 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-15 01:19:54,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:54,859 INFO L225 Difference]: With dead ends: 99 [2020-09-15 01:19:54,859 INFO L226 Difference]: Without dead ends: 93 [2020-09-15 01:19:54,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:19:54,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-15 01:19:54,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-09-15 01:19:54,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 01:19:54,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-09-15 01:19:54,863 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-09-15 01:19:54,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:54,863 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-09-15 01:19:54,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:19:54,863 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-09-15 01:19:54,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:19:54,864 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:54,864 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:55,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:55,065 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:55,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:55,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-09-15 01:19:55,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:55,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129894334] [2020-09-15 01:19:55,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:55,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129894334] [2020-09-15 01:19:55,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195525130] [2020-09-15 01:19:55,319 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 [2020-09-15 01:19:55,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:19:55,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:55,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:19:55,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:55,408 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:55,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:55,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 01:19:55,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913240000] [2020-09-15 01:19:55,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:19:55,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:55,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:19:55,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:19:55,432 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-09-15 01:19:55,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:55,999 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-09-15 01:19:56,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:19:56,000 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 01:19:56,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:56,002 INFO L225 Difference]: With dead ends: 109 [2020-09-15 01:19:56,002 INFO L226 Difference]: Without dead ends: 103 [2020-09-15 01:19:56,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 01:19:56,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-15 01:19:56,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-09-15 01:19:56,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:19:56,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-09-15 01:19:56,005 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-09-15 01:19:56,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:56,005 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-09-15 01:19:56,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:19:56,005 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-09-15 01:19:56,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:19:56,006 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:56,006 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:56,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:56,214 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:56,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:56,215 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-09-15 01:19:56,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:56,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348018481] [2020-09-15 01:19:56,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:56,443 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:56,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348018481] [2020-09-15 01:19:56,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218576897] [2020-09-15 01:19:56,444 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 [2020-09-15 01:19:56,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-15 01:19:56,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:56,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:19:56,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:56,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:56,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 01:19:56,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848290552] [2020-09-15 01:19:56,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:19:56,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:56,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:19:56,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:19:56,526 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-09-15 01:19:57,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:57,077 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-09-15 01:19:57,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:19:57,078 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-15 01:19:57,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:57,080 INFO L225 Difference]: With dead ends: 109 [2020-09-15 01:19:57,080 INFO L226 Difference]: Without dead ends: 103 [2020-09-15 01:19:57,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:19:57,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-15 01:19:57,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-09-15 01:19:57,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-15 01:19:57,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-09-15 01:19:57,083 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-09-15 01:19:57,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:57,084 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-09-15 01:19:57,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:19:57,084 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-09-15 01:19:57,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:19:57,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:57,084 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:57,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-09-15 01:19:57,295 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:57,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:57,296 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-09-15 01:19:57,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:57,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185137440] [2020-09-15 01:19:57,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:57,531 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:57,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185137440] [2020-09-15 01:19:57,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415400148] [2020-09-15 01:19:57,532 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 [2020-09-15 01:19:57,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:19:57,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:57,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:19:57,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:57,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:57,618 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:57,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:57,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 01:19:57,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938127134] [2020-09-15 01:19:57,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:19:57,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:57,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:19:57,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:19:57,620 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-09-15 01:19:58,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:58,274 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-09-15 01:19:58,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:19:58,275 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 01:19:58,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:58,276 INFO L225 Difference]: With dead ends: 106 [2020-09-15 01:19:58,277 INFO L226 Difference]: Without dead ends: 100 [2020-09-15 01:19:58,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:19:58,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-15 01:19:58,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-15 01:19:58,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-15 01:19:58,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-09-15 01:19:58,280 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-09-15 01:19:58,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:58,281 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-09-15 01:19:58,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:19:58,281 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-09-15 01:19:58,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:19:58,281 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:58,281 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:58,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-15 01:19:58,484 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:58,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:58,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-09-15 01:19:58,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:58,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758059950] [2020-09-15 01:19:58,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:58,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758059950] [2020-09-15 01:19:58,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588966718] [2020-09-15 01:19:58,717 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 [2020-09-15 01:19:58,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-15 01:19:58,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:58,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:19:58,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:58,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:58,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 01:19:58,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570023018] [2020-09-15 01:19:58,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:19:58,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:58,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:19:58,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:19:58,796 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-09-15 01:19:59,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:59,400 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-09-15 01:19:59,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:19:59,401 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-15 01:19:59,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:59,402 INFO L225 Difference]: With dead ends: 107 [2020-09-15 01:19:59,402 INFO L226 Difference]: Without dead ends: 101 [2020-09-15 01:19:59,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:19:59,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-15 01:19:59,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-15 01:19:59,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-15 01:19:59,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-09-15 01:19:59,405 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-09-15 01:19:59,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:59,406 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-09-15 01:19:59,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:19:59,406 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-09-15 01:19:59,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:19:59,406 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:59,406 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:59,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:59,609 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:59,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:59,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-09-15 01:19:59,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:59,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615287606] [2020-09-15 01:19:59,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:59,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615287606] [2020-09-15 01:19:59,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342296964] [2020-09-15 01:19:59,808 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 [2020-09-15 01:19:59,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-15 01:19:59,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:59,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:19:59,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:59,895 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:59,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:59,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 01:19:59,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785434595] [2020-09-15 01:19:59,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:19:59,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:59,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:19:59,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:19:59,909 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-09-15 01:20:00,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:00,643 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-09-15 01:20:00,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:20:00,644 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 01:20:00,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:00,644 INFO L225 Difference]: With dead ends: 104 [2020-09-15 01:20:00,645 INFO L226 Difference]: Without dead ends: 98 [2020-09-15 01:20:00,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:20:00,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-15 01:20:00,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-09-15 01:20:00,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-15 01:20:00,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-09-15 01:20:00,647 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-09-15 01:20:00,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:00,648 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-09-15 01:20:00,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:20:00,648 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-09-15 01:20:00,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:20:00,648 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:00,649 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:00,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-15 01:20:00,856 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:00,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:00,857 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-09-15 01:20:00,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:00,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083408301] [2020-09-15 01:20:00,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:00,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:01,062 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:01,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083408301] [2020-09-15 01:20:01,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468175593] [2020-09-15 01:20:01,063 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 [2020-09-15 01:20:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:01,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:20:01,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:01,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:01,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 01:20:01,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021847817] [2020-09-15 01:20:01,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:20:01,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:01,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:20:01,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:20:01,153 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-09-15 01:20:01,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:01,815 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-09-15 01:20:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:20:01,816 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-15 01:20:01,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:01,817 INFO L225 Difference]: With dead ends: 105 [2020-09-15 01:20:01,817 INFO L226 Difference]: Without dead ends: 99 [2020-09-15 01:20:01,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 01:20:01,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-15 01:20:01,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-09-15 01:20:01,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 01:20:01,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-15 01:20:01,820 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-09-15 01:20:01,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:01,820 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-15 01:20:01,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:20:01,820 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-15 01:20:01,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:20:01,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:01,821 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:02,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:02,025 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:02,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:02,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-09-15 01:20:02,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:02,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003289389] [2020-09-15 01:20:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:02,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003289389] [2020-09-15 01:20:02,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527737613] [2020-09-15 01:20:02,242 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 [2020-09-15 01:20:02,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:20:02,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:02,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:20:02,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:02,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:02,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:02,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 01:20:02,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614725529] [2020-09-15 01:20:02,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:20:02,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:02,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:20:02,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:20:02,350 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-09-15 01:20:03,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:03,201 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-09-15 01:20:03,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:20:03,202 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 01:20:03,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:03,203 INFO L225 Difference]: With dead ends: 102 [2020-09-15 01:20:03,203 INFO L226 Difference]: Without dead ends: 96 [2020-09-15 01:20:03,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:20:03,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-15 01:20:03,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-09-15 01:20:03,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 01:20:03,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-15 01:20:03,206 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-09-15 01:20:03,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:03,206 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-15 01:20:03,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:20:03,206 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-15 01:20:03,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:20:03,207 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:03,207 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:03,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-15 01:20:03,408 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:03,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:03,408 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-09-15 01:20:03,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:03,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638640114] [2020-09-15 01:20:03,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:03,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638640114] [2020-09-15 01:20:03,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972287183] [2020-09-15 01:20:03,614 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 [2020-09-15 01:20:03,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-15 01:20:03,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:03,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:20:03,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:03,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:03,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 01:20:03,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103978312] [2020-09-15 01:20:03,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:20:03,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:03,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:20:03,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:20:03,700 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-09-15 01:20:04,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:04,439 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-09-15 01:20:04,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:20:04,440 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-15 01:20:04,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:04,441 INFO L225 Difference]: With dead ends: 103 [2020-09-15 01:20:04,441 INFO L226 Difference]: Without dead ends: 97 [2020-09-15 01:20:04,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:20:04,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-15 01:20:04,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-09-15 01:20:04,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-15 01:20:04,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-09-15 01:20:04,445 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-09-15 01:20:04,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:04,445 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-09-15 01:20:04,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:20:04,445 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-09-15 01:20:04,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:20:04,446 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:04,446 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:04,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:04,647 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:04,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:04,648 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-09-15 01:20:04,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:04,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646450497] [2020-09-15 01:20:04,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:04,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:04,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646450497] [2020-09-15 01:20:04,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850403406] [2020-09-15 01:20:04,849 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 [2020-09-15 01:20:04,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:20:04,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:04,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:20:04,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:04,933 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:04,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:04,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 01:20:04,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648720334] [2020-09-15 01:20:04,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:20:04,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:04,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:20:04,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:20:04,948 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-09-15 01:20:05,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:05,859 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-09-15 01:20:05,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:20:05,860 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 01:20:05,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:05,860 INFO L225 Difference]: With dead ends: 100 [2020-09-15 01:20:05,861 INFO L226 Difference]: Without dead ends: 94 [2020-09-15 01:20:05,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:20:05,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-15 01:20:05,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-09-15 01:20:05,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 01:20:05,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-15 01:20:05,864 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-09-15 01:20:05,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:05,864 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-15 01:20:05,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:20:05,864 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-15 01:20:05,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:20:05,865 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:05,865 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:06,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-15 01:20:06,072 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:06,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:06,073 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-09-15 01:20:06,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:06,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198835971] [2020-09-15 01:20:06,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:06,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:06,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198835971] [2020-09-15 01:20:06,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846207736] [2020-09-15 01:20:06,281 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 [2020-09-15 01:20:06,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-15 01:20:06,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:06,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:20:06,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:06,364 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:06,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:06,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 01:20:06,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332259114] [2020-09-15 01:20:06,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:20:06,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:06,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:20:06,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:20:06,366 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-09-15 01:20:07,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:07,150 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-15 01:20:07,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:20:07,151 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-15 01:20:07,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:07,152 INFO L225 Difference]: With dead ends: 120 [2020-09-15 01:20:07,152 INFO L226 Difference]: Without dead ends: 114 [2020-09-15 01:20:07,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:20:07,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-15 01:20:07,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-09-15 01:20:07,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-15 01:20:07,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-09-15 01:20:07,155 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-09-15 01:20:07,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:07,156 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-09-15 01:20:07,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:20:07,156 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-09-15 01:20:07,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:20:07,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:07,156 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:07,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-09-15 01:20:07,365 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:07,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:07,366 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-09-15 01:20:07,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:07,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5120778] [2020-09-15 01:20:07,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:07,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5120778] [2020-09-15 01:20:07,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923106417] [2020-09-15 01:20:07,564 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 [2020-09-15 01:20:07,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-15 01:20:07,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:07,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:07,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:07,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:07,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 01:20:07,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142186878] [2020-09-15 01:20:07,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:20:07,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:07,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:20:07,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:20:07,669 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-09-15 01:20:08,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:08,622 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-09-15 01:20:08,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:20:08,623 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 01:20:08,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:08,623 INFO L225 Difference]: With dead ends: 101 [2020-09-15 01:20:08,623 INFO L226 Difference]: Without dead ends: 93 [2020-09-15 01:20:08,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=575, Invalid=1405, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:20:08,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-15 01:20:08,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-09-15 01:20:08,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-15 01:20:08,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-09-15 01:20:08,626 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-09-15 01:20:08,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:08,626 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-09-15 01:20:08,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:20:08,626 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-09-15 01:20:08,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:08,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:08,627 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:08,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:08,828 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:08,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:08,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-09-15 01:20:08,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:08,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136644896] [2020-09-15 01:20:08,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:09,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136644896] [2020-09-15 01:20:09,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669823511] [2020-09-15 01:20:09,126 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 [2020-09-15 01:20:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:09,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:09,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:09,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:09,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 01:20:09,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046561218] [2020-09-15 01:20:09,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:20:09,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:09,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:20:09,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:20:09,200 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-09-15 01:20:09,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:09,665 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-09-15 01:20:09,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:20:09,666 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-15 01:20:09,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:09,666 INFO L225 Difference]: With dead ends: 114 [2020-09-15 01:20:09,667 INFO L226 Difference]: Without dead ends: 108 [2020-09-15 01:20:09,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:20:09,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-15 01:20:09,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-09-15 01:20:09,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:20:09,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-15 01:20:09,669 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-15 01:20:09,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:09,670 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-15 01:20:09,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:20:09,670 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-15 01:20:09,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:09,670 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:09,670 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:09,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:09,873 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:09,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:09,874 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-09-15 01:20:09,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:09,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369121274] [2020-09-15 01:20:09,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:10,158 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:10,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369121274] [2020-09-15 01:20:10,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564912247] [2020-09-15 01:20:10,159 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 [2020-09-15 01:20:10,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:20:10,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:10,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:10,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:10,245 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:10,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:10,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 01:20:10,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913461725] [2020-09-15 01:20:10,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:10,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:10,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:10,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:10,258 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-15 01:20:10,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:10,816 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-09-15 01:20:10,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:20:10,817 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 01:20:10,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:10,818 INFO L225 Difference]: With dead ends: 111 [2020-09-15 01:20:10,818 INFO L226 Difference]: Without dead ends: 105 [2020-09-15 01:20:10,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:20:10,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-15 01:20:10,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-09-15 01:20:10,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:20:10,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-15 01:20:10,820 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-15 01:20:10,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:10,821 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-15 01:20:10,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:10,821 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-15 01:20:10,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:10,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:10,821 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:11,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-15 01:20:11,024 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:11,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:11,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-09-15 01:20:11,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:11,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224629389] [2020-09-15 01:20:11,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:11,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224629389] [2020-09-15 01:20:11,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007183167] [2020-09-15 01:20:11,282 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 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 [2020-09-15 01:20:11,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-15 01:20:11,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:11,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:11,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:11,360 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:11,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:11,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 01:20:11,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480681176] [2020-09-15 01:20:11,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:20:11,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:11,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:20:11,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:20:11,362 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-15 01:20:11,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:11,895 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-15 01:20:11,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:20:11,896 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-15 01:20:11,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:11,896 INFO L225 Difference]: With dead ends: 108 [2020-09-15 01:20:11,896 INFO L226 Difference]: Without dead ends: 102 [2020-09-15 01:20:11,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 01:20:11,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-15 01:20:11,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-09-15 01:20:11,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:20:11,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-15 01:20:11,899 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-15 01:20:11,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:11,900 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-15 01:20:11,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:20:11,900 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-15 01:20:11,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:11,900 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:11,900 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:12,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:12,107 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:12,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:12,108 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-09-15 01:20:12,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:12,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003040465] [2020-09-15 01:20:12,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:12,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003040465] [2020-09-15 01:20:12,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399153425] [2020-09-15 01:20:12,341 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 [2020-09-15 01:20:12,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:20:12,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:12,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:12,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:12,437 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:12,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:12,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 01:20:12,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620462066] [2020-09-15 01:20:12,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:12,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:12,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:12,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:12,453 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-15 01:20:13,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:13,084 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-09-15 01:20:13,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:20:13,085 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 01:20:13,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:13,086 INFO L225 Difference]: With dead ends: 107 [2020-09-15 01:20:13,086 INFO L226 Difference]: Without dead ends: 101 [2020-09-15 01:20:13,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:20:13,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-15 01:20:13,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-09-15 01:20:13,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:20:13,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-15 01:20:13,091 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-15 01:20:13,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:13,091 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-15 01:20:13,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:13,091 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-15 01:20:13,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:13,092 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:13,092 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:13,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-15 01:20:13,297 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:13,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:13,298 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-09-15 01:20:13,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:13,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268806377] [2020-09-15 01:20:13,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:13,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268806377] [2020-09-15 01:20:13,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864833560] [2020-09-15 01:20:13,544 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 [2020-09-15 01:20:13,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-15 01:20:13,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:13,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:13,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:13,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:13,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 01:20:13,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298546003] [2020-09-15 01:20:13,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:20:13,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:13,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:20:13,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:20:13,624 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-15 01:20:14,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:14,227 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-15 01:20:14,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:20:14,228 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-15 01:20:14,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:14,229 INFO L225 Difference]: With dead ends: 104 [2020-09-15 01:20:14,229 INFO L226 Difference]: Without dead ends: 98 [2020-09-15 01:20:14,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:20:14,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-15 01:20:14,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-09-15 01:20:14,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:20:14,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-15 01:20:14,234 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-15 01:20:14,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:14,234 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-15 01:20:14,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:20:14,235 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-15 01:20:14,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:14,235 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:14,235 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:14,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-15 01:20:14,436 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:14,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:14,437 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-09-15 01:20:14,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:14,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037634332] [2020-09-15 01:20:14,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:14,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:14,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037634332] [2020-09-15 01:20:14,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219338391] [2020-09-15 01:20:14,694 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 [2020-09-15 01:20:14,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-15 01:20:14,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:14,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:14,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:14,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:14,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:14,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 01:20:14,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177843966] [2020-09-15 01:20:14,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:14,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:14,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:14,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:14,802 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-15 01:20:15,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:15,582 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-09-15 01:20:15,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:20:15,583 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 01:20:15,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:15,584 INFO L225 Difference]: With dead ends: 103 [2020-09-15 01:20:15,584 INFO L226 Difference]: Without dead ends: 97 [2020-09-15 01:20:15,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 01:20:15,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-15 01:20:15,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-09-15 01:20:15,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:20:15,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-15 01:20:15,588 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-15 01:20:15,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:15,588 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-15 01:20:15,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:15,588 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-15 01:20:15,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:15,588 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:15,589 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:15,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-15 01:20:15,794 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:15,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:15,795 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-09-15 01:20:15,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:15,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733184763] [2020-09-15 01:20:15,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:16,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733184763] [2020-09-15 01:20:16,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267203485] [2020-09-15 01:20:16,034 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 [2020-09-15 01:20:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:16,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:16,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:16,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:16,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 01:20:16,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464280582] [2020-09-15 01:20:16,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:20:16,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:16,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:20:16,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:20:16,147 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-15 01:20:16,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:16,789 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-09-15 01:20:16,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:20:16,790 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-15 01:20:16,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:16,791 INFO L225 Difference]: With dead ends: 100 [2020-09-15 01:20:16,791 INFO L226 Difference]: Without dead ends: 94 [2020-09-15 01:20:16,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:20:16,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-15 01:20:16,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-09-15 01:20:16,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:20:16,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-15 01:20:16,794 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-15 01:20:16,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:16,794 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-15 01:20:16,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:20:16,796 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-15 01:20:16,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:16,797 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:16,797 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:17,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:17,004 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:17,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:17,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-09-15 01:20:17,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:17,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481764045] [2020-09-15 01:20:17,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:17,234 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:17,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481764045] [2020-09-15 01:20:17,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656953105] [2020-09-15 01:20:17,235 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 [2020-09-15 01:20:17,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:20:17,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:17,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:17,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:17,325 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:17,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:17,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 01:20:17,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038812503] [2020-09-15 01:20:17,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:17,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:17,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:17,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:17,342 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-15 01:20:18,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:18,197 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-09-15 01:20:18,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:20:18,198 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 01:20:18,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:18,199 INFO L225 Difference]: With dead ends: 99 [2020-09-15 01:20:18,199 INFO L226 Difference]: Without dead ends: 93 [2020-09-15 01:20:18,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:20:18,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-15 01:20:18,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-09-15 01:20:18,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:20:18,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-15 01:20:18,202 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-15 01:20:18,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:18,202 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-15 01:20:18,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:18,202 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-15 01:20:18,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:18,203 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:18,203 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:18,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-15 01:20:18,411 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:18,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:18,412 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-09-15 01:20:18,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:18,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091169826] [2020-09-15 01:20:18,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:18,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091169826] [2020-09-15 01:20:18,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722313516] [2020-09-15 01:20:18,640 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 [2020-09-15 01:20:18,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-15 01:20:18,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:18,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:18,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:18,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:18,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 01:20:18,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520796654] [2020-09-15 01:20:18,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:20:18,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:18,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:20:18,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:20:18,725 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-15 01:20:19,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:19,476 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-09-15 01:20:19,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:20:19,477 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-15 01:20:19,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:19,478 INFO L225 Difference]: With dead ends: 96 [2020-09-15 01:20:19,478 INFO L226 Difference]: Without dead ends: 90 [2020-09-15 01:20:19,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:20:19,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-15 01:20:19,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-09-15 01:20:19,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:20:19,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-15 01:20:19,481 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-15 01:20:19,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:19,481 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-15 01:20:19,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:20:19,481 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-15 01:20:19,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:19,482 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:19,482 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:19,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:19,685 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:19,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:19,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-09-15 01:20:19,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:19,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72186091] [2020-09-15 01:20:19,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:19,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72186091] [2020-09-15 01:20:19,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647738243] [2020-09-15 01:20:19,917 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 [2020-09-15 01:20:19,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:20:19,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:19,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:19,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:20,014 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:20,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:20,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 01:20:20,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772284245] [2020-09-15 01:20:20,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:20,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:20,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:20,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:20,031 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-15 01:20:21,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:21,008 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-15 01:20:21,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:20:21,009 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 01:20:21,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:21,010 INFO L225 Difference]: With dead ends: 95 [2020-09-15 01:20:21,010 INFO L226 Difference]: Without dead ends: 89 [2020-09-15 01:20:21,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:20:21,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-15 01:20:21,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-09-15 01:20:21,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:20:21,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-15 01:20:21,012 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-15 01:20:21,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:21,013 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-15 01:20:21,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:21,013 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-15 01:20:21,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:21,013 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:21,013 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:21,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:21,214 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:21,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:21,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-09-15 01:20:21,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:21,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670687458] [2020-09-15 01:20:21,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:21,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670687458] [2020-09-15 01:20:21,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455367016] [2020-09-15 01:20:21,431 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 [2020-09-15 01:20:21,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-15 01:20:21,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:21,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:21,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:21,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:21,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 01:20:21,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574115011] [2020-09-15 01:20:21,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:20:21,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:21,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:20:21,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:20:21,545 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-15 01:20:22,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:22,341 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-15 01:20:22,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:20:22,342 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-15 01:20:22,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:22,343 INFO L225 Difference]: With dead ends: 92 [2020-09-15 01:20:22,343 INFO L226 Difference]: Without dead ends: 86 [2020-09-15 01:20:22,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:20:22,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-15 01:20:22,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-09-15 01:20:22,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:20:22,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-15 01:20:22,346 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-15 01:20:22,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:22,347 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-15 01:20:22,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:20:22,347 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-15 01:20:22,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:22,347 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:22,347 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:22,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:22,555 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:22,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:22,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-09-15 01:20:22,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:22,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642634412] [2020-09-15 01:20:22,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:22,783 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:22,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642634412] [2020-09-15 01:20:22,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860676104] [2020-09-15 01:20:22,783 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 [2020-09-15 01:20:22,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-15 01:20:22,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:22,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:22,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:22,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:22,896 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:22,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:22,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 01:20:22,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146829626] [2020-09-15 01:20:22,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:22,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:22,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:22,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:22,898 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-15 01:20:23,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:23,972 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-09-15 01:20:23,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:20:23,972 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 01:20:23,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:23,973 INFO L225 Difference]: With dead ends: 91 [2020-09-15 01:20:23,973 INFO L226 Difference]: Without dead ends: 85 [2020-09-15 01:20:23,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-09-15 01:20:23,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-15 01:20:23,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-09-15 01:20:23,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:20:23,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-15 01:20:23,977 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-15 01:20:23,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:23,978 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-15 01:20:23,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:23,978 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-15 01:20:23,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:23,979 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:23,979 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:24,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:24,188 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:24,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:24,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-09-15 01:20:24,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:24,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705748461] [2020-09-15 01:20:24,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:24,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705748461] [2020-09-15 01:20:24,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121715077] [2020-09-15 01:20:24,425 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 [2020-09-15 01:20:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:24,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:24,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:24,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:24,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 01:20:24,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726862906] [2020-09-15 01:20:24,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:20:24,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:24,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:20:24,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:20:24,513 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-15 01:20:25,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:25,386 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-15 01:20:25,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:20:25,386 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-15 01:20:25,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:25,387 INFO L225 Difference]: With dead ends: 107 [2020-09-15 01:20:25,387 INFO L226 Difference]: Without dead ends: 101 [2020-09-15 01:20:25,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:20:25,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-15 01:20:25,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-09-15 01:20:25,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-15 01:20:25,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-09-15 01:20:25,389 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-09-15 01:20:25,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:25,390 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-09-15 01:20:25,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:20:25,390 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-09-15 01:20:25,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:25,390 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:25,390 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:25,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-09-15 01:20:25,591 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:25,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:25,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-09-15 01:20:25,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:25,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018150063] [2020-09-15 01:20:25,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:25,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018150063] [2020-09-15 01:20:25,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808059931] [2020-09-15 01:20:25,802 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 [2020-09-15 01:20:25,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:20:25,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:25,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:25,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:25,887 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:25,901 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:25,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:25,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 01:20:25,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951519663] [2020-09-15 01:20:25,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:25,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:25,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:25,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:25,902 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-09-15 01:20:27,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:27,008 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-09-15 01:20:27,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:20:27,009 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 01:20:27,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:27,009 INFO L225 Difference]: With dead ends: 88 [2020-09-15 01:20:27,010 INFO L226 Difference]: Without dead ends: 80 [2020-09-15 01:20:27,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:20:27,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-15 01:20:27,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-09-15 01:20:27,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-15 01:20:27,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-09-15 01:20:27,012 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-09-15 01:20:27,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:27,013 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-09-15 01:20:27,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:27,013 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-09-15 01:20:27,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:27,013 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:27,013 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:27,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-15 01:20:27,214 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:27,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:27,215 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-09-15 01:20:27,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:27,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608326754] [2020-09-15 01:20:27,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:27,411 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:27,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608326754] [2020-09-15 01:20:27,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747451692] [2020-09-15 01:20:27,411 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 [2020-09-15 01:20:27,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-15 01:20:27,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:27,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:27,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:27,507 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:20:27,526 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:27,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:27,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 01:20:27,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406101645] [2020-09-15 01:20:27,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:27,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:27,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:27,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:27,528 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-09-15 01:20:28,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:28,560 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-09-15 01:20:28,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:20:28,561 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 01:20:28,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:28,561 INFO L225 Difference]: With dead ends: 100 [2020-09-15 01:20:28,562 INFO L226 Difference]: Without dead ends: 95 [2020-09-15 01:20:28,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:20:28,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-15 01:20:28,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-09-15 01:20:28,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-15 01:20:28,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-15 01:20:28,565 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-09-15 01:20:28,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:28,565 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-15 01:20:28,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:28,565 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-15 01:20:28,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:28,566 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:28,566 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:28,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-15 01:20:28,767 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:28,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:28,768 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-09-15 01:20:28,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:28,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301835408] [2020-09-15 01:20:28,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:29,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301835408] [2020-09-15 01:20:29,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139025086] [2020-09-15 01:20:29,015 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 [2020-09-15 01:20:29,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:20:29,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:29,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:29,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:29,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:20:29,128 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:29,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:29,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:20:29,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504767058] [2020-09-15 01:20:29,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:20:29,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:29,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:20:29,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:20:29,130 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-09-15 01:20:30,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:30,242 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-09-15 01:20:30,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:20:30,243 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:20:30,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:30,243 INFO L225 Difference]: With dead ends: 84 [2020-09-15 01:20:30,243 INFO L226 Difference]: Without dead ends: 79 [2020-09-15 01:20:30,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:20:30,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-15 01:20:30,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-09-15 01:20:30,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 01:20:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-09-15 01:20:30,246 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-09-15 01:20:30,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:30,246 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-09-15 01:20:30,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:20:30,247 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-09-15 01:20:30,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:30,247 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:30,247 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:30,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-15 01:20:30,448 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:30,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:30,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-09-15 01:20:30,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:30,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980576566] [2020-09-15 01:20:30,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:30,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980576566] [2020-09-15 01:20:30,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315526194] [2020-09-15 01:20:30,764 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 [2020-09-15 01:20:30,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-15 01:20:30,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:30,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:30,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:30,845 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:30,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:30,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 01:20:30,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507204247] [2020-09-15 01:20:30,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:30,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:30,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:30,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:30,847 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-09-15 01:20:31,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:31,330 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-09-15 01:20:31,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:20:31,331 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-15 01:20:31,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:31,331 INFO L225 Difference]: With dead ends: 90 [2020-09-15 01:20:31,332 INFO L226 Difference]: Without dead ends: 84 [2020-09-15 01:20:31,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:20:31,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-15 01:20:31,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-09-15 01:20:31,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-15 01:20:31,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-09-15 01:20:31,334 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-09-15 01:20:31,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:31,334 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-09-15 01:20:31,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:31,335 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-09-15 01:20:31,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:31,335 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:31,335 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:31,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:31,537 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:31,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:31,538 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-09-15 01:20:31,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:31,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396859282] [2020-09-15 01:20:31,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:31,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396859282] [2020-09-15 01:20:31,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554697516] [2020-09-15 01:20:31,861 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 [2020-09-15 01:20:31,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-15 01:20:31,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:31,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:31,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:31,962 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:31,973 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:31,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:31,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:20:31,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071867844] [2020-09-15 01:20:31,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:20:31,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:31,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:20:31,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:20:31,975 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-09-15 01:20:32,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:32,529 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-09-15 01:20:32,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:20:32,530 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:20:32,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:32,530 INFO L225 Difference]: With dead ends: 106 [2020-09-15 01:20:32,531 INFO L226 Difference]: Without dead ends: 100 [2020-09-15 01:20:32,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:20:32,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-15 01:20:32,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-15 01:20:32,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-15 01:20:32,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-09-15 01:20:32,533 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-09-15 01:20:32,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:32,533 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-09-15 01:20:32,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:20:32,534 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-09-15 01:20:32,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:32,534 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:32,534 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:32,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-15 01:20:32,741 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:32,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:32,742 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-09-15 01:20:32,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:32,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994249728] [2020-09-15 01:20:32,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:33,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994249728] [2020-09-15 01:20:33,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609214155] [2020-09-15 01:20:33,048 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 [2020-09-15 01:20:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:33,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:33,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:33,129 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:33,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:33,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 01:20:33,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253525792] [2020-09-15 01:20:33,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:33,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:33,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:33,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:33,130 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-09-15 01:20:33,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:33,741 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-09-15 01:20:33,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:20:33,742 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-15 01:20:33,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:33,742 INFO L225 Difference]: With dead ends: 107 [2020-09-15 01:20:33,742 INFO L226 Difference]: Without dead ends: 101 [2020-09-15 01:20:33,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:20:33,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-15 01:20:33,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-15 01:20:33,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-15 01:20:33,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-09-15 01:20:33,746 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-09-15 01:20:33,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:33,746 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-09-15 01:20:33,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:33,747 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-09-15 01:20:33,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:33,747 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:33,747 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:33,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-09-15 01:20:33,955 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:33,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:33,956 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-09-15 01:20:33,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:33,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976174715] [2020-09-15 01:20:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:34,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976174715] [2020-09-15 01:20:34,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556139649] [2020-09-15 01:20:34,271 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 [2020-09-15 01:20:34,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:20:34,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:34,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:34,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:34,371 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:34,385 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:34,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:34,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:20:34,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318236905] [2020-09-15 01:20:34,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:20:34,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:34,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:20:34,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:20:34,386 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-09-15 01:20:35,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:35,031 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-09-15 01:20:35,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:20:35,032 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:20:35,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:35,033 INFO L225 Difference]: With dead ends: 119 [2020-09-15 01:20:35,033 INFO L226 Difference]: Without dead ends: 113 [2020-09-15 01:20:35,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:20:35,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-15 01:20:35,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-09-15 01:20:35,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-15 01:20:35,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-09-15 01:20:35,036 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-09-15 01:20:35,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:35,036 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-09-15 01:20:35,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:20:35,036 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-09-15 01:20:35,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:35,036 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:35,036 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:35,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-15 01:20:35,237 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:35,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:35,238 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-09-15 01:20:35,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:35,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664496894] [2020-09-15 01:20:35,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:35,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:35,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664496894] [2020-09-15 01:20:35,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451473994] [2020-09-15 01:20:35,530 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 [2020-09-15 01:20:35,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-15 01:20:35,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:35,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:35,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:35,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:35,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 01:20:35,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536179673] [2020-09-15 01:20:35,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:35,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:35,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:35,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:35,621 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-09-15 01:20:36,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:36,283 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-09-15 01:20:36,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:20:36,284 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-15 01:20:36,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:36,284 INFO L225 Difference]: With dead ends: 119 [2020-09-15 01:20:36,284 INFO L226 Difference]: Without dead ends: 113 [2020-09-15 01:20:36,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 01:20:36,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-15 01:20:36,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-09-15 01:20:36,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 01:20:36,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-09-15 01:20:36,288 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-09-15 01:20:36,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:36,288 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-09-15 01:20:36,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:36,288 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-09-15 01:20:36,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:36,289 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:36,289 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:36,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:36,492 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:36,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:36,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-09-15 01:20:36,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:36,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177865104] [2020-09-15 01:20:36,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:36,766 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:36,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177865104] [2020-09-15 01:20:36,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971193132] [2020-09-15 01:20:36,767 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 [2020-09-15 01:20:36,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:20:36,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:36,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:36,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:36,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:36,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:36,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:20:36,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927521166] [2020-09-15 01:20:36,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:20:36,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:36,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:20:36,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:20:36,875 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-09-15 01:20:37,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:37,643 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-09-15 01:20:37,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:20:37,644 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:20:37,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:37,644 INFO L225 Difference]: With dead ends: 116 [2020-09-15 01:20:37,645 INFO L226 Difference]: Without dead ends: 110 [2020-09-15 01:20:37,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:20:37,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-15 01:20:37,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-09-15 01:20:37,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 01:20:37,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-09-15 01:20:37,647 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-09-15 01:20:37,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:37,647 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-09-15 01:20:37,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:20:37,648 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-09-15 01:20:37,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:37,648 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:37,648 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:37,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:37,850 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:37,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:37,850 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-09-15 01:20:37,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:37,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824813328] [2020-09-15 01:20:37,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:38,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824813328] [2020-09-15 01:20:38,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972353994] [2020-09-15 01:20:38,141 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 [2020-09-15 01:20:38,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-15 01:20:38,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:38,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:38,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:38,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:38,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 01:20:38,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606576962] [2020-09-15 01:20:38,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:38,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:38,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:38,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:38,248 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-09-15 01:20:38,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:38,997 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-09-15 01:20:38,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:20:38,998 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-15 01:20:38,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:38,998 INFO L225 Difference]: With dead ends: 117 [2020-09-15 01:20:38,998 INFO L226 Difference]: Without dead ends: 111 [2020-09-15 01:20:38,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:20:38,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-15 01:20:39,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-09-15 01:20:39,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-15 01:20:39,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-09-15 01:20:39,001 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-09-15 01:20:39,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:39,001 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-09-15 01:20:39,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:39,001 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-09-15 01:20:39,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:39,002 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:39,002 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:39,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:39,203 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:39,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:39,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-09-15 01:20:39,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:39,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143531458] [2020-09-15 01:20:39,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:39,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143531458] [2020-09-15 01:20:39,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305748653] [2020-09-15 01:20:39,478 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 [2020-09-15 01:20:39,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-15 01:20:39,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:39,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:39,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:39,567 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:39,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:39,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:20:39,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658317880] [2020-09-15 01:20:39,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:20:39,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:39,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:20:39,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:20:39,584 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-09-15 01:20:40,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:40,426 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-09-15 01:20:40,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:20:40,427 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:20:40,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:40,427 INFO L225 Difference]: With dead ends: 114 [2020-09-15 01:20:40,427 INFO L226 Difference]: Without dead ends: 108 [2020-09-15 01:20:40,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:20:40,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-15 01:20:40,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-09-15 01:20:40,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 01:20:40,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-09-15 01:20:40,430 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-09-15 01:20:40,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:40,430 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-09-15 01:20:40,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:20:40,430 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-09-15 01:20:40,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:40,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:40,431 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:40,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-15 01:20:40,639 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:40,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:40,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-09-15 01:20:40,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:40,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676547105] [2020-09-15 01:20:40,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:40,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676547105] [2020-09-15 01:20:40,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563964700] [2020-09-15 01:20:40,906 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 [2020-09-15 01:20:40,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:40,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:40,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:40,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:40,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 01:20:40,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770102886] [2020-09-15 01:20:40,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:40,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:40,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:40,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:40,987 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-09-15 01:20:41,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:41,781 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-09-15 01:20:41,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:20:41,782 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-15 01:20:41,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:41,783 INFO L225 Difference]: With dead ends: 115 [2020-09-15 01:20:41,783 INFO L226 Difference]: Without dead ends: 109 [2020-09-15 01:20:41,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:20:41,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-15 01:20:41,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-09-15 01:20:41,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-15 01:20:41,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-09-15 01:20:41,785 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-09-15 01:20:41,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:41,786 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-09-15 01:20:41,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:41,786 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-09-15 01:20:41,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:41,786 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:41,786 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:41,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:41,994 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:41,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:41,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-09-15 01:20:41,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:41,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880000462] [2020-09-15 01:20:41,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:42,262 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:42,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880000462] [2020-09-15 01:20:42,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413515991] [2020-09-15 01:20:42,263 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 [2020-09-15 01:20:42,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:20:42,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:42,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:42,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:42,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:42,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:42,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:20:42,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681863210] [2020-09-15 01:20:42,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:20:42,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:42,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:20:42,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:20:42,385 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-09-15 01:20:43,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:43,319 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-09-15 01:20:43,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:20:43,320 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:20:43,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:43,321 INFO L225 Difference]: With dead ends: 112 [2020-09-15 01:20:43,321 INFO L226 Difference]: Without dead ends: 106 [2020-09-15 01:20:43,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:20:43,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-15 01:20:43,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-09-15 01:20:43,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-15 01:20:43,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-09-15 01:20:43,324 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-09-15 01:20:43,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:43,324 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-09-15 01:20:43,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:20:43,324 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-09-15 01:20:43,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:43,325 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:43,325 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:43,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-15 01:20:43,525 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:43,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:43,526 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-09-15 01:20:43,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:43,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53188300] [2020-09-15 01:20:43,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:43,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53188300] [2020-09-15 01:20:43,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632891077] [2020-09-15 01:20:43,783 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 [2020-09-15 01:20:43,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-15 01:20:43,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:43,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:43,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:43,879 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:43,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:43,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 01:20:43,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232561297] [2020-09-15 01:20:43,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:43,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:43,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:43,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:43,880 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-09-15 01:20:44,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:44,735 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-09-15 01:20:44,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:20:44,736 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-15 01:20:44,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:44,737 INFO L225 Difference]: With dead ends: 113 [2020-09-15 01:20:44,737 INFO L226 Difference]: Without dead ends: 107 [2020-09-15 01:20:44,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-09-15 01:20:44,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-15 01:20:44,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-09-15 01:20:44,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:20:44,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-15 01:20:44,739 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-09-15 01:20:44,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:44,740 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-15 01:20:44,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:44,740 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-15 01:20:44,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:44,740 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:44,740 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:44,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-15 01:20:44,941 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:44,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:44,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-09-15 01:20:44,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:44,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103305630] [2020-09-15 01:20:44,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:45,204 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:45,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103305630] [2020-09-15 01:20:45,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617504757] [2020-09-15 01:20:45,205 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 [2020-09-15 01:20:45,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:20:45,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:45,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:45,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:45,296 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:45,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:45,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:20:45,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123492030] [2020-09-15 01:20:45,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:20:45,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:45,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:20:45,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:20:45,315 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-09-15 01:20:46,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:46,383 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-09-15 01:20:46,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:20:46,384 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:20:46,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:46,385 INFO L225 Difference]: With dead ends: 110 [2020-09-15 01:20:46,385 INFO L226 Difference]: Without dead ends: 104 [2020-09-15 01:20:46,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 01:20:46,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-15 01:20:46,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-09-15 01:20:46,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:20:46,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-15 01:20:46,387 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-09-15 01:20:46,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:46,387 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-15 01:20:46,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:20:46,387 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-15 01:20:46,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:46,388 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:46,388 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:46,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-09-15 01:20:46,589 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:46,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:46,589 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-09-15 01:20:46,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:46,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460931102] [2020-09-15 01:20:46,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:46,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460931102] [2020-09-15 01:20:46,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715022450] [2020-09-15 01:20:46,839 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 [2020-09-15 01:20:46,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-15 01:20:46,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:46,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:46,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:46,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:46,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 01:20:46,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337554032] [2020-09-15 01:20:46,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:46,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:46,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:46,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:46,926 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-09-15 01:20:47,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:47,852 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-09-15 01:20:47,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:20:47,853 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-15 01:20:47,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:47,854 INFO L225 Difference]: With dead ends: 111 [2020-09-15 01:20:47,854 INFO L226 Difference]: Without dead ends: 105 [2020-09-15 01:20:47,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:20:47,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-15 01:20:47,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-09-15 01:20:47,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-15 01:20:47,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-09-15 01:20:47,856 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-09-15 01:20:47,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:47,856 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-09-15 01:20:47,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:47,857 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-09-15 01:20:47,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:47,857 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:47,857 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:48,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:48,058 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:48,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:48,058 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-09-15 01:20:48,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:48,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274083835] [2020-09-15 01:20:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:48,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274083835] [2020-09-15 01:20:48,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657106947] [2020-09-15 01:20:48,307 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 [2020-09-15 01:20:48,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-15 01:20:48,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:48,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:48,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:48,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:48,422 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:48,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:48,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:20:48,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755448045] [2020-09-15 01:20:48,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:20:48,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:48,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:20:48,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:20:48,424 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-09-15 01:20:49,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:49,586 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-09-15 01:20:49,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:20:49,587 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:20:49,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:49,587 INFO L225 Difference]: With dead ends: 108 [2020-09-15 01:20:49,587 INFO L226 Difference]: Without dead ends: 102 [2020-09-15 01:20:49,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:20:49,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-15 01:20:49,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-09-15 01:20:49,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-15 01:20:49,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-15 01:20:49,590 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-09-15 01:20:49,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:49,590 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-15 01:20:49,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:20:49,590 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-15 01:20:49,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:49,590 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:49,590 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:49,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-15 01:20:49,791 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:49,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:49,792 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-09-15 01:20:49,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:49,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041770554] [2020-09-15 01:20:49,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:50,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041770554] [2020-09-15 01:20:50,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262673341] [2020-09-15 01:20:50,050 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 [2020-09-15 01:20:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:50,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:50,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:50,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:50,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 01:20:50,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331637941] [2020-09-15 01:20:50,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:50,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:50,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:50,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:50,134 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-09-15 01:20:51,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:51,138 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-09-15 01:20:51,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:20:51,139 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-15 01:20:51,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:51,140 INFO L225 Difference]: With dead ends: 128 [2020-09-15 01:20:51,140 INFO L226 Difference]: Without dead ends: 122 [2020-09-15 01:20:51,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 01:20:51,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-15 01:20:51,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-09-15 01:20:51,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 01:20:51,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-09-15 01:20:51,147 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-09-15 01:20:51,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:51,148 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-09-15 01:20:51,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:51,148 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-09-15 01:20:51,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:51,148 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:51,148 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:51,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:51,349 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:51,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:51,349 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-09-15 01:20:51,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:51,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569161889] [2020-09-15 01:20:51,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:51,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:51,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569161889] [2020-09-15 01:20:51,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886266785] [2020-09-15 01:20:51,601 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 [2020-09-15 01:20:51,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:20:51,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:51,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:20:51,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:51,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:51,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:20:51,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985277676] [2020-09-15 01:20:51,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:20:51,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:51,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:20:51,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:20:51,715 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-09-15 01:20:52,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:52,893 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-09-15 01:20:52,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:20:52,894 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:20:52,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:52,894 INFO L225 Difference]: With dead ends: 109 [2020-09-15 01:20:52,895 INFO L226 Difference]: Without dead ends: 101 [2020-09-15 01:20:52,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=733, Invalid=1817, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 01:20:52,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-15 01:20:52,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-09-15 01:20:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-15 01:20:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-09-15 01:20:52,897 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-09-15 01:20:52,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:52,897 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-09-15 01:20:52,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:20:52,898 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-09-15 01:20:52,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:20:52,898 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:52,898 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:53,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:53,099 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:53,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:53,099 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-09-15 01:20:53,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:53,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599805815] [2020-09-15 01:20:53,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:53,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599805815] [2020-09-15 01:20:53,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697777252] [2020-09-15 01:20:53,455 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 [2020-09-15 01:20:53,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-15 01:20:53,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:53,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:20:53,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:53,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:53,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 01:20:53,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409210543] [2020-09-15 01:20:53,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:20:53,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:53,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:20:53,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:20:53,545 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-09-15 01:20:54,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:54,100 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-09-15 01:20:54,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:20:54,101 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-15 01:20:54,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:54,102 INFO L225 Difference]: With dead ends: 124 [2020-09-15 01:20:54,102 INFO L226 Difference]: Without dead ends: 118 [2020-09-15 01:20:54,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:20:54,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-15 01:20:54,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-09-15 01:20:54,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:20:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-15 01:20:54,104 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-15 01:20:54,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:54,104 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-15 01:20:54,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:20:54,104 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-15 01:20:54,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:20:54,105 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:54,105 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:54,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:54,314 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:54,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:54,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-09-15 01:20:54,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:54,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773545067] [2020-09-15 01:20:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:54,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773545067] [2020-09-15 01:20:54,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404295993] [2020-09-15 01:20:54,675 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 [2020-09-15 01:20:54,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:20:54,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:54,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:20:54,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:54,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:54,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:54,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:20:54,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413231454] [2020-09-15 01:20:54,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:20:54,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:54,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:20:54,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:20:54,777 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-15 01:20:55,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:55,469 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-15 01:20:55,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:20:55,470 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:20:55,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:55,471 INFO L225 Difference]: With dead ends: 121 [2020-09-15 01:20:55,471 INFO L226 Difference]: Without dead ends: 115 [2020-09-15 01:20:55,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 01:20:55,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-15 01:20:55,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-09-15 01:20:55,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:20:55,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-15 01:20:55,474 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-15 01:20:55,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:55,475 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-15 01:20:55,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:20:55,475 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-15 01:20:55,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:20:55,475 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:55,475 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:55,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:55,676 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:55,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:55,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-09-15 01:20:55,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:55,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092201580] [2020-09-15 01:20:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:55,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:56,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092201580] [2020-09-15 01:20:56,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715573772] [2020-09-15 01:20:56,017 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 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 [2020-09-15 01:20:56,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-15 01:20:56,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:56,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:20:56,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:56,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:56,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 01:20:56,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610547685] [2020-09-15 01:20:56,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:20:56,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:56,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:20:56,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:20:56,100 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-15 01:20:56,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:56,757 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-15 01:20:56,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:20:56,758 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-15 01:20:56,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:56,758 INFO L225 Difference]: With dead ends: 118 [2020-09-15 01:20:56,759 INFO L226 Difference]: Without dead ends: 112 [2020-09-15 01:20:56,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:20:56,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-15 01:20:56,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-09-15 01:20:56,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:20:56,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-15 01:20:56,762 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-15 01:20:56,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:56,762 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-15 01:20:56,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:20:56,762 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-15 01:20:56,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:20:56,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:56,762 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:56,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:56,964 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:56,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:56,964 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-09-15 01:20:56,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:56,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184926451] [2020-09-15 01:20:56,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:56,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:57,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184926451] [2020-09-15 01:20:57,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568262515] [2020-09-15 01:20:57,291 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 [2020-09-15 01:20:57,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-15 01:20:57,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:57,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:20:57,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:57,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:57,397 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:57,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:57,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:20:57,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104853500] [2020-09-15 01:20:57,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:20:57,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:57,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:20:57,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:20:57,398 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-15 01:20:58,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:58,162 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-09-15 01:20:58,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:20:58,163 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:20:58,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:58,164 INFO L225 Difference]: With dead ends: 117 [2020-09-15 01:20:58,164 INFO L226 Difference]: Without dead ends: 111 [2020-09-15 01:20:58,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:20:58,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-15 01:20:58,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-09-15 01:20:58,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:20:58,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-15 01:20:58,167 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-15 01:20:58,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:58,167 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-15 01:20:58,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:20:58,167 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-15 01:20:58,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:20:58,168 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:58,168 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:58,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-15 01:20:58,369 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:58,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:58,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-09-15 01:20:58,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:58,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578416288] [2020-09-15 01:20:58,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:58,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578416288] [2020-09-15 01:20:58,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156658097] [2020-09-15 01:20:58,688 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 [2020-09-15 01:20:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:58,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:20:58,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:58,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:58,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 01:20:58,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421796385] [2020-09-15 01:20:58,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:20:58,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:58,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:20:58,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:20:58,770 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-15 01:20:59,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:59,492 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-09-15 01:20:59,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:20:59,493 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-15 01:20:59,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:59,493 INFO L225 Difference]: With dead ends: 114 [2020-09-15 01:20:59,493 INFO L226 Difference]: Without dead ends: 108 [2020-09-15 01:20:59,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:20:59,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-15 01:20:59,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-09-15 01:20:59,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:20:59,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-15 01:20:59,496 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-15 01:20:59,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:59,497 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-15 01:20:59,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:20:59,497 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-15 01:20:59,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:20:59,497 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:59,497 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:59,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-15 01:20:59,700 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:59,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:59,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-09-15 01:20:59,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:59,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804501043] [2020-09-15 01:20:59,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:00,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804501043] [2020-09-15 01:21:00,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164112339] [2020-09-15 01:21:00,027 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 [2020-09-15 01:21:00,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:21:00,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:00,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:00,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:00,122 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:00,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:00,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:21:00,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780002461] [2020-09-15 01:21:00,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:00,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:00,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:00,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:00,139 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-15 01:21:01,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:01,041 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-09-15 01:21:01,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:21:01,042 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:21:01,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:01,042 INFO L225 Difference]: With dead ends: 113 [2020-09-15 01:21:01,043 INFO L226 Difference]: Without dead ends: 107 [2020-09-15 01:21:01,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:21:01,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-15 01:21:01,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-09-15 01:21:01,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:21:01,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-15 01:21:01,045 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-15 01:21:01,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:01,046 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-15 01:21:01,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:01,046 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-15 01:21:01,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:01,046 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:01,046 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:01,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-15 01:21:01,247 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:01,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:01,248 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-09-15 01:21:01,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:01,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655761155] [2020-09-15 01:21:01,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:01,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655761155] [2020-09-15 01:21:01,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683198877] [2020-09-15 01:21:01,554 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 [2020-09-15 01:21:01,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-15 01:21:01,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:01,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:01,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:01,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:01,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 01:21:01,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342641753] [2020-09-15 01:21:01,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:21:01,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:01,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:21:01,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:21:01,638 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-15 01:21:02,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:02,425 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-09-15 01:21:02,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:21:02,426 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-15 01:21:02,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:02,427 INFO L225 Difference]: With dead ends: 110 [2020-09-15 01:21:02,427 INFO L226 Difference]: Without dead ends: 104 [2020-09-15 01:21:02,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:21:02,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-15 01:21:02,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-09-15 01:21:02,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:21:02,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-15 01:21:02,431 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-15 01:21:02,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:02,431 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-15 01:21:02,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:21:02,432 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-15 01:21:02,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:02,432 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:02,432 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:02,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-15 01:21:02,641 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:02,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:02,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-09-15 01:21:02,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:02,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629894205] [2020-09-15 01:21:02,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:02,948 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:02,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629894205] [2020-09-15 01:21:02,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449899626] [2020-09-15 01:21:02,949 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 [2020-09-15 01:21:03,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:21:03,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:03,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:03,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:03,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:03,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:03,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:21:03,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957993990] [2020-09-15 01:21:03,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:03,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:03,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:03,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:03,073 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-15 01:21:04,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:04,092 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-09-15 01:21:04,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:21:04,092 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:21:04,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:04,093 INFO L225 Difference]: With dead ends: 109 [2020-09-15 01:21:04,093 INFO L226 Difference]: Without dead ends: 103 [2020-09-15 01:21:04,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-09-15 01:21:04,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-15 01:21:04,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-09-15 01:21:04,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:21:04,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-15 01:21:04,096 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-15 01:21:04,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:04,096 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-15 01:21:04,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:04,096 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-15 01:21:04,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:04,097 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:04,097 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:04,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:04,298 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:04,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:04,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-09-15 01:21:04,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:04,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807780866] [2020-09-15 01:21:04,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:04,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:04,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807780866] [2020-09-15 01:21:04,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940269227] [2020-09-15 01:21:04,590 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 [2020-09-15 01:21:04,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-15 01:21:04,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:04,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:04,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:04,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:04,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 01:21:04,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013462901] [2020-09-15 01:21:04,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:21:04,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:04,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:21:04,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:21:04,682 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-15 01:21:05,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:05,570 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-09-15 01:21:05,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:21:05,571 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-15 01:21:05,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:05,572 INFO L225 Difference]: With dead ends: 106 [2020-09-15 01:21:05,572 INFO L226 Difference]: Without dead ends: 100 [2020-09-15 01:21:05,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:21:05,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-15 01:21:05,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-09-15 01:21:05,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:21:05,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-15 01:21:05,575 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-15 01:21:05,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:05,575 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-15 01:21:05,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:21:05,575 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-15 01:21:05,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:05,575 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:05,575 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:05,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-09-15 01:21:05,776 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:05,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:05,777 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-09-15 01:21:05,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:05,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984015973] [2020-09-15 01:21:05,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:05,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:06,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984015973] [2020-09-15 01:21:06,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491873864] [2020-09-15 01:21:06,068 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 [2020-09-15 01:21:06,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-15 01:21:06,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:06,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:06,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:06,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:06,179 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:06,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:06,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:21:06,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698985488] [2020-09-15 01:21:06,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:06,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:06,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:06,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:06,181 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-15 01:21:07,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:07,317 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-09-15 01:21:07,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:21:07,318 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:21:07,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:07,319 INFO L225 Difference]: With dead ends: 105 [2020-09-15 01:21:07,319 INFO L226 Difference]: Without dead ends: 99 [2020-09-15 01:21:07,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:21:07,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-15 01:21:07,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-09-15 01:21:07,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:21:07,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-15 01:21:07,321 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-15 01:21:07,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:07,321 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-15 01:21:07,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:07,321 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-15 01:21:07,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:07,322 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:07,322 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:07,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:07,523 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:07,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:07,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-09-15 01:21:07,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:07,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557446824] [2020-09-15 01:21:07,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:07,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557446824] [2020-09-15 01:21:07,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381515457] [2020-09-15 01:21:07,803 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 [2020-09-15 01:21:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:07,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:07,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:07,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:07,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 01:21:07,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673314534] [2020-09-15 01:21:07,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:21:07,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:07,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:21:07,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:21:07,897 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-15 01:21:08,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:08,859 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-09-15 01:21:08,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:21:08,860 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-15 01:21:08,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:08,861 INFO L225 Difference]: With dead ends: 102 [2020-09-15 01:21:08,861 INFO L226 Difference]: Without dead ends: 96 [2020-09-15 01:21:08,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 01:21:08,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-15 01:21:08,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-09-15 01:21:08,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:21:08,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-15 01:21:08,863 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-15 01:21:08,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:08,863 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-15 01:21:08,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:21:08,863 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-15 01:21:08,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:08,864 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:08,864 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:09,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:09,064 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:09,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:09,065 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-09-15 01:21:09,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:09,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628958223] [2020-09-15 01:21:09,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:09,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628958223] [2020-09-15 01:21:09,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109384582] [2020-09-15 01:21:09,356 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 [2020-09-15 01:21:09,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:21:09,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:09,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:09,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:09,447 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:09,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:09,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:21:09,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246246291] [2020-09-15 01:21:09,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:09,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:09,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:09,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:09,468 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-15 01:21:10,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:10,707 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-15 01:21:10,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:21:10,708 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:21:10,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:10,709 INFO L225 Difference]: With dead ends: 101 [2020-09-15 01:21:10,709 INFO L226 Difference]: Without dead ends: 95 [2020-09-15 01:21:10,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 01:21:10,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-15 01:21:10,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-09-15 01:21:10,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:21:10,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-15 01:21:10,712 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-15 01:21:10,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:10,712 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-15 01:21:10,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:10,712 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-15 01:21:10,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:10,713 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:10,713 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:10,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-09-15 01:21:10,917 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:10,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:10,918 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-09-15 01:21:10,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:10,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077334914] [2020-09-15 01:21:10,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:10,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:11,186 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:11,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077334914] [2020-09-15 01:21:11,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182225994] [2020-09-15 01:21:11,187 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 [2020-09-15 01:21:11,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-15 01:21:11,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:11,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:11,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:11,282 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:11,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:11,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 01:21:11,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633022367] [2020-09-15 01:21:11,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:21:11,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:11,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:21:11,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:21:11,283 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-15 01:21:12,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:12,316 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-09-15 01:21:12,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:21:12,317 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-15 01:21:12,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:12,318 INFO L225 Difference]: With dead ends: 98 [2020-09-15 01:21:12,318 INFO L226 Difference]: Without dead ends: 92 [2020-09-15 01:21:12,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:21:12,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-15 01:21:12,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-09-15 01:21:12,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:21:12,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-15 01:21:12,320 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-15 01:21:12,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:12,320 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-15 01:21:12,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:21:12,321 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-15 01:21:12,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:12,321 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:12,321 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:12,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:12,522 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:12,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:12,522 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-09-15 01:21:12,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:12,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278632133] [2020-09-15 01:21:12,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:12,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278632133] [2020-09-15 01:21:12,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179089562] [2020-09-15 01:21:12,802 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 [2020-09-15 01:21:12,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:21:12,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:12,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:12,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:12,893 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:12,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:12,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:21:12,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356549514] [2020-09-15 01:21:12,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:12,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:12,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:12,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:12,914 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-15 01:21:14,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:14,279 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-09-15 01:21:14,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:21:14,280 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:21:14,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:14,281 INFO L225 Difference]: With dead ends: 97 [2020-09-15 01:21:14,281 INFO L226 Difference]: Without dead ends: 91 [2020-09-15 01:21:14,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 01:21:14,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-15 01:21:14,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-09-15 01:21:14,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:21:14,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-15 01:21:14,283 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-15 01:21:14,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:14,283 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-15 01:21:14,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:14,284 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-15 01:21:14,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:14,284 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:14,284 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:14,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-15 01:21:14,485 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:14,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:14,485 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-09-15 01:21:14,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:14,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179393421] [2020-09-15 01:21:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:14,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:14,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179393421] [2020-09-15 01:21:14,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726015829] [2020-09-15 01:21:14,767 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 [2020-09-15 01:21:14,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-15 01:21:14,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:14,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:14,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:14,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:14,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 01:21:14,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933334621] [2020-09-15 01:21:14,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:21:14,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:14,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:21:14,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:21:14,861 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-15 01:21:15,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:15,965 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-09-15 01:21:15,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:21:15,966 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-15 01:21:15,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:15,967 INFO L225 Difference]: With dead ends: 113 [2020-09-15 01:21:15,967 INFO L226 Difference]: Without dead ends: 107 [2020-09-15 01:21:15,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 01:21:15,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-15 01:21:15,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-09-15 01:21:15,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-15 01:21:15,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-09-15 01:21:15,969 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-09-15 01:21:15,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:15,970 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-09-15 01:21:15,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:21:15,970 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-09-15 01:21:15,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:15,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:15,970 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:16,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-15 01:21:16,171 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:16,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:16,172 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-09-15 01:21:16,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:16,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558957722] [2020-09-15 01:21:16,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:16,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558957722] [2020-09-15 01:21:16,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30324273] [2020-09-15 01:21:16,449 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 [2020-09-15 01:21:16,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-15 01:21:16,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:16,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:16,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:16,546 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:16,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:16,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:21:16,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886939964] [2020-09-15 01:21:16,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:16,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:16,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:16,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:16,576 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-09-15 01:21:17,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:17,936 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-09-15 01:21:17,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:21:17,937 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:21:17,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:17,938 INFO L225 Difference]: With dead ends: 94 [2020-09-15 01:21:17,938 INFO L226 Difference]: Without dead ends: 86 [2020-09-15 01:21:17,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 01:21:17,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-15 01:21:17,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-09-15 01:21:17,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-15 01:21:17,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-09-15 01:21:17,940 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-09-15 01:21:17,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:17,940 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-09-15 01:21:17,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:17,940 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-09-15 01:21:17,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:17,941 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:17,941 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:18,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-15 01:21:18,142 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:18,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:18,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-09-15 01:21:18,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:18,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990314842] [2020-09-15 01:21:18,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:18,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990314842] [2020-09-15 01:21:18,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133743900] [2020-09-15 01:21:18,386 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 [2020-09-15 01:21:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:18,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:18,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:18,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:21:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:18,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:18,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:21:18,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223709353] [2020-09-15 01:21:18,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:18,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:18,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:18,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:18,503 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-09-15 01:21:19,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:19,797 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-15 01:21:19,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:21:19,798 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:21:19,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:19,799 INFO L225 Difference]: With dead ends: 108 [2020-09-15 01:21:19,799 INFO L226 Difference]: Without dead ends: 103 [2020-09-15 01:21:19,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 01:21:19,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-15 01:21:19,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-09-15 01:21:19,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 01:21:19,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-15 01:21:19,801 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-09-15 01:21:19,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:19,802 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-15 01:21:19,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:19,802 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-15 01:21:19,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:19,802 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:19,802 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:20,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-15 01:21:20,003 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:20,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:20,004 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-09-15 01:21:20,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:20,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542979326] [2020-09-15 01:21:20,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:20,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542979326] [2020-09-15 01:21:20,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732621917] [2020-09-15 01:21:20,311 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 [2020-09-15 01:21:20,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:21:20,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:20,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:20,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:20,411 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:21:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:20,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:20,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:21:20,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378996311] [2020-09-15 01:21:20,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:21:20,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:20,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:21:20,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:21:20,439 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-09-15 01:21:21,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:21,858 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-09-15 01:21:21,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:21:21,859 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:21:21,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:21,860 INFO L225 Difference]: With dead ends: 90 [2020-09-15 01:21:21,860 INFO L226 Difference]: Without dead ends: 85 [2020-09-15 01:21:21,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 01:21:21,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-15 01:21:21,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-15 01:21:21,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:21:21,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-09-15 01:21:21,861 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-09-15 01:21:21,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:21,862 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-09-15 01:21:21,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:21:21,862 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-09-15 01:21:21,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:21,862 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:21,862 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:22,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:22,063 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:22,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:22,064 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-09-15 01:21:22,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:22,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956523435] [2020-09-15 01:21:22,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:22,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956523435] [2020-09-15 01:21:22,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115065535] [2020-09-15 01:21:22,454 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 [2020-09-15 01:21:22,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 01:21:22,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:22,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:22,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:22,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:22,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:21:22,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360438045] [2020-09-15 01:21:22,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:22,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:22,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:22,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:22,539 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-09-15 01:21:23,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:23,127 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-09-15 01:21:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:21:23,128 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:21:23,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:23,129 INFO L225 Difference]: With dead ends: 96 [2020-09-15 01:21:23,129 INFO L226 Difference]: Without dead ends: 90 [2020-09-15 01:21:23,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:21:23,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-15 01:21:23,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-09-15 01:21:23,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 01:21:23,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-09-15 01:21:23,131 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-09-15 01:21:23,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:23,132 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-09-15 01:21:23,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:23,132 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-09-15 01:21:23,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:23,132 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:23,132 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:23,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:23,333 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:23,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:23,334 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-09-15 01:21:23,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:23,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503581168] [2020-09-15 01:21:23,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:23,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503581168] [2020-09-15 01:21:23,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502552108] [2020-09-15 01:21:23,731 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 [2020-09-15 01:21:23,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:21:23,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:23,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:23,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:23,825 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:23,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:23,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:21:23,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273229336] [2020-09-15 01:21:23,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:21:23,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:23,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:21:23,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:21:23,838 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-09-15 01:21:24,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:24,524 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-09-15 01:21:24,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:21:24,525 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:21:24,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:24,526 INFO L225 Difference]: With dead ends: 114 [2020-09-15 01:21:24,526 INFO L226 Difference]: Without dead ends: 108 [2020-09-15 01:21:24,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 01:21:24,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-15 01:21:24,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-09-15 01:21:24,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 01:21:24,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-09-15 01:21:24,528 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-09-15 01:21:24,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:24,529 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-09-15 01:21:24,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:21:24,529 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-09-15 01:21:24,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:24,529 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:24,529 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:24,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:24,730 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:24,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:24,730 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-09-15 01:21:24,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:24,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13771146] [2020-09-15 01:21:24,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:25,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13771146] [2020-09-15 01:21:25,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437952000] [2020-09-15 01:21:25,111 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 [2020-09-15 01:21:25,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-15 01:21:25,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:25,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:25,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:25,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:25,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:21:25,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756567264] [2020-09-15 01:21:25,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:25,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:25,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:25,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:25,192 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-09-15 01:21:25,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:25,931 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-09-15 01:21:25,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:21:25,932 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:21:25,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:25,933 INFO L225 Difference]: With dead ends: 115 [2020-09-15 01:21:25,933 INFO L226 Difference]: Without dead ends: 109 [2020-09-15 01:21:25,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:21:25,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-15 01:21:25,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-09-15 01:21:25,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-15 01:21:25,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-09-15 01:21:25,936 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-09-15 01:21:25,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:25,936 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-09-15 01:21:25,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:25,936 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-09-15 01:21:25,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:25,937 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:25,937 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:26,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:26,137 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:26,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:26,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-09-15 01:21:26,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:26,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684976114] [2020-09-15 01:21:26,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:26,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684976114] [2020-09-15 01:21:26,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787363686] [2020-09-15 01:21:26,530 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 [2020-09-15 01:21:26,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-15 01:21:26,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:26,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:26,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:26,635 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:26,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:26,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:21:26,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386884880] [2020-09-15 01:21:26,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:21:26,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:26,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:21:26,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:21:26,655 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-09-15 01:21:27,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:27,409 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-09-15 01:21:27,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:21:27,410 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:21:27,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:27,411 INFO L225 Difference]: With dead ends: 129 [2020-09-15 01:21:27,411 INFO L226 Difference]: Without dead ends: 123 [2020-09-15 01:21:27,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:21:27,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-15 01:21:27,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-09-15 01:21:27,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 01:21:27,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-09-15 01:21:27,414 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-09-15 01:21:27,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:27,415 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-09-15 01:21:27,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:21:27,415 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-09-15 01:21:27,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:27,415 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:27,415 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:27,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:27,624 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:27,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:27,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-09-15 01:21:27,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:27,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443782073] [2020-09-15 01:21:27,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:27,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443782073] [2020-09-15 01:21:27,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292283547] [2020-09-15 01:21:27,985 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 [2020-09-15 01:21:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:28,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:28,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:28,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:28,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:21:28,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152814342] [2020-09-15 01:21:28,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:28,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:28,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:28,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:28,066 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-09-15 01:21:28,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:28,879 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-09-15 01:21:28,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:21:28,880 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:21:28,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:28,881 INFO L225 Difference]: With dead ends: 129 [2020-09-15 01:21:28,881 INFO L226 Difference]: Without dead ends: 123 [2020-09-15 01:21:28,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:21:28,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-15 01:21:28,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-09-15 01:21:28,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-15 01:21:28,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-09-15 01:21:28,884 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-09-15 01:21:28,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:28,884 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-09-15 01:21:28,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:28,884 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-09-15 01:21:28,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:28,884 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:28,884 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:29,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:29,085 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:29,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:29,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-09-15 01:21:29,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:29,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116891321] [2020-09-15 01:21:29,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:29,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116891321] [2020-09-15 01:21:29,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668778652] [2020-09-15 01:21:29,452 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 [2020-09-15 01:21:29,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:21:29,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:29,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:29,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:29,546 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:29,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:29,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:21:29,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730961942] [2020-09-15 01:21:29,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:21:29,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:29,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:21:29,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:21:29,562 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-09-15 01:21:30,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:30,477 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-09-15 01:21:30,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:21:30,479 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:21:30,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:30,479 INFO L225 Difference]: With dead ends: 126 [2020-09-15 01:21:30,479 INFO L226 Difference]: Without dead ends: 120 [2020-09-15 01:21:30,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:21:30,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-15 01:21:30,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-09-15 01:21:30,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-15 01:21:30,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-09-15 01:21:30,483 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-09-15 01:21:30,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:30,483 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-09-15 01:21:30,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:21:30,483 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-09-15 01:21:30,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:30,483 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:30,483 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:30,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:30,684 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:30,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:30,685 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-09-15 01:21:30,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:30,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419658288] [2020-09-15 01:21:30,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:31,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419658288] [2020-09-15 01:21:31,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589343550] [2020-09-15 01:21:31,045 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 [2020-09-15 01:21:31,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 01:21:31,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:31,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:31,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:31,134 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:31,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:31,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:21:31,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510922095] [2020-09-15 01:21:31,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:31,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:31,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:31,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:31,135 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-09-15 01:21:32,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:32,013 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-09-15 01:21:32,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:21:32,014 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:21:32,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:32,014 INFO L225 Difference]: With dead ends: 127 [2020-09-15 01:21:32,014 INFO L226 Difference]: Without dead ends: 121 [2020-09-15 01:21:32,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-09-15 01:21:32,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-15 01:21:32,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-09-15 01:21:32,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:21:32,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-09-15 01:21:32,017 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-09-15 01:21:32,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:32,017 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-09-15 01:21:32,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:32,017 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-09-15 01:21:32,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:32,017 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:32,017 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:32,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-15 01:21:32,218 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:32,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:32,219 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-09-15 01:21:32,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:32,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158721620] [2020-09-15 01:21:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:32,568 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:32,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158721620] [2020-09-15 01:21:32,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467552580] [2020-09-15 01:21:32,569 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 [2020-09-15 01:21:32,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:21:32,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:32,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:32,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:32,659 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:32,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:32,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:21:32,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653654779] [2020-09-15 01:21:32,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:21:32,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:32,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:21:32,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:21:32,676 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-09-15 01:21:33,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:33,695 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-09-15 01:21:33,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:21:33,696 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:21:33,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:33,697 INFO L225 Difference]: With dead ends: 124 [2020-09-15 01:21:33,697 INFO L226 Difference]: Without dead ends: 118 [2020-09-15 01:21:33,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 01:21:33,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-15 01:21:33,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-09-15 01:21:33,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:21:33,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-09-15 01:21:33,699 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-09-15 01:21:33,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:33,699 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-09-15 01:21:33,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:21:33,700 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-09-15 01:21:33,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:33,700 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:33,700 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:33,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-09-15 01:21:33,901 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:33,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:33,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-09-15 01:21:33,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:33,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757247504] [2020-09-15 01:21:33,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:34,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757247504] [2020-09-15 01:21:34,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149725155] [2020-09-15 01:21:34,236 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 [2020-09-15 01:21:34,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-15 01:21:34,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:34,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:34,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:34,324 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:34,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:34,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:21:34,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194568019] [2020-09-15 01:21:34,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:34,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:34,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:34,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:34,325 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-09-15 01:21:35,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:35,273 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-09-15 01:21:35,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:21:35,274 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:21:35,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:35,274 INFO L225 Difference]: With dead ends: 125 [2020-09-15 01:21:35,274 INFO L226 Difference]: Without dead ends: 119 [2020-09-15 01:21:35,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:21:35,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-15 01:21:35,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-09-15 01:21:35,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-15 01:21:35,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-09-15 01:21:35,277 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-09-15 01:21:35,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:35,277 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-09-15 01:21:35,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:35,277 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-09-15 01:21:35,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:35,278 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:35,278 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:35,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-15 01:21:35,479 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:35,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:35,479 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-09-15 01:21:35,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:35,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870241824] [2020-09-15 01:21:35,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:35,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870241824] [2020-09-15 01:21:35,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984213813] [2020-09-15 01:21:35,819 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 [2020-09-15 01:21:35,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-15 01:21:35,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:35,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:35,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:35,920 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:35,938 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:35,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:35,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:21:35,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314082439] [2020-09-15 01:21:35,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:21:35,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:35,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:21:35,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:21:35,940 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-09-15 01:21:37,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:37,072 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-09-15 01:21:37,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:21:37,073 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:21:37,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:37,074 INFO L225 Difference]: With dead ends: 122 [2020-09-15 01:21:37,074 INFO L226 Difference]: Without dead ends: 116 [2020-09-15 01:21:37,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:21:37,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-15 01:21:37,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-09-15 01:21:37,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-15 01:21:37,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-09-15 01:21:37,078 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-09-15 01:21:37,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:37,078 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-09-15 01:21:37,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:21:37,078 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-09-15 01:21:37,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:37,078 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:37,078 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:37,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-15 01:21:37,288 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:37,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:37,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-09-15 01:21:37,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:37,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536226112] [2020-09-15 01:21:37,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:37,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536226112] [2020-09-15 01:21:37,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470854008] [2020-09-15 01:21:37,612 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 [2020-09-15 01:21:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:37,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:37,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:37,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:37,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:21:37,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336839544] [2020-09-15 01:21:37,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:37,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:37,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:37,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:37,698 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-09-15 01:21:38,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:38,719 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-15 01:21:38,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:21:38,720 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:21:38,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:38,721 INFO L225 Difference]: With dead ends: 123 [2020-09-15 01:21:38,721 INFO L226 Difference]: Without dead ends: 117 [2020-09-15 01:21:38,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 01:21:38,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-15 01:21:38,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-09-15 01:21:38,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-15 01:21:38,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-09-15 01:21:38,724 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-09-15 01:21:38,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:38,724 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-09-15 01:21:38,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:38,724 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-09-15 01:21:38,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:38,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:38,725 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:38,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:38,925 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:38,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:38,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-09-15 01:21:38,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:38,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855691323] [2020-09-15 01:21:38,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:38,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:39,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855691323] [2020-09-15 01:21:39,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765792328] [2020-09-15 01:21:39,253 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 [2020-09-15 01:21:39,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:21:39,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:39,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:39,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:39,342 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:39,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:39,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:21:39,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177410295] [2020-09-15 01:21:39,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:21:39,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:39,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:21:39,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:21:39,362 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-09-15 01:21:40,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:40,592 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-09-15 01:21:40,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:21:40,593 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:21:40,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:40,594 INFO L225 Difference]: With dead ends: 120 [2020-09-15 01:21:40,594 INFO L226 Difference]: Without dead ends: 114 [2020-09-15 01:21:40,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 01:21:40,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-15 01:21:40,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-09-15 01:21:40,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-15 01:21:40,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-09-15 01:21:40,596 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-09-15 01:21:40,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:40,597 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-09-15 01:21:40,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:21:40,597 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-09-15 01:21:40,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:40,597 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:40,597 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:40,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:40,798 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:40,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:40,798 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-09-15 01:21:40,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:40,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931306320] [2020-09-15 01:21:40,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:41,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931306320] [2020-09-15 01:21:41,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221706427] [2020-09-15 01:21:41,133 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 [2020-09-15 01:21:41,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 01:21:41,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:41,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:41,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:41,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:41,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:21:41,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384440521] [2020-09-15 01:21:41,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:41,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:41,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:41,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:41,224 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-09-15 01:21:42,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:42,323 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-15 01:21:42,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:21:42,323 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:21:42,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:42,324 INFO L225 Difference]: With dead ends: 121 [2020-09-15 01:21:42,324 INFO L226 Difference]: Without dead ends: 115 [2020-09-15 01:21:42,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 01:21:42,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-15 01:21:42,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-09-15 01:21:42,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:21:42,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-15 01:21:42,327 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-09-15 01:21:42,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:42,327 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-15 01:21:42,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:42,327 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-15 01:21:42,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:42,327 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:42,328 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:42,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-09-15 01:21:42,528 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:42,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:42,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-09-15 01:21:42,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:42,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077509365] [2020-09-15 01:21:42,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:42,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077509365] [2020-09-15 01:21:42,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870846249] [2020-09-15 01:21:42,822 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 [2020-09-15 01:21:42,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:21:42,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:42,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:42,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:42,919 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:42,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:42,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:21:42,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547777744] [2020-09-15 01:21:42,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:21:42,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:42,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:21:42,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:21:42,940 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-09-15 01:21:44,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:44,288 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-15 01:21:44,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:21:44,289 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:21:44,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:44,290 INFO L225 Difference]: With dead ends: 118 [2020-09-15 01:21:44,290 INFO L226 Difference]: Without dead ends: 112 [2020-09-15 01:21:44,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-09-15 01:21:44,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-15 01:21:44,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-09-15 01:21:44,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:21:44,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-15 01:21:44,293 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-09-15 01:21:44,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:44,293 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-15 01:21:44,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:21:44,293 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-15 01:21:44,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:44,293 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:44,293 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:44,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:44,494 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:44,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:44,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-09-15 01:21:44,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:44,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484292987] [2020-09-15 01:21:44,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:44,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484292987] [2020-09-15 01:21:44,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999955371] [2020-09-15 01:21:44,818 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 [2020-09-15 01:21:44,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-15 01:21:44,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:44,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:44,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:44,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:44,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:21:44,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357494722] [2020-09-15 01:21:44,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:44,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:44,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:44,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:44,915 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-09-15 01:21:46,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:46,088 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-09-15 01:21:46,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:21:46,089 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:21:46,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:46,091 INFO L225 Difference]: With dead ends: 119 [2020-09-15 01:21:46,091 INFO L226 Difference]: Without dead ends: 113 [2020-09-15 01:21:46,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 01:21:46,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-15 01:21:46,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-09-15 01:21:46,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-15 01:21:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-09-15 01:21:46,093 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-09-15 01:21:46,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:46,094 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-09-15 01:21:46,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:46,094 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-09-15 01:21:46,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:46,094 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:46,094 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:46,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:46,295 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:46,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:46,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-09-15 01:21:46,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:46,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844636409] [2020-09-15 01:21:46,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:46,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844636409] [2020-09-15 01:21:46,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745589143] [2020-09-15 01:21:46,612 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 [2020-09-15 01:21:46,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-15 01:21:46,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:46,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:46,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:46,710 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:46,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:46,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:21:46,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402087335] [2020-09-15 01:21:46,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:21:46,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:46,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:21:46,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:21:46,729 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-09-15 01:21:48,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:48,134 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-09-15 01:21:48,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:21:48,135 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:21:48,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:48,135 INFO L225 Difference]: With dead ends: 116 [2020-09-15 01:21:48,135 INFO L226 Difference]: Without dead ends: 110 [2020-09-15 01:21:48,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 01:21:48,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-15 01:21:48,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-09-15 01:21:48,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 01:21:48,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-15 01:21:48,138 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-09-15 01:21:48,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:48,139 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-15 01:21:48,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:21:48,139 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-15 01:21:48,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:48,140 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:48,140 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:48,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:48,345 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:48,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:48,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-09-15 01:21:48,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:48,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933636030] [2020-09-15 01:21:48,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:48,652 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:48,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933636030] [2020-09-15 01:21:48,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312046252] [2020-09-15 01:21:48,653 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 [2020-09-15 01:21:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:48,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:48,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:48,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:48,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:21:48,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175856333] [2020-09-15 01:21:48,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:48,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:48,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:48,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:48,742 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-09-15 01:21:49,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:49,965 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-09-15 01:21:49,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:21:49,966 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:21:49,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:49,967 INFO L225 Difference]: With dead ends: 136 [2020-09-15 01:21:49,967 INFO L226 Difference]: Without dead ends: 130 [2020-09-15 01:21:49,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 01:21:49,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-15 01:21:49,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-09-15 01:21:49,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-15 01:21:49,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-09-15 01:21:49,970 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-09-15 01:21:49,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:49,970 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-09-15 01:21:49,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:49,970 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-09-15 01:21:49,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:49,971 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:49,971 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:50,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:50,180 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:50,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:50,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-09-15 01:21:50,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:50,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415241349] [2020-09-15 01:21:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:50,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415241349] [2020-09-15 01:21:50,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68367344] [2020-09-15 01:21:50,481 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 [2020-09-15 01:21:50,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:21:50,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:50,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:21:50,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:50,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:50,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:21:50,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130617074] [2020-09-15 01:21:50,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:21:50,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:50,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:21:50,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:21:50,606 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-09-15 01:21:52,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:52,080 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-09-15 01:21:52,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:21:52,082 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:21:52,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:52,082 INFO L225 Difference]: With dead ends: 117 [2020-09-15 01:21:52,082 INFO L226 Difference]: Without dead ends: 109 [2020-09-15 01:21:52,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=910, Invalid=2282, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 01:21:52,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-15 01:21:52,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-09-15 01:21:52,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-15 01:21:52,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-09-15 01:21:52,085 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-09-15 01:21:52,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:52,085 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-09-15 01:21:52,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:21:52,085 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-09-15 01:21:52,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:21:52,085 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:52,086 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:52,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:52,286 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:52,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:52,287 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-09-15 01:21:52,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:52,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33366208] [2020-09-15 01:21:52,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:52,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:52,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33366208] [2020-09-15 01:21:52,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554299081] [2020-09-15 01:21:52,724 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 [2020-09-15 01:21:52,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 01:21:52,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:52,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:21:52,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:52,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:52,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:21:52,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824692426] [2020-09-15 01:21:52,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:21:52,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:52,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:21:52,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:21:52,810 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-09-15 01:21:53,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:53,532 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-09-15 01:21:53,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:21:53,533 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:21:53,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:53,533 INFO L225 Difference]: With dead ends: 134 [2020-09-15 01:21:53,534 INFO L226 Difference]: Without dead ends: 128 [2020-09-15 01:21:53,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:21:53,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-15 01:21:53,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-09-15 01:21:53,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:21:53,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:21:53,536 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-15 01:21:53,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:53,536 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:21:53,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:21:53,536 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:21:53,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:21:53,537 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:53,537 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:53,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-09-15 01:21:53,738 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:53,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:53,738 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-09-15 01:21:53,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:53,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667608379] [2020-09-15 01:21:53,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:54,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667608379] [2020-09-15 01:21:54,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887230712] [2020-09-15 01:21:54,183 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 [2020-09-15 01:21:54,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:21:54,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:54,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:21:54,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:54,277 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:54,293 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:54,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:54,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:21:54,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818933595] [2020-09-15 01:21:54,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:21:54,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:54,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:21:54,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:21:54,294 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-15 01:21:55,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:55,134 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-09-15 01:21:55,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:21:55,135 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:21:55,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:55,136 INFO L225 Difference]: With dead ends: 131 [2020-09-15 01:21:55,136 INFO L226 Difference]: Without dead ends: 125 [2020-09-15 01:21:55,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:21:55,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-15 01:21:55,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-09-15 01:21:55,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:21:55,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:21:55,140 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-15 01:21:55,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:55,140 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:21:55,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:21:55,140 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:21:55,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:21:55,141 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:55,141 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:55,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-15 01:21:55,342 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:55,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:55,342 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-09-15 01:21:55,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:55,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951665840] [2020-09-15 01:21:55,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:55,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951665840] [2020-09-15 01:21:55,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452263736] [2020-09-15 01:21:55,759 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 [2020-09-15 01:21:55,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-15 01:21:55,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:55,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:21:55,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:55,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:55,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:21:55,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823705810] [2020-09-15 01:21:55,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:21:55,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:55,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:21:55,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:21:55,844 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-15 01:21:56,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:56,639 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-09-15 01:21:56,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:21:56,640 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:21:56,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:56,641 INFO L225 Difference]: With dead ends: 128 [2020-09-15 01:21:56,641 INFO L226 Difference]: Without dead ends: 122 [2020-09-15 01:21:56,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:21:56,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-15 01:21:56,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-09-15 01:21:56,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:21:56,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:21:56,644 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-15 01:21:56,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:56,644 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:21:56,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:21:56,644 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:21:56,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:21:56,645 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:56,645 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:56,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:56,846 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:56,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:56,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-09-15 01:21:56,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:56,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679557673] [2020-09-15 01:21:56,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:57,276 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:57,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679557673] [2020-09-15 01:21:57,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128222729] [2020-09-15 01:21:57,276 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 [2020-09-15 01:21:57,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-15 01:21:57,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:57,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:21:57,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:57,379 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:57,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:57,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:21:57,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65469544] [2020-09-15 01:21:57,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:21:57,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:57,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:21:57,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:21:57,401 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-15 01:21:58,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:58,332 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-09-15 01:21:58,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:21:58,333 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:21:58,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:58,334 INFO L225 Difference]: With dead ends: 127 [2020-09-15 01:21:58,334 INFO L226 Difference]: Without dead ends: 121 [2020-09-15 01:21:58,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-09-15 01:21:58,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-15 01:21:58,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-09-15 01:21:58,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:21:58,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:21:58,337 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-15 01:21:58,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:58,337 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:21:58,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:21:58,337 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:21:58,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:21:58,337 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:58,337 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:58,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-09-15 01:21:58,538 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:58,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:58,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-09-15 01:21:58,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:58,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294717967] [2020-09-15 01:21:58,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:58,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294717967] [2020-09-15 01:21:58,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176934180] [2020-09-15 01:21:58,937 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 [2020-09-15 01:21:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:59,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:21:59,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:59,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:59,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:21:59,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139186370] [2020-09-15 01:21:59,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:21:59,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:59,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:21:59,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:21:59,021 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-15 01:21:59,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:59,881 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-09-15 01:21:59,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:21:59,882 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:21:59,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:59,883 INFO L225 Difference]: With dead ends: 124 [2020-09-15 01:21:59,883 INFO L226 Difference]: Without dead ends: 118 [2020-09-15 01:21:59,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:21:59,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-15 01:21:59,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-09-15 01:21:59,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:21:59,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:21:59,885 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-15 01:21:59,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:59,886 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:21:59,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:21:59,886 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:21:59,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:21:59,886 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:59,886 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:00,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:00,087 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:00,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:00,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-09-15 01:22:00,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:00,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101102430] [2020-09-15 01:22:00,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:00,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101102430] [2020-09-15 01:22:00,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299682955] [2020-09-15 01:22:00,487 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 [2020-09-15 01:22:00,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:22:00,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:00,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:00,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:00,585 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:00,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:00,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:22:00,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595730689] [2020-09-15 01:22:00,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:00,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:00,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:00,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:00,601 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-15 01:22:01,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:01,685 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-09-15 01:22:01,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:22:01,686 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:22:01,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:01,687 INFO L225 Difference]: With dead ends: 123 [2020-09-15 01:22:01,687 INFO L226 Difference]: Without dead ends: 117 [2020-09-15 01:22:01,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:22:01,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-15 01:22:01,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-09-15 01:22:01,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:22:01,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:22:01,689 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-15 01:22:01,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:01,689 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:22:01,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:01,689 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:22:01,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:01,690 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:01,690 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:01,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:01,897 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:01,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:01,898 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-09-15 01:22:01,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:01,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408330719] [2020-09-15 01:22:01,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:02,277 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:02,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408330719] [2020-09-15 01:22:02,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82813761] [2020-09-15 01:22:02,278 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 [2020-09-15 01:22:02,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 01:22:02,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:02,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:02,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:02,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:02,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:22:02,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091446137] [2020-09-15 01:22:02,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:22:02,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:02,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:22:02,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:22:02,373 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-15 01:22:03,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:03,338 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-15 01:22:03,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:22:03,339 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:22:03,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:03,339 INFO L225 Difference]: With dead ends: 120 [2020-09-15 01:22:03,339 INFO L226 Difference]: Without dead ends: 114 [2020-09-15 01:22:03,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 01:22:03,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-15 01:22:03,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-09-15 01:22:03,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:22:03,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:22:03,347 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-15 01:22:03,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:03,347 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:22:03,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:22:03,347 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:22:03,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:03,347 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:03,348 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:03,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:03,548 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:03,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:03,549 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-09-15 01:22:03,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:03,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245698004] [2020-09-15 01:22:03,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:03,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245698004] [2020-09-15 01:22:03,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725414695] [2020-09-15 01:22:03,929 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 [2020-09-15 01:22:03,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:22:03,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:03,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:03,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:04,018 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:04,034 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:04,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:04,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:22:04,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998537118] [2020-09-15 01:22:04,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:04,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:04,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:04,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:04,035 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-15 01:22:05,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:05,251 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-09-15 01:22:05,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:22:05,252 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:22:05,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:05,253 INFO L225 Difference]: With dead ends: 119 [2020-09-15 01:22:05,254 INFO L226 Difference]: Without dead ends: 113 [2020-09-15 01:22:05,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 01:22:05,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-15 01:22:05,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-09-15 01:22:05,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:22:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:22:05,259 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-15 01:22:05,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:05,259 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:22:05,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:22:05,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:05,260 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:05,260 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:05,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:05,468 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:05,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:05,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-09-15 01:22:05,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:05,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829400804] [2020-09-15 01:22:05,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:05,839 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:05,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829400804] [2020-09-15 01:22:05,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080874573] [2020-09-15 01:22:05,840 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 [2020-09-15 01:22:05,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-15 01:22:05,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:05,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:05,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:05,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:05,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:22:05,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307037461] [2020-09-15 01:22:05,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:22:05,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:05,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:22:05,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:22:05,933 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-15 01:22:06,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:06,997 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-09-15 01:22:06,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:22:06,998 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:22:06,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:06,999 INFO L225 Difference]: With dead ends: 116 [2020-09-15 01:22:06,999 INFO L226 Difference]: Without dead ends: 110 [2020-09-15 01:22:07,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:22:07,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-15 01:22:07,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-09-15 01:22:07,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:22:07,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:22:07,002 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-15 01:22:07,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:07,002 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:22:07,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:22:07,002 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:22:07,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:07,003 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:07,003 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:07,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-09-15 01:22:07,204 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:07,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:07,204 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-09-15 01:22:07,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:07,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545970381] [2020-09-15 01:22:07,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:07,573 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:07,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545970381] [2020-09-15 01:22:07,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776968700] [2020-09-15 01:22:07,573 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 [2020-09-15 01:22:07,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-15 01:22:07,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:07,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:07,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:07,685 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:07,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:07,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:22:07,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55698996] [2020-09-15 01:22:07,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:07,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:07,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:07,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:07,704 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-15 01:22:09,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:09,061 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-09-15 01:22:09,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:22:09,062 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:22:09,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:09,063 INFO L225 Difference]: With dead ends: 115 [2020-09-15 01:22:09,063 INFO L226 Difference]: Without dead ends: 109 [2020-09-15 01:22:09,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 01:22:09,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-15 01:22:09,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-09-15 01:22:09,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:22:09,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:22:09,068 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-15 01:22:09,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:09,068 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:22:09,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:09,068 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:22:09,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:09,068 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:09,069 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:09,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:09,276 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:09,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:09,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-09-15 01:22:09,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:09,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421918904] [2020-09-15 01:22:09,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:09,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421918904] [2020-09-15 01:22:09,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596207350] [2020-09-15 01:22:09,639 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 [2020-09-15 01:22:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:09,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:09,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:09,733 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:09,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:09,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:22:09,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802285853] [2020-09-15 01:22:09,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:22:09,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:09,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:22:09,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:22:09,735 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-15 01:22:10,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:10,885 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-09-15 01:22:10,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:22:10,887 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:22:10,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:10,887 INFO L225 Difference]: With dead ends: 112 [2020-09-15 01:22:10,887 INFO L226 Difference]: Without dead ends: 106 [2020-09-15 01:22:10,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 01:22:10,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-15 01:22:10,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-09-15 01:22:10,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:22:10,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:22:10,890 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-15 01:22:10,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:10,890 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:22:10,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:22:10,890 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:22:10,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:10,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:10,890 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:11,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-09-15 01:22:11,091 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:11,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:11,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-09-15 01:22:11,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:11,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797323495] [2020-09-15 01:22:11,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:11,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:11,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797323495] [2020-09-15 01:22:11,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719994702] [2020-09-15 01:22:11,458 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 [2020-09-15 01:22:11,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:22:11,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:11,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:11,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:11,560 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:11,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:11,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:22:11,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794442790] [2020-09-15 01:22:11,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:11,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:11,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:11,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:11,584 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-15 01:22:13,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:13,046 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-09-15 01:22:13,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:22:13,047 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:22:13,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:13,047 INFO L225 Difference]: With dead ends: 111 [2020-09-15 01:22:13,047 INFO L226 Difference]: Without dead ends: 105 [2020-09-15 01:22:13,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 01:22:13,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-15 01:22:13,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-09-15 01:22:13,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:22:13,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:22:13,050 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-15 01:22:13,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:13,050 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:22:13,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:13,050 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:22:13,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:13,050 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:13,051 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:13,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-15 01:22:13,251 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:13,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:13,252 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-09-15 01:22:13,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:13,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388071188] [2020-09-15 01:22:13,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:13,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388071188] [2020-09-15 01:22:13,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896226025] [2020-09-15 01:22:13,603 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 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 [2020-09-15 01:22:13,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 01:22:13,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:13,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:13,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:13,699 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:13,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:13,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:22:13,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335971253] [2020-09-15 01:22:13,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:22:13,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:13,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:22:13,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:22:13,701 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-15 01:22:14,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:14,932 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-15 01:22:14,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:22:14,933 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:22:14,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:14,933 INFO L225 Difference]: With dead ends: 108 [2020-09-15 01:22:14,934 INFO L226 Difference]: Without dead ends: 102 [2020-09-15 01:22:14,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-09-15 01:22:14,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-15 01:22:14,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-09-15 01:22:14,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:22:14,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:22:14,936 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-15 01:22:14,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:14,937 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:22:14,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:22:14,937 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:22:14,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:14,937 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:14,937 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:15,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:15,144 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:15,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:15,144 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-09-15 01:22:15,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:15,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444430622] [2020-09-15 01:22:15,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:15,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:15,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444430622] [2020-09-15 01:22:15,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683173060] [2020-09-15 01:22:15,496 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 [2020-09-15 01:22:15,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:22:15,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:15,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:15,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:15,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:15,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:15,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:22:15,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373193043] [2020-09-15 01:22:15,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:15,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:15,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:15,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:15,618 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-15 01:22:17,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:17,214 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-15 01:22:17,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:22:17,215 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:22:17,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:17,216 INFO L225 Difference]: With dead ends: 107 [2020-09-15 01:22:17,216 INFO L226 Difference]: Without dead ends: 101 [2020-09-15 01:22:17,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 01:22:17,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-15 01:22:17,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-09-15 01:22:17,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:22:17,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:22:17,220 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-15 01:22:17,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:17,220 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:22:17,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:17,220 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:22:17,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:17,221 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:17,221 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:17,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:17,424 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:17,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:17,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-09-15 01:22:17,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:17,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350086851] [2020-09-15 01:22:17,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:17,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350086851] [2020-09-15 01:22:17,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463698773] [2020-09-15 01:22:17,770 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 [2020-09-15 01:22:17,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-15 01:22:17,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:17,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:17,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:17,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:17,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:22:17,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633707235] [2020-09-15 01:22:17,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:22:17,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:17,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:22:17,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:22:17,864 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-15 01:22:19,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:19,163 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-09-15 01:22:19,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:22:19,165 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:22:19,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:19,165 INFO L225 Difference]: With dead ends: 104 [2020-09-15 01:22:19,165 INFO L226 Difference]: Without dead ends: 98 [2020-09-15 01:22:19,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 01:22:19,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-15 01:22:19,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-09-15 01:22:19,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:22:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:22:19,168 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-15 01:22:19,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:19,168 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:22:19,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:22:19,168 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:22:19,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:19,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:19,169 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:19,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:19,369 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:19,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:19,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-09-15 01:22:19,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:19,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586202633] [2020-09-15 01:22:19,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:19,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586202633] [2020-09-15 01:22:19,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021461122] [2020-09-15 01:22:19,714 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 [2020-09-15 01:22:19,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-15 01:22:19,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:19,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:19,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:19,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:19,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:19,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:22:19,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553919744] [2020-09-15 01:22:19,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:19,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:19,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:19,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:19,848 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-15 01:22:21,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:21,547 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-09-15 01:22:21,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:22:21,548 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:22:21,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:21,548 INFO L225 Difference]: With dead ends: 103 [2020-09-15 01:22:21,549 INFO L226 Difference]: Without dead ends: 97 [2020-09-15 01:22:21,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-09-15 01:22:21,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-15 01:22:21,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-09-15 01:22:21,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:22:21,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:22:21,552 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-15 01:22:21,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:21,552 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:22:21,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:21,552 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:22:21,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:21,552 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:21,553 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:21,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-09-15 01:22:21,761 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:21,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:21,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-09-15 01:22:21,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:21,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638384384] [2020-09-15 01:22:21,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:22,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638384384] [2020-09-15 01:22:22,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907192911] [2020-09-15 01:22:22,116 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 [2020-09-15 01:22:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:22,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:22,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:22,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:22,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:22:22,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904759625] [2020-09-15 01:22:22,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:22:22,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:22,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:22:22,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:22:22,219 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-15 01:22:23,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:23,608 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-09-15 01:22:23,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:22:23,609 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:22:23,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:23,609 INFO L225 Difference]: With dead ends: 119 [2020-09-15 01:22:23,610 INFO L226 Difference]: Without dead ends: 113 [2020-09-15 01:22:23,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 01:22:23,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-15 01:22:23,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-09-15 01:22:23,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-15 01:22:23,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-09-15 01:22:23,613 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-09-15 01:22:23,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:23,613 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-09-15 01:22:23,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:22:23,613 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-09-15 01:22:23,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:23,613 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:23,613 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:23,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:23,814 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:23,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:23,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-09-15 01:22:23,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:23,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418737211] [2020-09-15 01:22:23,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:24,166 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:24,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418737211] [2020-09-15 01:22:24,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160163255] [2020-09-15 01:22:24,167 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 [2020-09-15 01:22:24,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:22:24,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:24,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:24,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:24,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:24,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:22:24,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857570415] [2020-09-15 01:22:24,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:24,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:24,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:24,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:24,292 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-09-15 01:22:25,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:25,884 INFO L93 Difference]: Finished difference Result 98 states and 245 transitions. [2020-09-15 01:22:25,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:22:25,885 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:22:25,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:25,886 INFO L225 Difference]: With dead ends: 98 [2020-09-15 01:22:25,886 INFO L226 Difference]: Without dead ends: 90 [2020-09-15 01:22:25,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=924, Invalid=2382, Unknown=0, NotChecked=0, Total=3306 [2020-09-15 01:22:25,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-15 01:22:25,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 65. [2020-09-15 01:22:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-15 01:22:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-09-15 01:22:25,888 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-09-15 01:22:25,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:25,889 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-09-15 01:22:25,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-09-15 01:22:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:25,889 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:25,889 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:26,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:26,090 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:26,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:26,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-09-15 01:22:26,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:26,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799658344] [2020-09-15 01:22:26,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:26,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799658344] [2020-09-15 01:22:26,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990037107] [2020-09-15 01:22:26,439 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 [2020-09-15 01:22:26,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 01:22:26,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:26,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:26,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:26,543 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:22:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:26,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:26,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:22:26,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94825223] [2020-09-15 01:22:26,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:26,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:26,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:26,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:26,571 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-09-15 01:22:28,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:28,238 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-09-15 01:22:28,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:22:28,239 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:22:28,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:28,239 INFO L225 Difference]: With dead ends: 116 [2020-09-15 01:22:28,239 INFO L226 Difference]: Without dead ends: 111 [2020-09-15 01:22:28,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 01:22:28,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-15 01:22:28,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-09-15 01:22:28,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-15 01:22:28,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-15 01:22:28,242 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-09-15 01:22:28,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:28,242 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-15 01:22:28,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:28,242 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-15 01:22:28,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:28,243 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:28,243 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:28,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:28,444 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:28,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:28,444 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-09-15 01:22:28,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:28,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692677480] [2020-09-15 01:22:28,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:28,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692677480] [2020-09-15 01:22:28,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274512732] [2020-09-15 01:22:28,824 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 [2020-09-15 01:22:28,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:22:28,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:28,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:28,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:28,925 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:22:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:28,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:28,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:22:28,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697858845] [2020-09-15 01:22:28,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:22:28,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:28,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:22:28,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:22:28,955 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-09-15 01:22:30,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:30,782 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-09-15 01:22:30,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:22:30,783 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:22:30,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:30,783 INFO L225 Difference]: With dead ends: 96 [2020-09-15 01:22:30,783 INFO L226 Difference]: Without dead ends: 91 [2020-09-15 01:22:30,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 01:22:30,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-15 01:22:30,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-09-15 01:22:30,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-15 01:22:30,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-09-15 01:22:30,786 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-09-15 01:22:30,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:30,786 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-09-15 01:22:30,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:22:30,786 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-09-15 01:22:30,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:30,786 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:30,787 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:30,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:30,987 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:30,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:30,988 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-09-15 01:22:30,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:30,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722755735] [2020-09-15 01:22:30,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:31,472 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:31,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722755735] [2020-09-15 01:22:31,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147928339] [2020-09-15 01:22:31,473 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 [2020-09-15 01:22:31,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-15 01:22:31,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:31,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:31,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:31,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:31,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:22:31,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212868813] [2020-09-15 01:22:31,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:31,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:31,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:31,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:31,561 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-09-15 01:22:32,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:32,325 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-09-15 01:22:32,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:22:32,326 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:22:32,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:32,326 INFO L225 Difference]: With dead ends: 102 [2020-09-15 01:22:32,326 INFO L226 Difference]: Without dead ends: 96 [2020-09-15 01:22:32,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:22:32,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-15 01:22:32,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-09-15 01:22:32,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:22:32,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-09-15 01:22:32,329 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-09-15 01:22:32,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:32,330 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-09-15 01:22:32,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:32,330 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-09-15 01:22:32,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:32,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:32,330 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:32,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-09-15 01:22:32,531 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:32,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:32,532 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-09-15 01:22:32,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:32,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031489567] [2020-09-15 01:22:32,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:33,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031489567] [2020-09-15 01:22:33,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784031978] [2020-09-15 01:22:33,026 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 [2020-09-15 01:22:33,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 01:22:33,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:33,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:33,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:33,131 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:33,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:33,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:22:33,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129692362] [2020-09-15 01:22:33,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:22:33,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:33,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:22:33,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:22:33,152 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-09-15 01:22:33,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:33,916 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-09-15 01:22:33,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:22:33,917 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:22:33,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:33,918 INFO L225 Difference]: With dead ends: 122 [2020-09-15 01:22:33,918 INFO L226 Difference]: Without dead ends: 116 [2020-09-15 01:22:33,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:22:33,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-15 01:22:33,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-09-15 01:22:33,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-15 01:22:33,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-09-15 01:22:33,921 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-09-15 01:22:33,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:33,921 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-09-15 01:22:33,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:22:33,921 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-09-15 01:22:33,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:33,921 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:33,921 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:34,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-15 01:22:34,122 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:34,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:34,123 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-09-15 01:22:34,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:34,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459415719] [2020-09-15 01:22:34,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:34,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459415719] [2020-09-15 01:22:34,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308635621] [2020-09-15 01:22:34,608 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 [2020-09-15 01:22:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:34,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:34,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:34,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:34,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:22:34,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847158352] [2020-09-15 01:22:34,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:34,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:34,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:34,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:34,688 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-09-15 01:22:35,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:35,615 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-09-15 01:22:35,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:22:35,616 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:22:35,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:35,617 INFO L225 Difference]: With dead ends: 123 [2020-09-15 01:22:35,617 INFO L226 Difference]: Without dead ends: 117 [2020-09-15 01:22:35,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:22:35,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-15 01:22:35,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-09-15 01:22:35,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:22:35,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-09-15 01:22:35,619 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-09-15 01:22:35,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:35,619 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-09-15 01:22:35,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:35,619 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-09-15 01:22:35,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:35,620 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:35,620 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:35,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-09-15 01:22:35,821 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:35,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:35,821 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-09-15 01:22:35,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:35,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300846722] [2020-09-15 01:22:35,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:36,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300846722] [2020-09-15 01:22:36,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876370740] [2020-09-15 01:22:36,313 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 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 [2020-09-15 01:22:36,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:22:36,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:36,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:36,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:36,414 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:36,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:36,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:22:36,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617062415] [2020-09-15 01:22:36,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:22:36,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:36,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:22:36,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:22:36,430 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-09-15 01:22:37,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:37,393 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-09-15 01:22:37,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:22:37,395 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:22:37,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:37,395 INFO L225 Difference]: With dead ends: 139 [2020-09-15 01:22:37,395 INFO L226 Difference]: Without dead ends: 133 [2020-09-15 01:22:37,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 01:22:37,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-15 01:22:37,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-09-15 01:22:37,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:22:37,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-09-15 01:22:37,400 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-09-15 01:22:37,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:37,400 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-09-15 01:22:37,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:22:37,400 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-09-15 01:22:37,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:37,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:37,401 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:37,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-09-15 01:22:37,609 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:37,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:37,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-09-15 01:22:37,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:37,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158509833] [2020-09-15 01:22:37,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:38,062 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:38,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158509833] [2020-09-15 01:22:38,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071070532] [2020-09-15 01:22:38,063 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 [2020-09-15 01:22:38,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-15 01:22:38,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:38,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:38,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:38,151 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:38,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:38,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:22:38,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819205726] [2020-09-15 01:22:38,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:38,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:38,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:38,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:38,152 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-09-15 01:22:39,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:39,138 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-09-15 01:22:39,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:22:39,139 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:22:39,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:39,140 INFO L225 Difference]: With dead ends: 139 [2020-09-15 01:22:39,140 INFO L226 Difference]: Without dead ends: 133 [2020-09-15 01:22:39,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:22:39,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-15 01:22:39,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-09-15 01:22:39,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-15 01:22:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-09-15 01:22:39,142 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-09-15 01:22:39,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:39,143 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-09-15 01:22:39,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:39,143 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-09-15 01:22:39,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:39,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:39,143 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:39,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:39,344 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:39,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:39,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-09-15 01:22:39,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:39,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935577805] [2020-09-15 01:22:39,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:39,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935577805] [2020-09-15 01:22:39,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717420708] [2020-09-15 01:22:39,802 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 [2020-09-15 01:22:39,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:22:39,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:39,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:39,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:39,905 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:39,921 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:39,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:39,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:22:39,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578212819] [2020-09-15 01:22:39,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:22:39,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:39,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:22:39,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:22:39,923 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-09-15 01:22:41,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:41,005 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-09-15 01:22:41,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:22:41,006 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:22:41,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:41,006 INFO L225 Difference]: With dead ends: 136 [2020-09-15 01:22:41,006 INFO L226 Difference]: Without dead ends: 130 [2020-09-15 01:22:41,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:22:41,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-15 01:22:41,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-09-15 01:22:41,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-15 01:22:41,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-09-15 01:22:41,008 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-09-15 01:22:41,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:41,008 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-09-15 01:22:41,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:22:41,008 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-09-15 01:22:41,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:41,009 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:41,009 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:41,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-09-15 01:22:41,209 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:41,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:41,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-09-15 01:22:41,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:41,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743664407] [2020-09-15 01:22:41,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:41,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:41,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743664407] [2020-09-15 01:22:41,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845744387] [2020-09-15 01:22:41,636 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 [2020-09-15 01:22:41,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-15 01:22:41,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:41,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:41,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:41,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:41,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:22:41,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235035491] [2020-09-15 01:22:41,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:41,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:41,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:41,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:41,735 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-09-15 01:22:42,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:42,754 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-09-15 01:22:42,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:22:42,755 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:22:42,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:42,756 INFO L225 Difference]: With dead ends: 137 [2020-09-15 01:22:42,756 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 01:22:42,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 01:22:42,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 01:22:42,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-09-15 01:22:42,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-15 01:22:42,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-09-15 01:22:42,759 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-09-15 01:22:42,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:42,760 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-09-15 01:22:42,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:42,760 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-09-15 01:22:42,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:42,760 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:42,760 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:42,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:42,961 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:42,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:42,961 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-09-15 01:22:42,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:42,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273110263] [2020-09-15 01:22:42,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:43,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273110263] [2020-09-15 01:22:43,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857391186] [2020-09-15 01:22:43,402 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 [2020-09-15 01:22:43,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 01:22:43,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:43,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:43,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:43,511 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:43,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:43,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:22:43,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520790892] [2020-09-15 01:22:43,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:22:43,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:43,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:22:43,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:22:43,529 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-09-15 01:22:44,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:44,707 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-09-15 01:22:44,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:22:44,707 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:22:44,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:44,708 INFO L225 Difference]: With dead ends: 134 [2020-09-15 01:22:44,708 INFO L226 Difference]: Without dead ends: 128 [2020-09-15 01:22:44,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 01:22:44,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-15 01:22:44,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-09-15 01:22:44,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-15 01:22:44,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-09-15 01:22:44,711 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-09-15 01:22:44,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:44,712 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-09-15 01:22:44,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:22:44,713 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-09-15 01:22:44,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:44,713 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:44,713 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:44,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-09-15 01:22:44,918 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:44,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:44,919 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-09-15 01:22:44,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:44,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782711080] [2020-09-15 01:22:44,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:44,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:45,342 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:45,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782711080] [2020-09-15 01:22:45,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560101105] [2020-09-15 01:22:45,343 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 [2020-09-15 01:22:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:45,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:45,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:45,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:45,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:22:45,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711393081] [2020-09-15 01:22:45,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:45,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:45,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:45,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:45,434 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-09-15 01:22:46,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:46,551 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-09-15 01:22:46,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:22:46,552 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:22:46,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:46,553 INFO L225 Difference]: With dead ends: 135 [2020-09-15 01:22:46,553 INFO L226 Difference]: Without dead ends: 129 [2020-09-15 01:22:46,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 01:22:46,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-15 01:22:46,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-09-15 01:22:46,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:22:46,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-09-15 01:22:46,556 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-09-15 01:22:46,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:46,557 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-09-15 01:22:46,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:46,557 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-09-15 01:22:46,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:46,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:46,557 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:46,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:46,758 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:46,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:46,759 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-09-15 01:22:46,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:46,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916736661] [2020-09-15 01:22:46,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:47,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916736661] [2020-09-15 01:22:47,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117090539] [2020-09-15 01:22:47,188 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 [2020-09-15 01:22:47,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:22:47,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:47,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:47,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:47,287 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:47,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:47,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:22:47,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056815931] [2020-09-15 01:22:47,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:22:47,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:47,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:22:47,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:22:47,307 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-09-15 01:22:48,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:48,665 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-09-15 01:22:48,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:22:48,666 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:22:48,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:48,666 INFO L225 Difference]: With dead ends: 132 [2020-09-15 01:22:48,666 INFO L226 Difference]: Without dead ends: 126 [2020-09-15 01:22:48,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-09-15 01:22:48,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-15 01:22:48,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-09-15 01:22:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:22:48,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-09-15 01:22:48,669 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-09-15 01:22:48,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:48,669 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-09-15 01:22:48,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:22:48,669 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-09-15 01:22:48,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:48,670 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:48,670 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:48,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:48,870 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:48,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:48,871 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-09-15 01:22:48,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:48,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040381119] [2020-09-15 01:22:48,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:49,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040381119] [2020-09-15 01:22:49,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277175724] [2020-09-15 01:22:49,274 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 [2020-09-15 01:22:49,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-15 01:22:49,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:49,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:49,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:49,369 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:49,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:49,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:22:49,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198540225] [2020-09-15 01:22:49,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:49,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:49,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:49,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:49,370 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-09-15 01:22:50,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:50,605 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-09-15 01:22:50,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:22:50,606 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:22:50,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:50,606 INFO L225 Difference]: With dead ends: 133 [2020-09-15 01:22:50,607 INFO L226 Difference]: Without dead ends: 127 [2020-09-15 01:22:50,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 01:22:50,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-15 01:22:50,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-09-15 01:22:50,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-15 01:22:50,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-09-15 01:22:50,609 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-09-15 01:22:50,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:50,609 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-09-15 01:22:50,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:50,610 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-09-15 01:22:50,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:50,610 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:50,610 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:50,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:50,811 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:50,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:50,811 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-09-15 01:22:50,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:50,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042043638] [2020-09-15 01:22:50,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:51,221 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:51,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042043638] [2020-09-15 01:22:51,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179084576] [2020-09-15 01:22:51,221 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 [2020-09-15 01:22:51,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:22:51,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:51,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:51,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:51,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:51,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:51,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:22:51,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451287399] [2020-09-15 01:22:51,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:22:51,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:51,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:22:51,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:22:51,350 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-09-15 01:22:52,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:52,816 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-09-15 01:22:52,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:22:52,818 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:22:52,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:52,818 INFO L225 Difference]: With dead ends: 130 [2020-09-15 01:22:52,818 INFO L226 Difference]: Without dead ends: 124 [2020-09-15 01:22:52,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 01:22:52,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-15 01:22:52,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-09-15 01:22:52,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 01:22:52,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-09-15 01:22:52,822 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-09-15 01:22:52,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:52,822 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-09-15 01:22:52,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:22:52,822 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-09-15 01:22:52,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:52,823 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:52,823 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:53,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:53,032 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:53,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:53,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-09-15 01:22:53,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:53,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813882774] [2020-09-15 01:22:53,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:53,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813882774] [2020-09-15 01:22:53,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202671272] [2020-09-15 01:22:53,439 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 [2020-09-15 01:22:53,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-15 01:22:53,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:53,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:53,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:53,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:53,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:22:53,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77260441] [2020-09-15 01:22:53,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:53,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:53,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:53,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:53,552 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-09-15 01:22:54,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:54,890 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-09-15 01:22:54,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:22:54,891 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:22:54,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:54,891 INFO L225 Difference]: With dead ends: 131 [2020-09-15 01:22:54,892 INFO L226 Difference]: Without dead ends: 125 [2020-09-15 01:22:54,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 01:22:54,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-15 01:22:54,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-09-15 01:22:54,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-15 01:22:54,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-09-15 01:22:54,895 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-09-15 01:22:54,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:54,895 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-09-15 01:22:54,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:54,895 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-09-15 01:22:54,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:54,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:54,896 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:55,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-09-15 01:22:55,104 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:55,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:55,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-09-15 01:22:55,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:55,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426752856] [2020-09-15 01:22:55,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:55,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426752856] [2020-09-15 01:22:55,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218740455] [2020-09-15 01:22:55,505 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 [2020-09-15 01:22:55,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 01:22:55,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:55,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:55,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:55,612 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:55,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:55,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:22:55,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131977672] [2020-09-15 01:22:55,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:22:55,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:55,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:22:55,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:22:55,635 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-09-15 01:22:57,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:57,239 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-09-15 01:22:57,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:22:57,240 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:22:57,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:57,241 INFO L225 Difference]: With dead ends: 128 [2020-09-15 01:22:57,241 INFO L226 Difference]: Without dead ends: 122 [2020-09-15 01:22:57,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 01:22:57,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-15 01:22:57,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-09-15 01:22:57,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-15 01:22:57,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-09-15 01:22:57,244 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-09-15 01:22:57,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:57,244 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-09-15 01:22:57,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:22:57,244 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-09-15 01:22:57,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:57,244 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:57,245 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:57,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-09-15 01:22:57,445 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:57,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:57,446 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-09-15 01:22:57,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:57,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021058968] [2020-09-15 01:22:57,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:57,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021058968] [2020-09-15 01:22:57,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502009243] [2020-09-15 01:22:57,837 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 [2020-09-15 01:22:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:57,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:57,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:57,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:57,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:22:57,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141894222] [2020-09-15 01:22:57,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:57,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:57,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:57,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:57,941 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-09-15 01:22:59,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:59,434 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-09-15 01:22:59,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:22:59,435 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:22:59,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:59,436 INFO L225 Difference]: With dead ends: 129 [2020-09-15 01:22:59,436 INFO L226 Difference]: Without dead ends: 123 [2020-09-15 01:22:59,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-09-15 01:22:59,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-15 01:22:59,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-09-15 01:22:59,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:22:59,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:22:59,438 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-09-15 01:22:59,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:59,438 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:22:59,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:59,438 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:22:59,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:59,439 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:59,439 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:59,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-09-15 01:22:59,639 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:59,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:59,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-09-15 01:22:59,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:59,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110353714] [2020-09-15 01:22:59,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:00,039 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:00,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110353714] [2020-09-15 01:23:00,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721025838] [2020-09-15 01:23:00,040 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 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 [2020-09-15 01:23:00,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:23:00,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:00,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:23:00,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:00,141 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:23:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:00,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:00,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:23:00,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799222495] [2020-09-15 01:23:00,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:00,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:00,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:00,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:00,166 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-09-15 01:23:01,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:01,912 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-09-15 01:23:01,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:23:01,914 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:23:01,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:01,914 INFO L225 Difference]: With dead ends: 126 [2020-09-15 01:23:01,914 INFO L226 Difference]: Without dead ends: 120 [2020-09-15 01:23:01,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-09-15 01:23:01,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-15 01:23:01,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-09-15 01:23:01,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:23:01,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:23:01,917 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-09-15 01:23:01,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:01,918 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:23:01,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:01,918 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:23:01,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:23:01,918 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:01,918 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:02,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-09-15 01:23:02,119 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:02,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:02,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-09-15 01:23:02,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:02,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702408789] [2020-09-15 01:23:02,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:02,513 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:02,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702408789] [2020-09-15 01:23:02,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51290054] [2020-09-15 01:23:02,513 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 [2020-09-15 01:23:02,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-15 01:23:02,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:02,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:23:02,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:02,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:02,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:23:02,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630360619] [2020-09-15 01:23:02,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:23:02,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:02,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:23:02,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:23:02,627 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-09-15 01:23:04,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:04,131 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-09-15 01:23:04,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-15 01:23:04,132 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:23:04,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:04,133 INFO L225 Difference]: With dead ends: 127 [2020-09-15 01:23:04,133 INFO L226 Difference]: Without dead ends: 121 [2020-09-15 01:23:04,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 01:23:04,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-15 01:23:04,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-09-15 01:23:04,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-15 01:23:04,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-09-15 01:23:04,135 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-09-15 01:23:04,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:04,135 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-09-15 01:23:04,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:23:04,135 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-09-15 01:23:04,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:23:04,135 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:04,136 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:04,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:04,336 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:04,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:04,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-09-15 01:23:04,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:04,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386575001] [2020-09-15 01:23:04,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:04,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386575001] [2020-09-15 01:23:04,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800123648] [2020-09-15 01:23:04,733 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 [2020-09-15 01:23:04,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:23:04,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:04,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:23:04,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:04,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:23:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:04,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:04,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:23:04,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929705434] [2020-09-15 01:23:04,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:04,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:04,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:04,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:04,864 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-09-15 01:23:06,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:06,754 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-09-15 01:23:06,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 01:23:06,755 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:23:06,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:06,756 INFO L225 Difference]: With dead ends: 124 [2020-09-15 01:23:06,756 INFO L226 Difference]: Without dead ends: 118 [2020-09-15 01:23:06,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 01:23:06,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-15 01:23:06,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-09-15 01:23:06,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-15 01:23:06,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-15 01:23:06,758 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-09-15 01:23:06,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:06,759 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-15 01:23:06,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:06,759 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-15 01:23:06,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:23:06,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:06,759 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:06,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-09-15 01:23:06,962 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:06,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:06,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-09-15 01:23:06,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:06,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283452694] [2020-09-15 01:23:06,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:07,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283452694] [2020-09-15 01:23:07,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130628233] [2020-09-15 01:23:07,354 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 [2020-09-15 01:23:07,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-15 01:23:07,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:07,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:23:07,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:07,455 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:07,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:07,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:23:07,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117154541] [2020-09-15 01:23:07,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:23:07,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:07,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:23:07,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:23:07,457 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-09-15 01:23:09,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:09,041 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-09-15 01:23:09,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-15 01:23:09,042 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:23:09,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:09,042 INFO L225 Difference]: With dead ends: 144 [2020-09-15 01:23:09,042 INFO L226 Difference]: Without dead ends: 138 [2020-09-15 01:23:09,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-09-15 01:23:09,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-15 01:23:09,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-09-15 01:23:09,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-15 01:23:09,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-09-15 01:23:09,045 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-09-15 01:23:09,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:09,046 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-09-15 01:23:09,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:23:09,046 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-09-15 01:23:09,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:23:09,046 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:09,046 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:09,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:09,248 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:09,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:09,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-09-15 01:23:09,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:09,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839872186] [2020-09-15 01:23:09,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:09,630 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:09,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839872186] [2020-09-15 01:23:09,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065594493] [2020-09-15 01:23:09,630 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 [2020-09-15 01:23:09,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 01:23:09,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:09,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:09,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:09,769 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:09,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:09,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:23:09,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93459231] [2020-09-15 01:23:09,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:09,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:09,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:09,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:09,771 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-09-15 01:23:11,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:11,616 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-09-15 01:23:11,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 01:23:11,617 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:23:11,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:11,617 INFO L225 Difference]: With dead ends: 125 [2020-09-15 01:23:11,618 INFO L226 Difference]: Without dead ends: 117 [2020-09-15 01:23:11,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1106, Invalid=2800, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 01:23:11,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-15 01:23:11,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-09-15 01:23:11,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-15 01:23:11,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-09-15 01:23:11,620 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-09-15 01:23:11,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:11,620 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-09-15 01:23:11,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:11,620 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-09-15 01:23:11,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:11,620 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:11,620 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:11,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-09-15 01:23:11,821 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:11,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:11,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-09-15 01:23:11,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:11,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518781776] [2020-09-15 01:23:11,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:12,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518781776] [2020-09-15 01:23:12,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440801779] [2020-09-15 01:23:12,367 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 [2020-09-15 01:23:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:12,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:12,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:12,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:12,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:23:12,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866146145] [2020-09-15 01:23:12,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:12,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:12,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:12,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:12,462 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-09-15 01:23:13,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:13,357 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-09-15 01:23:13,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:23:13,359 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:23:13,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:13,359 INFO L225 Difference]: With dead ends: 144 [2020-09-15 01:23:13,359 INFO L226 Difference]: Without dead ends: 138 [2020-09-15 01:23:13,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:23:13,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-15 01:23:13,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-09-15 01:23:13,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:23:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:23:13,363 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:23:13,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:13,363 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:23:13,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:13,363 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:23:13,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:13,363 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:13,364 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:13,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:13,568 INFO L427 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:13,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:13,569 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-09-15 01:23:13,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:13,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441421337] [2020-09-15 01:23:13,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:14,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441421337] [2020-09-15 01:23:14,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996909006] [2020-09-15 01:23:14,131 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 [2020-09-15 01:23:14,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:23:14,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:14,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:14,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:14,233 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:23:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:14,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:14,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:23:14,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257527799] [2020-09-15 01:23:14,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:23:14,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:14,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:23:14,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:23:14,247 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:23:15,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:15,288 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-09-15 01:23:15,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:23:15,290 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:23:15,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:15,290 INFO L225 Difference]: With dead ends: 141 [2020-09-15 01:23:15,290 INFO L226 Difference]: Without dead ends: 135 [2020-09-15 01:23:15,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:23:15,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-15 01:23:15,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-09-15 01:23:15,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:23:15,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:23:15,293 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:23:15,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:15,294 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:23:15,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:23:15,294 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:23:15,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:15,294 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:15,294 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:15,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2020-09-15 01:23:15,501 INFO L427 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:15,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:15,502 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-09-15 01:23:15,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:15,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619096252] [2020-09-15 01:23:15,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:16,019 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:16,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619096252] [2020-09-15 01:23:16,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737909160] [2020-09-15 01:23:16,020 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 [2020-09-15 01:23:16,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-15 01:23:16,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:16,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:16,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:16,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:16,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:23:16,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128421443] [2020-09-15 01:23:16,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:16,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:16,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:16,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:16,110 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:23:17,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:17,111 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-09-15 01:23:17,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:23:17,113 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:23:17,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:17,113 INFO L225 Difference]: With dead ends: 138 [2020-09-15 01:23:17,113 INFO L226 Difference]: Without dead ends: 132 [2020-09-15 01:23:17,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 01:23:17,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-15 01:23:17,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-09-15 01:23:17,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:23:17,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:23:17,116 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:23:17,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:17,116 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:23:17,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:17,116 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:23:17,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:17,117 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:17,117 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:17,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:17,318 INFO L427 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:17,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:17,318 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-09-15 01:23:17,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:17,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060963808] [2020-09-15 01:23:17,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:17,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060963808] [2020-09-15 01:23:17,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763988861] [2020-09-15 01:23:17,837 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 [2020-09-15 01:23:17,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:23:17,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:17,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:17,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:17,937 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:23:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:17,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:17,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:23:17,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116119852] [2020-09-15 01:23:17,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:23:17,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:17,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:23:17,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:23:17,956 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:23:19,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:19,141 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-09-15 01:23:19,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:23:19,151 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:23:19,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:19,152 INFO L225 Difference]: With dead ends: 137 [2020-09-15 01:23:19,152 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 01:23:19,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 01:23:19,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 01:23:19,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-09-15 01:23:19,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:23:19,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:23:19,153 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:23:19,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:19,154 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:23:19,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:23:19,154 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:23:19,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:19,154 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:19,154 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:19,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-09-15 01:23:19,355 INFO L427 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:19,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:19,355 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-09-15 01:23:19,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:19,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403699156] [2020-09-15 01:23:19,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:19,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403699156] [2020-09-15 01:23:19,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042900031] [2020-09-15 01:23:19,858 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 [2020-09-15 01:23:19,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-15 01:23:19,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:19,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:19,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:19,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:19,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:23:19,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452875981] [2020-09-15 01:23:19,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:19,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:19,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:19,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:19,954 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:23:21,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:21,063 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-09-15 01:23:21,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:23:21,065 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:23:21,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:21,065 INFO L225 Difference]: With dead ends: 134 [2020-09-15 01:23:21,065 INFO L226 Difference]: Without dead ends: 128 [2020-09-15 01:23:21,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:23:21,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-15 01:23:21,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-09-15 01:23:21,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:23:21,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:23:21,068 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:23:21,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:21,069 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:23:21,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:21,069 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:23:21,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:21,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:21,069 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:21,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-09-15 01:23:21,278 INFO L427 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:21,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:21,279 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-09-15 01:23:21,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:21,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546955507] [2020-09-15 01:23:21,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:21,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546955507] [2020-09-15 01:23:21,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413483750] [2020-09-15 01:23:21,792 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 [2020-09-15 01:23:21,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 01:23:21,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:21,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:21,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:21,898 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:23:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:21,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:21,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:23:21,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607173483] [2020-09-15 01:23:21,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:23:21,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:21,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:23:21,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:23:21,918 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:23:23,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:23,270 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-09-15 01:23:23,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:23:23,271 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:23:23,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:23,271 INFO L225 Difference]: With dead ends: 133 [2020-09-15 01:23:23,272 INFO L226 Difference]: Without dead ends: 127 [2020-09-15 01:23:23,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 01:23:23,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-15 01:23:23,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-09-15 01:23:23,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:23:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:23:23,275 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:23:23,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:23,275 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:23:23,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:23:23,275 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:23:23,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:23,276 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:23,276 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:23,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-09-15 01:23:23,480 INFO L427 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:23,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:23,481 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-09-15 01:23:23,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:23,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255755542] [2020-09-15 01:23:23,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:23,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255755542] [2020-09-15 01:23:23,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889866970] [2020-09-15 01:23:23,968 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 [2020-09-15 01:23:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:24,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:24,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:24,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:24,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:23:24,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686302428] [2020-09-15 01:23:24,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:24,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:24,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:24,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:24,057 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:23:25,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:25,258 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-09-15 01:23:25,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:23:25,259 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:23:25,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:25,260 INFO L225 Difference]: With dead ends: 130 [2020-09-15 01:23:25,260 INFO L226 Difference]: Without dead ends: 124 [2020-09-15 01:23:25,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 01:23:25,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-15 01:23:25,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-09-15 01:23:25,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:23:25,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:23:25,263 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:23:25,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:25,264 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:23:25,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:25,264 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:23:25,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:25,264 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:25,264 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:25,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:25,465 INFO L427 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:25,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:25,466 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-09-15 01:23:25,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:25,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201172615] [2020-09-15 01:23:25,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:25,954 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:25,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201172615] [2020-09-15 01:23:25,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576887780] [2020-09-15 01:23:25,955 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 [2020-09-15 01:23:26,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:23:26,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:26,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:26,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:26,065 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:23:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:26,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:26,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:23:26,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652177769] [2020-09-15 01:23:26,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:23:26,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:26,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:23:26,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:23:26,085 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:23:27,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:27,516 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-09-15 01:23:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:23:27,518 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:23:27,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:27,518 INFO L225 Difference]: With dead ends: 129 [2020-09-15 01:23:27,519 INFO L226 Difference]: Without dead ends: 123 [2020-09-15 01:23:27,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 01:23:27,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-15 01:23:27,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-09-15 01:23:27,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:23:27,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:23:27,521 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:23:27,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:27,521 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:23:27,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:23:27,521 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:23:27,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:27,521 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:27,521 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:27,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-09-15 01:23:27,724 INFO L427 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:27,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:27,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-09-15 01:23:27,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:27,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892568738] [2020-09-15 01:23:27,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:28,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892568738] [2020-09-15 01:23:28,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132889817] [2020-09-15 01:23:28,186 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 [2020-09-15 01:23:28,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-15 01:23:28,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:28,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:28,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:28,285 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:28,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:28,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:23:28,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187629442] [2020-09-15 01:23:28,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:28,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:28,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:28,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:28,286 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:23:29,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:29,595 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-09-15 01:23:29,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:23:29,596 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:23:29,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:29,597 INFO L225 Difference]: With dead ends: 126 [2020-09-15 01:23:29,597 INFO L226 Difference]: Without dead ends: 120 [2020-09-15 01:23:29,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-09-15 01:23:29,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-15 01:23:29,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-09-15 01:23:29,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:23:29,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:23:29,600 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:23:29,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:29,600 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:23:29,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:29,600 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:23:29,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:29,601 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:29,601 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:29,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:29,801 INFO L427 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:29,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:29,802 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-09-15 01:23:29,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:29,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816117737] [2020-09-15 01:23:29,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:30,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816117737] [2020-09-15 01:23:30,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69300725] [2020-09-15 01:23:30,276 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 [2020-09-15 01:23:30,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:23:30,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:30,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:30,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:30,381 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:23:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:30,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:30,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:23:30,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987442078] [2020-09-15 01:23:30,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:23:30,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:30,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:23:30,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:23:30,401 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:23:32,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:32,010 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-09-15 01:23:32,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:23:32,011 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:23:32,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:32,012 INFO L225 Difference]: With dead ends: 125 [2020-09-15 01:23:32,012 INFO L226 Difference]: Without dead ends: 119 [2020-09-15 01:23:32,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 01:23:32,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-15 01:23:32,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-09-15 01:23:32,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:23:32,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:23:32,015 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:23:32,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:32,015 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:23:32,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:23:32,015 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:23:32,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:32,016 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:32,016 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:32,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-09-15 01:23:32,220 INFO L427 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:32,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:32,221 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-09-15 01:23:32,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:32,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758760433] [2020-09-15 01:23:32,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:32,679 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:32,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758760433] [2020-09-15 01:23:32,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298603321] [2020-09-15 01:23:32,679 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 [2020-09-15 01:23:32,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-15 01:23:32,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:32,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:32,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:32,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:32,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:23:32,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214758056] [2020-09-15 01:23:32,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:32,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:32,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:32,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:32,779 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:23:34,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:34,149 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-09-15 01:23:34,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:23:34,151 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:23:34,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:34,151 INFO L225 Difference]: With dead ends: 122 [2020-09-15 01:23:34,151 INFO L226 Difference]: Without dead ends: 116 [2020-09-15 01:23:34,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 01:23:34,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-15 01:23:34,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-09-15 01:23:34,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:23:34,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:23:34,155 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:23:34,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:34,155 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:23:34,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:34,155 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:23:34,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:34,155 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:34,155 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:34,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:34,356 INFO L427 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:34,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:34,357 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-09-15 01:23:34,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:34,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932088756] [2020-09-15 01:23:34,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:34,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932088756] [2020-09-15 01:23:34,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569774287] [2020-09-15 01:23:34,825 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 [2020-09-15 01:23:34,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 01:23:34,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:34,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:34,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:34,934 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:23:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:34,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:34,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:23:34,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780212229] [2020-09-15 01:23:34,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:23:34,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:34,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:23:34,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:23:34,957 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:23:36,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:36,704 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-09-15 01:23:36,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:23:36,706 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:23:36,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:36,706 INFO L225 Difference]: With dead ends: 121 [2020-09-15 01:23:36,707 INFO L226 Difference]: Without dead ends: 115 [2020-09-15 01:23:36,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-09-15 01:23:36,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-15 01:23:36,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-09-15 01:23:36,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:23:36,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:23:36,709 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:23:36,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:36,709 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:23:36,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:23:36,709 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:23:36,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:36,709 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:36,710 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:36,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-09-15 01:23:36,910 INFO L427 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:36,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:36,911 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-09-15 01:23:36,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:36,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447219720] [2020-09-15 01:23:36,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:37,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447219720] [2020-09-15 01:23:37,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870931102] [2020-09-15 01:23:37,357 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 [2020-09-15 01:23:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:37,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:37,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:37,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:37,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:23:37,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252677188] [2020-09-15 01:23:37,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:37,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:37,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:37,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:37,451 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:23:38,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:38,948 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-09-15 01:23:38,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:23:38,949 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:23:38,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:38,950 INFO L225 Difference]: With dead ends: 118 [2020-09-15 01:23:38,950 INFO L226 Difference]: Without dead ends: 112 [2020-09-15 01:23:38,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 01:23:38,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-15 01:23:38,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-09-15 01:23:38,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:23:38,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:23:38,953 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:23:38,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:38,953 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:23:38,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:38,953 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:23:38,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:38,953 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:38,953 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:39,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:39,154 INFO L427 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:39,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:39,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-09-15 01:23:39,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:39,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130425298] [2020-09-15 01:23:39,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:39,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130425298] [2020-09-15 01:23:39,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757045243] [2020-09-15 01:23:39,607 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 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 [2020-09-15 01:23:39,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:23:39,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:39,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:39,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:39,712 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:23:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:39,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:39,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:23:39,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030739236] [2020-09-15 01:23:39,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:23:39,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:39,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:23:39,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:23:39,740 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:23:41,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:41,664 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-09-15 01:23:41,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:23:41,665 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:23:41,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:41,666 INFO L225 Difference]: With dead ends: 117 [2020-09-15 01:23:41,666 INFO L226 Difference]: Without dead ends: 111 [2020-09-15 01:23:41,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 01:23:41,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-15 01:23:41,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-09-15 01:23:41,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:23:41,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:23:41,668 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:23:41,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:41,669 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:23:41,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:23:41,669 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:23:41,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:41,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:41,669 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:41,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:41,870 INFO L427 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:41,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:41,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-09-15 01:23:41,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:41,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261388715] [2020-09-15 01:23:41,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:42,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261388715] [2020-09-15 01:23:42,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397677466] [2020-09-15 01:23:42,309 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 [2020-09-15 01:23:42,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-15 01:23:42,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:42,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:42,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:42,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:42,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:23:42,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331968102] [2020-09-15 01:23:42,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:42,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:42,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:42,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:42,419 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:23:44,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:44,044 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-09-15 01:23:44,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:23:44,046 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:23:44,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:44,046 INFO L225 Difference]: With dead ends: 114 [2020-09-15 01:23:44,047 INFO L226 Difference]: Without dead ends: 108 [2020-09-15 01:23:44,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-09-15 01:23:44,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-15 01:23:44,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-09-15 01:23:44,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:23:44,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:23:44,050 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:23:44,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:44,051 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:23:44,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:44,051 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:23:44,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:44,051 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:44,051 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:44,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-09-15 01:23:44,252 INFO L427 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:44,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:44,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-09-15 01:23:44,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:44,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584462845] [2020-09-15 01:23:44,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:44,696 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:44,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584462845] [2020-09-15 01:23:44,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93921359] [2020-09-15 01:23:44,697 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 [2020-09-15 01:23:44,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:23:44,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:44,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:44,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:44,823 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:23:44,855 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:44,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:44,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:23:44,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037039673] [2020-09-15 01:23:44,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:23:44,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:44,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:23:44,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:23:44,857 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:23:46,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:46,910 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-09-15 01:23:46,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 01:23:46,912 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:23:46,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:46,912 INFO L225 Difference]: With dead ends: 113 [2020-09-15 01:23:46,912 INFO L226 Difference]: Without dead ends: 107 [2020-09-15 01:23:46,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1073, Invalid=2709, Unknown=0, NotChecked=0, Total=3782 [2020-09-15 01:23:46,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-15 01:23:46,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-09-15 01:23:46,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:23:46,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:23:46,915 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:23:46,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:46,916 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:23:46,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:23:46,916 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:23:46,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:46,916 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:46,916 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:47,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-09-15 01:23:47,117 INFO L427 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:47,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:47,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 233 times [2020-09-15 01:23:47,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:47,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188275427] [2020-09-15 01:23:47,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:47,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188275427] [2020-09-15 01:23:47,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680751868] [2020-09-15 01:23:47,560 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:47,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-15 01:23:47,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:47,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:47,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:47,667 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:47,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:47,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:23:47,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992928072] [2020-09-15 01:23:47,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:47,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:47,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:47,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:47,668 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:23:49,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:49,427 INFO L93 Difference]: Finished difference Result 110 states and 271 transitions. [2020-09-15 01:23:49,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-15 01:23:49,428 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:23:49,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:49,429 INFO L225 Difference]: With dead ends: 110 [2020-09-15 01:23:49,429 INFO L226 Difference]: Without dead ends: 104 [2020-09-15 01:23:49,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1091, Invalid=2569, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 01:23:49,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-15 01:23:49,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-09-15 01:23:49,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:23:49,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:23:49,431 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:23:49,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:49,431 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:23:49,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:49,431 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:23:49,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:49,432 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:49,432 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:49,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-09-15 01:23:49,633 INFO L427 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:49,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:49,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1583418990, now seen corresponding path program 234 times [2020-09-15 01:23:49,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:49,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811815064] [2020-09-15 01:23:49,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:50,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811815064] [2020-09-15 01:23:50,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411303242] [2020-09-15 01:23:50,075 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:50,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 01:23:50,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:50,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:50,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:50,189 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:23:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:50,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:50,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:23:50,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311829182] [2020-09-15 01:23:50,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:23:50,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:50,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:23:50,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:23:50,227 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:23:52,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:52,440 INFO L93 Difference]: Finished difference Result 109 states and 269 transitions. [2020-09-15 01:23:52,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 01:23:52,441 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:23:52,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:52,442 INFO L225 Difference]: With dead ends: 109 [2020-09-15 01:23:52,442 INFO L226 Difference]: Without dead ends: 103 [2020-09-15 01:23:52,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1197, Invalid=2835, Unknown=0, NotChecked=0, Total=4032 [2020-09-15 01:23:52,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-15 01:23:52,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-09-15 01:23:52,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:23:52,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:23:52,444 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:23:52,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:52,444 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:23:52,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:23:52,445 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:23:52,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:52,445 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:52,445 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:52,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-09-15 01:23:52,646 INFO L427 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:52,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:52,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 235 times [2020-09-15 01:23:52,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:52,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874806405] [2020-09-15 01:23:52,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:53,091 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:53,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874806405] [2020-09-15 01:23:53,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476185752] [2020-09-15 01:23:53,092 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:53,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:53,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:53,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:53,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:23:53,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43164393] [2020-09-15 01:23:53,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:53,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:53,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:53,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:53,199 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:23:55,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:55,009 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-09-15 01:23:55,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-15 01:23:55,011 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:23:55,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:55,011 INFO L225 Difference]: With dead ends: 125 [2020-09-15 01:23:55,012 INFO L226 Difference]: Without dead ends: 119 [2020-09-15 01:23:55,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1224, Invalid=2682, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 01:23:55,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-15 01:23:55,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2020-09-15 01:23:55,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-15 01:23:55,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 249 transitions. [2020-09-15 01:23:55,014 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 249 transitions. Word has length 28 [2020-09-15 01:23:55,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:55,015 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 249 transitions. [2020-09-15 01:23:55,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:55,015 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 249 transitions. [2020-09-15 01:23:55,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:55,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:55,015 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:55,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-09-15 01:23:55,216 INFO L427 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:55,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:55,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1583925840, now seen corresponding path program 236 times [2020-09-15 01:23:55,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:55,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363487938] [2020-09-15 01:23:55,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:55,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363487938] [2020-09-15 01:23:55,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944539538] [2020-09-15 01:23:55,656 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:55,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:23:55,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:55,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:23:55,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:55,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:55,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:23:55,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143235256] [2020-09-15 01:23:55,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:23:55,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:55,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:23:55,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:23:55,800 INFO L87 Difference]: Start difference. First operand 96 states and 249 transitions. Second operand 25 states. [2020-09-15 01:23:57,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:57,838 INFO L93 Difference]: Finished difference Result 104 states and 261 transitions. [2020-09-15 01:23:57,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 01:23:57,840 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:23:57,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:57,841 INFO L225 Difference]: With dead ends: 104 [2020-09-15 01:23:57,841 INFO L226 Difference]: Without dead ends: 96 [2020-09-15 01:23:57,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1121, Invalid=2911, Unknown=0, NotChecked=0, Total=4032 [2020-09-15 01:23:57,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-15 01:23:57,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 69. [2020-09-15 01:23:57,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 01:23:57,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 168 transitions. [2020-09-15 01:23:57,843 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 168 transitions. Word has length 28 [2020-09-15 01:23:57,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:57,843 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 168 transitions. [2020-09-15 01:23:57,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:23:57,844 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 168 transitions. [2020-09-15 01:23:57,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:57,844 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:57,844 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:58,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:58,045 INFO L427 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:58,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:58,045 INFO L82 PathProgramCache]: Analyzing trace with hash 234390510, now seen corresponding path program 237 times [2020-09-15 01:23:58,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:58,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869223850] [2020-09-15 01:23:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:58,498 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:58,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869223850] [2020-09-15 01:23:58,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712804002] [2020-09-15 01:23:58,499 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:58,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-15 01:23:58,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:58,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:58,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:58,610 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:23:58,643 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:58,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:58,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:23:58,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759554631] [2020-09-15 01:23:58,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:23:58,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:58,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:23:58,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:23:58,645 INFO L87 Difference]: Start difference. First operand 69 states and 168 transitions. Second operand 25 states. [2020-09-15 01:24:00,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:00,753 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-09-15 01:24:00,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-15 01:24:00,755 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:24:00,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:00,755 INFO L225 Difference]: With dead ends: 124 [2020-09-15 01:24:00,755 INFO L226 Difference]: Without dead ends: 119 [2020-09-15 01:24:00,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-09-15 01:24:00,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-15 01:24:00,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2020-09-15 01:24:00,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-15 01:24:00,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-09-15 01:24:00,762 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 28 [2020-09-15 01:24:00,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:00,762 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-09-15 01:24:00,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:00,763 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-09-15 01:24:00,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:00,763 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:00,763 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:00,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-09-15 01:24:00,964 INFO L427 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:00,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:00,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1857077091, now seen corresponding path program 238 times [2020-09-15 01:24:00,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:00,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580879323] [2020-09-15 01:24:00,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:01,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580879323] [2020-09-15 01:24:01,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061985581] [2020-09-15 01:24:01,433 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:01,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:24:01,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:01,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:01,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:01,546 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:24:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:01,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:01,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-15 01:24:01,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141891231] [2020-09-15 01:24:01,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:24:01,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:01,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:24:01,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:24:01,586 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 26 states. [2020-09-15 01:24:03,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:03,867 INFO L93 Difference]: Finished difference Result 102 states and 261 transitions. [2020-09-15 01:24:03,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-15 01:24:03,868 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 01:24:03,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:03,869 INFO L225 Difference]: With dead ends: 102 [2020-09-15 01:24:03,869 INFO L226 Difference]: Without dead ends: 97 [2020-09-15 01:24:03,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1409, Invalid=3013, Unknown=0, NotChecked=0, Total=4422 [2020-09-15 01:24:03,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-15 01:24:03,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2020-09-15 01:24:03,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 01:24:03,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2020-09-15 01:24:03,872 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 29 [2020-09-15 01:24:03,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:03,872 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2020-09-15 01:24:03,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:24:03,872 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2020-09-15 01:24:03,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:03,873 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:03,873 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:04,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:04,081 INFO L427 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:04,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:04,082 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 239 times [2020-09-15 01:24:04,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:04,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622869930] [2020-09-15 01:24:04,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:04,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622869930] [2020-09-15 01:24:04,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166776915] [2020-09-15 01:24:04,733 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:04,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-15 01:24:04,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:04,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:04,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:04,819 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:04,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:04,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 01:24:04,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224773588] [2020-09-15 01:24:04,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:24:04,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:04,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:24:04,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:24:04,820 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand 25 states. [2020-09-15 01:24:05,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:05,804 INFO L93 Difference]: Finished difference Result 108 states and 251 transitions. [2020-09-15 01:24:05,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:24:05,805 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-15 01:24:05,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:05,806 INFO L225 Difference]: With dead ends: 108 [2020-09-15 01:24:05,806 INFO L226 Difference]: Without dead ends: 102 [2020-09-15 01:24:05,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=663, Invalid=1407, Unknown=0, NotChecked=0, Total=2070 [2020-09-15 01:24:05,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-15 01:24:05,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 78. [2020-09-15 01:24:05,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-15 01:24:05,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-09-15 01:24:05,810 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 29 [2020-09-15 01:24:05,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:05,810 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-09-15 01:24:05,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:05,810 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-09-15 01:24:05,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:05,811 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:05,811 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:06,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:06,019 INFO L427 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:06,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:06,020 INFO L82 PathProgramCache]: Analyzing trace with hash -972903182, now seen corresponding path program 240 times [2020-09-15 01:24:06,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:06,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803715647] [2020-09-15 01:24:06,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:06,637 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:06,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803715647] [2020-09-15 01:24:06,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456382833] [2020-09-15 01:24:06,638 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:06,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-15 01:24:06,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:06,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:06,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:06,752 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:24:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:06,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:06,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-15 01:24:06,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361914920] [2020-09-15 01:24:06,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:24:06,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:06,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:24:06,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:24:06,767 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 26 states. [2020-09-15 01:24:07,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:07,847 INFO L93 Difference]: Finished difference Result 130 states and 295 transitions. [2020-09-15 01:24:07,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:24:07,849 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 01:24:07,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:07,849 INFO L225 Difference]: With dead ends: 130 [2020-09-15 01:24:07,850 INFO L226 Difference]: Without dead ends: 124 [2020-09-15 01:24:07,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=672, Invalid=1584, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:24:07,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-15 01:24:07,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 76. [2020-09-15 01:24:07,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-15 01:24:07,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 187 transitions. [2020-09-15 01:24:07,852 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 187 transitions. Word has length 29 [2020-09-15 01:24:07,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:07,852 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 187 transitions. [2020-09-15 01:24:07,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:24:07,852 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 187 transitions. [2020-09-15 01:24:07,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:07,853 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:07,853 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:08,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:08,053 INFO L427 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:08,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:08,054 INFO L82 PathProgramCache]: Analyzing trace with hash -558119952, now seen corresponding path program 241 times [2020-09-15 01:24:08,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:08,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170836757] [2020-09-15 01:24:08,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:08,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170836757] [2020-09-15 01:24:08,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9389450] [2020-09-15 01:24:08,664 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:08,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:08,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:08,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:08,747 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:08,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:08,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 01:24:08,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158238849] [2020-09-15 01:24:08,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:24:08,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:08,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:24:08,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:24:08,749 INFO L87 Difference]: Start difference. First operand 76 states and 187 transitions. Second operand 25 states. [2020-09-15 01:24:09,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:09,899 INFO L93 Difference]: Finished difference Result 131 states and 299 transitions. [2020-09-15 01:24:09,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:24:09,901 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-15 01:24:09,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:09,901 INFO L225 Difference]: With dead ends: 131 [2020-09-15 01:24:09,901 INFO L226 Difference]: Without dead ends: 125 [2020-09-15 01:24:09,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=674, Invalid=1678, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:24:09,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-15 01:24:09,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 79. [2020-09-15 01:24:09,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-15 01:24:09,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 195 transitions. [2020-09-15 01:24:09,904 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 195 transitions. Word has length 29 [2020-09-15 01:24:09,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:09,904 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 195 transitions. [2020-09-15 01:24:09,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:09,905 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 195 transitions. [2020-09-15 01:24:09,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:09,905 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:09,905 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:10,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:10,106 INFO L427 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:10,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:10,106 INFO L82 PathProgramCache]: Analyzing trace with hash 2015097940, now seen corresponding path program 242 times [2020-09-15 01:24:10,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:10,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492766269] [2020-09-15 01:24:10,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:10,732 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:10,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492766269] [2020-09-15 01:24:10,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194938743] [2020-09-15 01:24:10,733 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:10,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:24:10,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:10,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:10,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:10,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:24:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:10,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:10,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-15 01:24:10,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272449719] [2020-09-15 01:24:10,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:24:10,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:10,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:24:10,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:24:10,857 INFO L87 Difference]: Start difference. First operand 79 states and 195 transitions. Second operand 26 states. [2020-09-15 01:24:12,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:12,052 INFO L93 Difference]: Finished difference Result 149 states and 335 transitions. [2020-09-15 01:24:12,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:24:12,054 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 01:24:12,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:12,055 INFO L225 Difference]: With dead ends: 149 [2020-09-15 01:24:12,055 INFO L226 Difference]: Without dead ends: 143 [2020-09-15 01:24:12,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=712, Invalid=1838, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 01:24:12,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-15 01:24:12,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 78. [2020-09-15 01:24:12,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-15 01:24:12,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 193 transitions. [2020-09-15 01:24:12,058 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 193 transitions. Word has length 29 [2020-09-15 01:24:12,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:12,058 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 193 transitions. [2020-09-15 01:24:12,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:24:12,058 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 193 transitions. [2020-09-15 01:24:12,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:12,058 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:12,058 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:12,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-09-15 01:24:12,259 INFO L427 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:12,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:12,260 INFO L82 PathProgramCache]: Analyzing trace with hash 831173330, now seen corresponding path program 243 times [2020-09-15 01:24:12,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:12,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359854910] [2020-09-15 01:24:12,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:12,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359854910] [2020-09-15 01:24:12,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085613917] [2020-09-15 01:24:12,847 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:12,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-15 01:24:12,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:12,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:12,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:12,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:12,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 01:24:12,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238531376] [2020-09-15 01:24:12,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:24:12,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:12,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:24:12,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:24:12,942 INFO L87 Difference]: Start difference. First operand 78 states and 193 transitions. Second operand 25 states. [2020-09-15 01:24:14,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:14,175 INFO L93 Difference]: Finished difference Result 149 states and 337 transitions. [2020-09-15 01:24:14,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:24:14,176 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-15 01:24:14,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:14,176 INFO L225 Difference]: With dead ends: 149 [2020-09-15 01:24:14,176 INFO L226 Difference]: Without dead ends: 143 [2020-09-15 01:24:14,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=728, Invalid=1924, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 01:24:14,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-15 01:24:14,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 81. [2020-09-15 01:24:14,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:24:14,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 201 transitions. [2020-09-15 01:24:14,178 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 201 transitions. Word has length 29 [2020-09-15 01:24:14,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:14,179 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 201 transitions. [2020-09-15 01:24:14,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:14,179 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 201 transitions. [2020-09-15 01:24:14,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:14,179 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:14,179 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:14,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2020-09-15 01:24:14,380 INFO L427 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:14,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:14,380 INFO L82 PathProgramCache]: Analyzing trace with hash -716985290, now seen corresponding path program 244 times [2020-09-15 01:24:14,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:14,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376886805] [2020-09-15 01:24:14,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:14,972 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:14,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376886805] [2020-09-15 01:24:14,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940744578] [2020-09-15 01:24:14,973 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:15,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:24:15,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:15,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:15,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:15,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:24:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:15,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:15,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-15 01:24:15,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093626077] [2020-09-15 01:24:15,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:24:15,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:15,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:24:15,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:24:15,100 INFO L87 Difference]: Start difference. First operand 81 states and 201 transitions. Second operand 26 states. [2020-09-15 01:24:16,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:16,497 INFO L93 Difference]: Finished difference Result 146 states and 331 transitions. [2020-09-15 01:24:16,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:24:16,498 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 01:24:16,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:16,499 INFO L225 Difference]: With dead ends: 146 [2020-09-15 01:24:16,499 INFO L226 Difference]: Without dead ends: 140 [2020-09-15 01:24:16,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=731, Invalid=2025, Unknown=0, NotChecked=0, Total=2756 [2020-09-15 01:24:16,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-15 01:24:16,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 80. [2020-09-15 01:24:16,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:24:16,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 199 transitions. [2020-09-15 01:24:16,502 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 199 transitions. Word has length 29 [2020-09-15 01:24:16,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:16,502 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 199 transitions. [2020-09-15 01:24:16,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:24:16,502 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 199 transitions. [2020-09-15 01:24:16,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:16,503 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:16,503 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:16,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-09-15 01:24:16,707 INFO L427 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:16,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:16,708 INFO L82 PathProgramCache]: Analyzing trace with hash -2018774476, now seen corresponding path program 245 times [2020-09-15 01:24:16,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:16,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940178375] [2020-09-15 01:24:16,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:17,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940178375] [2020-09-15 01:24:17,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712084929] [2020-09-15 01:24:17,272 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:17,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-15 01:24:17,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:17,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:17,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:17,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:17,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 01:24:17,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409934547] [2020-09-15 01:24:17,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:24:17,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:17,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:24:17,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:24:17,368 INFO L87 Difference]: Start difference. First operand 80 states and 199 transitions. Second operand 25 states. [2020-09-15 01:24:18,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:18,716 INFO L93 Difference]: Finished difference Result 147 states and 335 transitions. [2020-09-15 01:24:18,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:24:18,717 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-15 01:24:18,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:18,717 INFO L225 Difference]: With dead ends: 147 [2020-09-15 01:24:18,717 INFO L226 Difference]: Without dead ends: 141 [2020-09-15 01:24:18,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=762, Invalid=2100, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 01:24:18,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-15 01:24:18,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 83. [2020-09-15 01:24:18,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-15 01:24:18,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 207 transitions. [2020-09-15 01:24:18,720 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 207 transitions. Word has length 29 [2020-09-15 01:24:18,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:18,720 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 207 transitions. [2020-09-15 01:24:18,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:18,720 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 207 transitions. [2020-09-15 01:24:18,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:18,720 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:18,721 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:18,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-09-15 01:24:18,921 INFO L427 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:18,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:18,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1465644184, now seen corresponding path program 246 times [2020-09-15 01:24:18,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:18,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481377981] [2020-09-15 01:24:18,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:19,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481377981] [2020-09-15 01:24:19,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936698990] [2020-09-15 01:24:19,485 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:19,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-15 01:24:19,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:19,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:19,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:19,615 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:24:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:19,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:19,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-15 01:24:19,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075360499] [2020-09-15 01:24:19,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:24:19,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:19,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:24:19,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:24:19,636 INFO L87 Difference]: Start difference. First operand 83 states and 207 transitions. Second operand 26 states. [2020-09-15 01:24:21,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:21,168 INFO L93 Difference]: Finished difference Result 144 states and 329 transitions. [2020-09-15 01:24:21,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:24:21,169 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 01:24:21,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:21,169 INFO L225 Difference]: With dead ends: 144 [2020-09-15 01:24:21,169 INFO L226 Difference]: Without dead ends: 138 [2020-09-15 01:24:21,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=766, Invalid=2204, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 01:24:21,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-15 01:24:21,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 82. [2020-09-15 01:24:21,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 01:24:21,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 205 transitions. [2020-09-15 01:24:21,172 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 205 transitions. Word has length 29 [2020-09-15 01:24:21,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:21,172 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 205 transitions. [2020-09-15 01:24:21,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:24:21,172 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 205 transitions. [2020-09-15 01:24:21,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:21,172 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:21,172 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:21,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:21,373 INFO L427 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:21,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:21,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1517920790, now seen corresponding path program 247 times [2020-09-15 01:24:21,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:21,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224397238] [2020-09-15 01:24:21,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:21,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224397238] [2020-09-15 01:24:21,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620857184] [2020-09-15 01:24:21,927 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:21,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:21,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:22,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:22,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 01:24:22,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465141521] [2020-09-15 01:24:22,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:24:22,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:22,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:24:22,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:24:22,023 INFO L87 Difference]: Start difference. First operand 82 states and 205 transitions. Second operand 25 states. [2020-09-15 01:24:23,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:23,476 INFO L93 Difference]: Finished difference Result 145 states and 333 transitions. [2020-09-15 01:24:23,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:24:23,478 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-15 01:24:23,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:23,478 INFO L225 Difference]: With dead ends: 145 [2020-09-15 01:24:23,478 INFO L226 Difference]: Without dead ends: 139 [2020-09-15 01:24:23,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=812, Invalid=2268, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 01:24:23,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-15 01:24:23,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 85. [2020-09-15 01:24:23,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-15 01:24:23,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 213 transitions. [2020-09-15 01:24:23,481 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 213 transitions. Word has length 29 [2020-09-15 01:24:23,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:23,481 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 213 transitions. [2020-09-15 01:24:23,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:23,482 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 213 transitions. [2020-09-15 01:24:23,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:23,482 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:23,482 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:23,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2020-09-15 01:24:23,691 INFO L427 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:23,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:23,691 INFO L82 PathProgramCache]: Analyzing trace with hash -900797062, now seen corresponding path program 248 times [2020-09-15 01:24:23,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:23,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261292427] [2020-09-15 01:24:23,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:24,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261292427] [2020-09-15 01:24:24,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426502802] [2020-09-15 01:24:24,260 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:24,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:24:24,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:24,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:24,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:24,376 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:24:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:24,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:24,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-15 01:24:24,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096856860] [2020-09-15 01:24:24,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:24:24,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:24,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:24:24,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:24:24,397 INFO L87 Difference]: Start difference. First operand 85 states and 213 transitions. Second operand 26 states. [2020-09-15 01:24:26,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:26,055 INFO L93 Difference]: Finished difference Result 142 states and 327 transitions. [2020-09-15 01:24:26,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:24:26,056 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 01:24:26,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:26,056 INFO L225 Difference]: With dead ends: 142 [2020-09-15 01:24:26,056 INFO L226 Difference]: Without dead ends: 136 [2020-09-15 01:24:26,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=817, Invalid=2375, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 01:24:26,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-15 01:24:26,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-09-15 01:24:26,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-15 01:24:26,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 211 transitions. [2020-09-15 01:24:26,059 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 211 transitions. Word has length 29 [2020-09-15 01:24:26,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:26,059 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 211 transitions. [2020-09-15 01:24:26,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:24:26,059 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 211 transitions. [2020-09-15 01:24:26,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:26,060 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:26,060 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:26,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:26,261 INFO L427 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:26,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:26,261 INFO L82 PathProgramCache]: Analyzing trace with hash -212475272, now seen corresponding path program 249 times [2020-09-15 01:24:26,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:26,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188943510] [2020-09-15 01:24:26,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:26,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188943510] [2020-09-15 01:24:26,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312009701] [2020-09-15 01:24:26,789 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:26,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-15 01:24:26,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:26,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:26,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:26,902 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:26,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:26,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 01:24:26,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892938223] [2020-09-15 01:24:26,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:24:26,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:26,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:24:26,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:24:26,904 INFO L87 Difference]: Start difference. First operand 84 states and 211 transitions. Second operand 25 states. [2020-09-15 01:24:28,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:28,429 INFO L93 Difference]: Finished difference Result 143 states and 331 transitions. [2020-09-15 01:24:28,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:24:28,430 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-15 01:24:28,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:28,430 INFO L225 Difference]: With dead ends: 143 [2020-09-15 01:24:28,430 INFO L226 Difference]: Without dead ends: 137 [2020-09-15 01:24:28,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=878, Invalid=2428, Unknown=0, NotChecked=0, Total=3306 [2020-09-15 01:24:28,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-15 01:24:28,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 87. [2020-09-15 01:24:28,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:24:28,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 219 transitions. [2020-09-15 01:24:28,433 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 219 transitions. Word has length 29 [2020-09-15 01:24:28,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:28,433 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 219 transitions. [2020-09-15 01:24:28,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:28,434 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 219 transitions. [2020-09-15 01:24:28,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:28,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:28,434 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:28,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:28,635 INFO L427 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:28,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:28,635 INFO L82 PathProgramCache]: Analyzing trace with hash 772716252, now seen corresponding path program 250 times [2020-09-15 01:24:28,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:28,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568865641] [2020-09-15 01:24:28,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:29,155 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:29,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568865641] [2020-09-15 01:24:29,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400381463] [2020-09-15 01:24:29,156 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:29,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:24:29,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:29,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:29,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:29,266 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:24:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:29,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:29,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-15 01:24:29,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785020788] [2020-09-15 01:24:29,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:24:29,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:29,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:24:29,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:24:29,299 INFO L87 Difference]: Start difference. First operand 87 states and 219 transitions. Second operand 26 states. [2020-09-15 01:24:31,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:31,083 INFO L93 Difference]: Finished difference Result 140 states and 325 transitions. [2020-09-15 01:24:31,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:24:31,085 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 01:24:31,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:31,086 INFO L225 Difference]: With dead ends: 140 [2020-09-15 01:24:31,086 INFO L226 Difference]: Without dead ends: 134 [2020-09-15 01:24:31,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=884, Invalid=2538, Unknown=0, NotChecked=0, Total=3422 [2020-09-15 01:24:31,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-15 01:24:31,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 86. [2020-09-15 01:24:31,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:24:31,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 217 transitions. [2020-09-15 01:24:31,089 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 217 transitions. Word has length 29 [2020-09-15 01:24:31,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:31,089 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 217 transitions. [2020-09-15 01:24:31,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:24:31,089 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 217 transitions. [2020-09-15 01:24:31,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:31,090 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:31,090 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:31,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:31,291 INFO L427 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:31,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:31,291 INFO L82 PathProgramCache]: Analyzing trace with hash -844442790, now seen corresponding path program 251 times [2020-09-15 01:24:31,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:31,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199566179] [2020-09-15 01:24:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:31,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199566179] [2020-09-15 01:24:31,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26020994] [2020-09-15 01:24:31,816 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:31,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-15 01:24:31,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:31,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:31,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:31,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:31,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 01:24:31,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439848238] [2020-09-15 01:24:31,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:24:31,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:31,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:24:31,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:24:31,938 INFO L87 Difference]: Start difference. First operand 86 states and 217 transitions. Second operand 25 states. [2020-09-15 01:24:33,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:33,603 INFO L93 Difference]: Finished difference Result 141 states and 329 transitions. [2020-09-15 01:24:33,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:24:33,604 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-15 01:24:33,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:33,605 INFO L225 Difference]: With dead ends: 141 [2020-09-15 01:24:33,605 INFO L226 Difference]: Without dead ends: 135 [2020-09-15 01:24:33,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=960, Invalid=2580, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 01:24:33,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-15 01:24:33,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 89. [2020-09-15 01:24:33,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-15 01:24:33,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 225 transitions. [2020-09-15 01:24:33,608 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 225 transitions. Word has length 29 [2020-09-15 01:24:33,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:33,608 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 225 transitions. [2020-09-15 01:24:33,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:33,609 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 225 transitions. [2020-09-15 01:24:33,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:33,609 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:33,609 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:33,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:33,818 INFO L427 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:33,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:33,819 INFO L82 PathProgramCache]: Analyzing trace with hash 412446910, now seen corresponding path program 252 times [2020-09-15 01:24:33,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:33,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190871033] [2020-09-15 01:24:33,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:34,340 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:34,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190871033] [2020-09-15 01:24:34,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072742460] [2020-09-15 01:24:34,341 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:34,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-15 01:24:34,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:34,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:34,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:34,454 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:24:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:34,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:34,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-15 01:24:34,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729299429] [2020-09-15 01:24:34,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:24:34,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:34,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:24:34,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:24:34,481 INFO L87 Difference]: Start difference. First operand 89 states and 225 transitions. Second operand 26 states. [2020-09-15 01:24:36,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:36,422 INFO L93 Difference]: Finished difference Result 138 states and 323 transitions. [2020-09-15 01:24:36,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:24:36,424 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 01:24:36,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:36,424 INFO L225 Difference]: With dead ends: 138 [2020-09-15 01:24:36,424 INFO L226 Difference]: Without dead ends: 132 [2020-09-15 01:24:36,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=967, Invalid=2693, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 01:24:36,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-15 01:24:36,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 88. [2020-09-15 01:24:36,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-15 01:24:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-09-15 01:24:36,428 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 29 [2020-09-15 01:24:36,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:36,428 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-09-15 01:24:36,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:24:36,428 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-09-15 01:24:36,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:36,428 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:36,428 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:36,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:36,631 INFO L427 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:36,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:36,632 INFO L82 PathProgramCache]: Analyzing trace with hash 2028639420, now seen corresponding path program 253 times [2020-09-15 01:24:36,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:36,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029530701] [2020-09-15 01:24:36,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:37,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029530701] [2020-09-15 01:24:37,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508747238] [2020-09-15 01:24:37,146 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:37,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:37,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:37,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:37,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 01:24:37,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148431512] [2020-09-15 01:24:37,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:24:37,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:37,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:24:37,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:24:37,250 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 25 states. [2020-09-15 01:24:39,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:39,008 INFO L93 Difference]: Finished difference Result 139 states and 327 transitions. [2020-09-15 01:24:39,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-15 01:24:39,010 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-15 01:24:39,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:39,011 INFO L225 Difference]: With dead ends: 139 [2020-09-15 01:24:39,011 INFO L226 Difference]: Without dead ends: 133 [2020-09-15 01:24:39,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1058, Invalid=2724, Unknown=0, NotChecked=0, Total=3782 [2020-09-15 01:24:39,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-15 01:24:39,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 91. [2020-09-15 01:24:39,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-15 01:24:39,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 231 transitions. [2020-09-15 01:24:39,014 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 231 transitions. Word has length 29 [2020-09-15 01:24:39,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:39,014 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 231 transitions. [2020-09-15 01:24:39,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:39,014 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 231 transitions. [2020-09-15 01:24:39,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:39,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:39,015 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:39,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2020-09-15 01:24:39,222 INFO L427 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:39,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:39,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1746584800, now seen corresponding path program 254 times [2020-09-15 01:24:39,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:39,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401517032] [2020-09-15 01:24:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:39,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401517032] [2020-09-15 01:24:39,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993121147] [2020-09-15 01:24:39,735 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:39,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:24:39,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:39,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:39,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:39,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:24:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:39,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:39,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-15 01:24:39,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830207773] [2020-09-15 01:24:39,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:24:39,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:39,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:24:39,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:24:39,876 INFO L87 Difference]: Start difference. First operand 91 states and 231 transitions. Second operand 26 states. [2020-09-15 01:24:41,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:41,998 INFO L93 Difference]: Finished difference Result 136 states and 321 transitions. [2020-09-15 01:24:42,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 01:24:42,000 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 01:24:42,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:42,001 INFO L225 Difference]: With dead ends: 136 [2020-09-15 01:24:42,001 INFO L226 Difference]: Without dead ends: 130 [2020-09-15 01:24:42,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1066, Invalid=2840, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 01:24:42,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-15 01:24:42,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2020-09-15 01:24:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-15 01:24:42,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 229 transitions. [2020-09-15 01:24:42,009 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 229 transitions. Word has length 29 [2020-09-15 01:24:42,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:42,009 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 229 transitions. [2020-09-15 01:24:42,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:24:42,010 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 229 transitions. [2020-09-15 01:24:42,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:42,010 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:42,010 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:42,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-09-15 01:24:42,211 INFO L427 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:42,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:42,212 INFO L82 PathProgramCache]: Analyzing trace with hash -91273570, now seen corresponding path program 255 times [2020-09-15 01:24:42,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:42,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071513605] [2020-09-15 01:24:42,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:42,709 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:42,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071513605] [2020-09-15 01:24:42,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245427173] [2020-09-15 01:24:42,710 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:42,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-15 01:24:42,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:42,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:42,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:42,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:42,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 01:24:42,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454095673] [2020-09-15 01:24:42,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:24:42,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:42,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:24:42,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:24:42,827 INFO L87 Difference]: Start difference. First operand 90 states and 229 transitions. Second operand 25 states. [2020-09-15 01:24:44,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:44,693 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-09-15 01:24:44,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-15 01:24:44,695 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-15 01:24:44,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:44,696 INFO L225 Difference]: With dead ends: 137 [2020-09-15 01:24:44,696 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 01:24:44,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1172, Invalid=2860, Unknown=0, NotChecked=0, Total=4032 [2020-09-15 01:24:44,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 01:24:44,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2020-09-15 01:24:44,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:24:44,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:24:44,699 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 29 [2020-09-15 01:24:44,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:44,699 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:24:44,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:44,699 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:24:44,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:44,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:44,700 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:44,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-09-15 01:24:44,900 INFO L427 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:44,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:44,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1811401214, now seen corresponding path program 256 times [2020-09-15 01:24:44,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:44,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762007084] [2020-09-15 01:24:44,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:45,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762007084] [2020-09-15 01:24:45,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316680982] [2020-09-15 01:24:45,410 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:45,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:24:45,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:45,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:45,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:45,543 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:24:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:45,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:45,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-15 01:24:45,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436184952] [2020-09-15 01:24:45,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:24:45,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:45,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:24:45,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:24:45,570 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 26 states. [2020-09-15 01:24:47,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:47,850 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-09-15 01:24:47,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 01:24:47,852 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 01:24:47,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:47,852 INFO L225 Difference]: With dead ends: 134 [2020-09-15 01:24:47,852 INFO L226 Difference]: Without dead ends: 128 [2020-09-15 01:24:47,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1181, Invalid=2979, Unknown=0, NotChecked=0, Total=4160 [2020-09-15 01:24:47,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-15 01:24:47,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 92. [2020-09-15 01:24:47,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:24:47,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:24:47,855 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 29 [2020-09-15 01:24:47,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:47,856 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:24:47,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:24:47,856 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:24:47,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:47,856 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:47,856 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:48,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:48,057 INFO L427 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:48,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:48,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1340405504, now seen corresponding path program 257 times [2020-09-15 01:24:48,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:48,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630088485] [2020-09-15 01:24:48,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:48,570 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:48,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630088485] [2020-09-15 01:24:48,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77282189] [2020-09-15 01:24:48,571 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:48,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-15 01:24:48,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:48,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:48,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:48,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:48,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 01:24:48,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40825013] [2020-09-15 01:24:48,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:24:48,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:48,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:24:48,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:24:48,688 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 25 states. [2020-09-15 01:24:50,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:50,690 INFO L93 Difference]: Finished difference Result 135 states and 323 transitions. [2020-09-15 01:24:50,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-15 01:24:50,692 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-15 01:24:50,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:50,693 INFO L225 Difference]: With dead ends: 135 [2020-09-15 01:24:50,693 INFO L226 Difference]: Without dead ends: 129 [2020-09-15 01:24:50,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1302, Invalid=2988, Unknown=0, NotChecked=0, Total=4290 [2020-09-15 01:24:50,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-15 01:24:50,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2020-09-15 01:24:50,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-15 01:24:50,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 243 transitions. [2020-09-15 01:24:50,696 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 243 transitions. Word has length 29 [2020-09-15 01:24:50,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:50,696 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 243 transitions. [2020-09-15 01:24:50,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:50,696 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 243 transitions. [2020-09-15 01:24:50,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:50,696 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:50,696 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:50,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-09-15 01:24:50,897 INFO L427 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:50,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:50,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1324318364, now seen corresponding path program 258 times [2020-09-15 01:24:50,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:50,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132189507] [2020-09-15 01:24:50,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:50,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:51,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132189507] [2020-09-15 01:24:51,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287280247] [2020-09-15 01:24:51,407 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:51,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-15 01:24:51,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:51,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:51,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:51,536 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:24:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:51,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:51,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-15 01:24:51,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292756887] [2020-09-15 01:24:51,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:24:51,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:51,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:24:51,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:24:51,569 INFO L87 Difference]: Start difference. First operand 95 states and 243 transitions. Second operand 26 states. [2020-09-15 01:24:54,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:54,025 INFO L93 Difference]: Finished difference Result 132 states and 317 transitions. [2020-09-15 01:24:54,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-15 01:24:54,026 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 01:24:54,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:54,027 INFO L225 Difference]: With dead ends: 132 [2020-09-15 01:24:54,027 INFO L226 Difference]: Without dead ends: 126 [2020-09-15 01:24:54,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1312, Invalid=3110, Unknown=0, NotChecked=0, Total=4422 [2020-09-15 01:24:54,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-15 01:24:54,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 94. [2020-09-15 01:24:54,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-15 01:24:54,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-09-15 01:24:54,035 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 29 [2020-09-15 01:24:54,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:54,035 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-09-15 01:24:54,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:24:54,035 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-09-15 01:24:54,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:54,035 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:54,035 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:54,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:54,236 INFO L427 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:54,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:54,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1323828254, now seen corresponding path program 259 times [2020-09-15 01:24:54,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:54,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235318204] [2020-09-15 01:24:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:54,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235318204] [2020-09-15 01:24:54,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047197568] [2020-09-15 01:24:54,743 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:54,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:54,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:54,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:54,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:54,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 01:24:54,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308783674] [2020-09-15 01:24:54,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:24:54,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:54,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:24:54,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:24:54,862 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 25 states. [2020-09-15 01:24:56,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:56,980 INFO L93 Difference]: Finished difference Result 152 states and 367 transitions. [2020-09-15 01:24:56,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-15 01:24:56,981 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-15 01:24:56,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:56,981 INFO L225 Difference]: With dead ends: 152 [2020-09-15 01:24:56,982 INFO L226 Difference]: Without dead ends: 146 [2020-09-15 01:24:56,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1448, Invalid=3108, Unknown=0, NotChecked=0, Total=4556 [2020-09-15 01:24:56,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-15 01:24:56,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2020-09-15 01:24:56,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-15 01:24:56,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 261 transitions. [2020-09-15 01:24:56,984 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 261 transitions. Word has length 29 [2020-09-15 01:24:56,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:56,984 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 261 transitions. [2020-09-15 01:24:56,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:56,984 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 261 transitions. [2020-09-15 01:24:56,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:56,984 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:56,984 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:57,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2020-09-15 01:24:57,187 INFO L427 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:57,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:57,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1323811514, now seen corresponding path program 260 times [2020-09-15 01:24:57,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:57,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781172606] [2020-09-15 01:24:57,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:57,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781172606] [2020-09-15 01:24:57,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380964085] [2020-09-15 01:24:57,703 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:57,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:24:57,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:57,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:24:57,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:57,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:57,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-15 01:24:57,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36105883] [2020-09-15 01:24:57,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:24:57,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:57,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:24:57,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:24:57,851 INFO L87 Difference]: Start difference. First operand 100 states and 261 transitions. Second operand 26 states. [2020-09-15 01:25:00,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:00,138 INFO L93 Difference]: Finished difference Result 133 states and 323 transitions. [2020-09-15 01:25:00,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-15 01:25:00,139 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 01:25:00,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:00,140 INFO L225 Difference]: With dead ends: 133 [2020-09-15 01:25:00,140 INFO L226 Difference]: Without dead ends: 125 [2020-09-15 01:25:00,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1321, Invalid=3371, Unknown=0, NotChecked=0, Total=4692 [2020-09-15 01:25:00,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-15 01:25:00,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 97. [2020-09-15 01:25:00,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-15 01:25:00,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 249 transitions. [2020-09-15 01:25:00,142 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 249 transitions. Word has length 29 [2020-09-15 01:25:00,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:00,142 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 249 transitions. [2020-09-15 01:25:00,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:25:00,142 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 249 transitions. [2020-09-15 01:25:00,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:00,142 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:00,142 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:00,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:00,343 INFO L427 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:00,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:00,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1170458439, now seen corresponding path program 261 times [2020-09-15 01:25:00,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:00,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369781734] [2020-09-15 01:25:00,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:01,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369781734] [2020-09-15 01:25:01,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973335548] [2020-09-15 01:25:01,027 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:01,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-15 01:25:01,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:01,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:01,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:01,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:01,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 01:25:01,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154111016] [2020-09-15 01:25:01,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:25:01,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:01,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:25:01,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:25:01,118 INFO L87 Difference]: Start difference. First operand 97 states and 249 transitions. Second operand 26 states. [2020-09-15 01:25:02,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:02,233 INFO L93 Difference]: Finished difference Result 154 states and 363 transitions. [2020-09-15 01:25:02,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:25:02,235 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-15 01:25:02,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:02,235 INFO L225 Difference]: With dead ends: 154 [2020-09-15 01:25:02,235 INFO L226 Difference]: Without dead ends: 148 [2020-09-15 01:25:02,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=717, Invalid=1635, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:25:02,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-15 01:25:02,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 99. [2020-09-15 01:25:02,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:25:02,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-15 01:25:02,239 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-15 01:25:02,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:02,239 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-15 01:25:02,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:25:02,239 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-15 01:25:02,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:02,239 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:02,239 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:02,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:02,442 INFO L427 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:02,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:02,443 INFO L82 PathProgramCache]: Analyzing trace with hash 2085740573, now seen corresponding path program 262 times [2020-09-15 01:25:02,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:02,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756354020] [2020-09-15 01:25:02,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:02,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:03,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756354020] [2020-09-15 01:25:03,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280756408] [2020-09-15 01:25:03,133 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:03,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:25:03,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:03,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:03,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:03,243 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:25:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:03,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:03,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-15 01:25:03,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424362209] [2020-09-15 01:25:03,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:25:03,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:03,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:25:03,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:25:03,259 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-15 01:25:04,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:04,537 INFO L93 Difference]: Finished difference Result 151 states and 357 transitions. [2020-09-15 01:25:04,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:25:04,538 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 01:25:04,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:04,539 INFO L225 Difference]: With dead ends: 151 [2020-09-15 01:25:04,539 INFO L226 Difference]: Without dead ends: 145 [2020-09-15 01:25:04,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=770, Invalid=1882, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 01:25:04,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-15 01:25:04,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 98. [2020-09-15 01:25:04,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:25:04,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-15 01:25:04,542 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-15 01:25:04,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:04,542 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-15 01:25:04,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:25:04,542 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-15 01:25:04,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:04,542 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:04,542 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:04,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:04,743 INFO L427 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:04,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:04,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1794443493, now seen corresponding path program 263 times [2020-09-15 01:25:04,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:04,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886016166] [2020-09-15 01:25:04,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:05,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886016166] [2020-09-15 01:25:05,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734821839] [2020-09-15 01:25:05,405 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:05,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-15 01:25:05,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:05,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:05,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:05,498 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:05,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:05,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 01:25:05,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42782715] [2020-09-15 01:25:05,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:25:05,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:05,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:25:05,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:25:05,500 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-15 01:25:06,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:06,820 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-09-15 01:25:06,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:25:06,821 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-15 01:25:06,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:06,822 INFO L225 Difference]: With dead ends: 148 [2020-09-15 01:25:06,822 INFO L226 Difference]: Without dead ends: 142 [2020-09-15 01:25:06,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=720, Invalid=1830, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 01:25:06,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-15 01:25:06,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 99. [2020-09-15 01:25:06,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:25:06,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-15 01:25:06,825 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-15 01:25:06,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:06,825 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-15 01:25:06,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:25:06,825 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-15 01:25:06,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:06,825 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:06,826 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:07,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:07,028 INFO L427 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:07,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:07,029 INFO L82 PathProgramCache]: Analyzing trace with hash 778774399, now seen corresponding path program 264 times [2020-09-15 01:25:07,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:07,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098821093] [2020-09-15 01:25:07,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:07,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098821093] [2020-09-15 01:25:07,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299747795] [2020-09-15 01:25:07,768 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:07,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-15 01:25:07,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:07,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:07,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:07,896 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:25:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:07,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:07,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-15 01:25:07,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618467382] [2020-09-15 01:25:07,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:25:07,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:07,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:25:07,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:25:07,917 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-15 01:25:09,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:09,422 INFO L93 Difference]: Finished difference Result 147 states and 349 transitions. [2020-09-15 01:25:09,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:25:09,423 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 01:25:09,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:09,424 INFO L225 Difference]: With dead ends: 147 [2020-09-15 01:25:09,424 INFO L226 Difference]: Without dead ends: 141 [2020-09-15 01:25:09,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=780, Invalid=2082, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 01:25:09,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-15 01:25:09,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 98. [2020-09-15 01:25:09,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:25:09,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-15 01:25:09,427 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-15 01:25:09,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:09,427 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-15 01:25:09,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:25:09,428 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-15 01:25:09,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:09,428 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:09,428 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:09,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:09,629 INFO L427 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:09,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:09,630 INFO L82 PathProgramCache]: Analyzing trace with hash -405150211, now seen corresponding path program 265 times [2020-09-15 01:25:09,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:09,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649429317] [2020-09-15 01:25:09,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:10,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649429317] [2020-09-15 01:25:10,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088263063] [2020-09-15 01:25:10,255 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:10,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:10,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:10,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:10,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 01:25:10,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95136100] [2020-09-15 01:25:10,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:25:10,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:10,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:25:10,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:25:10,349 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-15 01:25:11,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:11,687 INFO L93 Difference]: Finished difference Result 144 states and 343 transitions. [2020-09-15 01:25:11,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:25:11,689 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-15 01:25:11,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:11,690 INFO L225 Difference]: With dead ends: 144 [2020-09-15 01:25:11,690 INFO L226 Difference]: Without dead ends: 138 [2020-09-15 01:25:11,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=739, Invalid=2017, Unknown=0, NotChecked=0, Total=2756 [2020-09-15 01:25:11,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-15 01:25:11,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 99. [2020-09-15 01:25:11,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:25:11,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-15 01:25:11,692 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-15 01:25:11,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:11,692 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-15 01:25:11,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:25:11,693 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-15 01:25:11,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:11,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:11,693 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:11,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2020-09-15 01:25:11,894 INFO L427 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:11,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:11,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1953308831, now seen corresponding path program 266 times [2020-09-15 01:25:11,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:11,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753904431] [2020-09-15 01:25:11,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:12,553 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:12,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753904431] [2020-09-15 01:25:12,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970191136] [2020-09-15 01:25:12,554 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:12,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:25:12,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:12,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:12,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:12,666 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:25:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:12,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:12,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-15 01:25:12,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76790934] [2020-09-15 01:25:12,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:25:12,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:12,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:25:12,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:25:12,689 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-15 01:25:14,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:14,267 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-09-15 01:25:14,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:25:14,269 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 01:25:14,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:14,270 INFO L225 Difference]: With dead ends: 143 [2020-09-15 01:25:14,270 INFO L226 Difference]: Without dead ends: 137 [2020-09-15 01:25:14,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=806, Invalid=2274, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 01:25:14,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-15 01:25:14,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2020-09-15 01:25:14,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:25:14,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-15 01:25:14,272 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-15 01:25:14,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:14,273 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-15 01:25:14,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:25:14,273 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-15 01:25:14,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:14,273 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:14,273 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:14,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-09-15 01:25:14,474 INFO L427 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:14,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:14,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1039869279, now seen corresponding path program 267 times [2020-09-15 01:25:14,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:14,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791240] [2020-09-15 01:25:14,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:15,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791240] [2020-09-15 01:25:15,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133571992] [2020-09-15 01:25:15,065 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:15,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-15 01:25:15,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:15,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:15,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:15,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:15,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 01:25:15,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411695692] [2020-09-15 01:25:15,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:25:15,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:15,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:25:15,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:25:15,170 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-15 01:25:16,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:16,608 INFO L93 Difference]: Finished difference Result 140 states and 335 transitions. [2020-09-15 01:25:16,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:25:16,610 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-15 01:25:16,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:16,610 INFO L225 Difference]: With dead ends: 140 [2020-09-15 01:25:16,610 INFO L226 Difference]: Without dead ends: 134 [2020-09-15 01:25:16,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=774, Invalid=2196, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 01:25:16,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-15 01:25:16,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 99. [2020-09-15 01:25:16,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:25:16,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-15 01:25:16,613 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-15 01:25:16,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:16,613 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-15 01:25:16,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:25:16,614 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-15 01:25:16,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:16,614 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:16,614 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:16,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2020-09-15 01:25:16,815 INFO L427 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:16,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:16,815 INFO L82 PathProgramCache]: Analyzing trace with hash 229320643, now seen corresponding path program 268 times [2020-09-15 01:25:16,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:16,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926380467] [2020-09-15 01:25:16,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:17,440 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:17,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926380467] [2020-09-15 01:25:17,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957060676] [2020-09-15 01:25:17,441 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:17,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:25:17,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:17,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:17,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:17,560 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:25:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:17,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:17,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-15 01:25:17,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019431493] [2020-09-15 01:25:17,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:25:17,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:17,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:25:17,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:25:17,587 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-15 01:25:19,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:19,507 INFO L93 Difference]: Finished difference Result 139 states and 333 transitions. [2020-09-15 01:25:19,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:25:19,509 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 01:25:19,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:19,509 INFO L225 Difference]: With dead ends: 139 [2020-09-15 01:25:19,510 INFO L226 Difference]: Without dead ends: 133 [2020-09-15 01:25:19,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=848, Invalid=2458, Unknown=0, NotChecked=0, Total=3306 [2020-09-15 01:25:19,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-15 01:25:19,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2020-09-15 01:25:19,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:25:19,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-15 01:25:19,512 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-15 01:25:19,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:19,512 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-15 01:25:19,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:25:19,512 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-15 01:25:19,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:19,513 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:19,513 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:19,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-09-15 01:25:19,714 INFO L427 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:19,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:19,714 INFO L82 PathProgramCache]: Analyzing trace with hash 281597249, now seen corresponding path program 269 times [2020-09-15 01:25:19,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:19,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807554651] [2020-09-15 01:25:19,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:20,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807554651] [2020-09-15 01:25:20,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066422666] [2020-09-15 01:25:20,321 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:20,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-15 01:25:20,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:20,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:20,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:20,420 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:20,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:20,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 01:25:20,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450574359] [2020-09-15 01:25:20,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:25:20,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:20,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:25:20,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:25:20,422 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-15 01:25:22,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:22,052 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-09-15 01:25:22,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:25:22,054 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-15 01:25:22,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:22,054 INFO L225 Difference]: With dead ends: 136 [2020-09-15 01:25:22,054 INFO L226 Difference]: Without dead ends: 130 [2020-09-15 01:25:22,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=825, Invalid=2367, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 01:25:22,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-15 01:25:22,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 99. [2020-09-15 01:25:22,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:25:22,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-15 01:25:22,057 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-15 01:25:22,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:22,057 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-15 01:25:22,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:25:22,057 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-15 01:25:22,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:22,058 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:22,058 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:22,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:22,259 INFO L427 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:22,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:22,259 INFO L82 PathProgramCache]: Analyzing trace with hash -2137120603, now seen corresponding path program 270 times [2020-09-15 01:25:22,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:22,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174771078] [2020-09-15 01:25:22,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:22,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174771078] [2020-09-15 01:25:22,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254750341] [2020-09-15 01:25:22,911 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:22,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-15 01:25:22,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:22,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:22,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:23,040 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:25:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:23,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:23,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-15 01:25:23,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824874105] [2020-09-15 01:25:23,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:25:23,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:23,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:25:23,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:25:23,067 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-15 01:25:25,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:25,062 INFO L93 Difference]: Finished difference Result 135 states and 325 transitions. [2020-09-15 01:25:25,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:25:25,064 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 01:25:25,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:25,064 INFO L225 Difference]: With dead ends: 135 [2020-09-15 01:25:25,064 INFO L226 Difference]: Without dead ends: 129 [2020-09-15 01:25:25,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=906, Invalid=2634, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 01:25:25,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-15 01:25:25,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 98. [2020-09-15 01:25:25,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:25:25,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-15 01:25:25,067 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-15 01:25:25,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:25,067 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-15 01:25:25,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:25:25,067 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-15 01:25:25,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:25,068 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:25,068 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:25,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2020-09-15 01:25:25,269 INFO L427 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:25,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:25,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1448798813, now seen corresponding path program 271 times [2020-09-15 01:25:25,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:25,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785996784] [2020-09-15 01:25:25,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:25,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785996784] [2020-09-15 01:25:25,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138246359] [2020-09-15 01:25:25,845 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:25,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:25,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:25,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:25,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:25,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 01:25:25,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742284749] [2020-09-15 01:25:25,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:25:25,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:25,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:25:25,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:25:25,943 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-15 01:25:27,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:27,640 INFO L93 Difference]: Finished difference Result 132 states and 319 transitions. [2020-09-15 01:25:27,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:25:27,642 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-15 01:25:27,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:27,642 INFO L225 Difference]: With dead ends: 132 [2020-09-15 01:25:27,643 INFO L226 Difference]: Without dead ends: 126 [2020-09-15 01:25:27,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=892, Invalid=2530, Unknown=0, NotChecked=0, Total=3422 [2020-09-15 01:25:27,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-15 01:25:27,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2020-09-15 01:25:27,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:25:27,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-15 01:25:27,645 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-15 01:25:27,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:27,645 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-15 01:25:27,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:25:27,646 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-15 01:25:27,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:27,646 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:27,646 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:27,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:27,847 INFO L427 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:27,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:27,848 INFO L82 PathProgramCache]: Analyzing trace with hash -463607289, now seen corresponding path program 272 times [2020-09-15 01:25:27,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:27,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330744791] [2020-09-15 01:25:27,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:28,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330744791] [2020-09-15 01:25:28,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750776135] [2020-09-15 01:25:28,443 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:28,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:25:28,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:28,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:28,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:28,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:25:28,579 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:28,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:28,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-15 01:25:28,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718134610] [2020-09-15 01:25:28,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:25:28,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:28,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:25:28,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:25:28,580 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-15 01:25:30,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:30,621 INFO L93 Difference]: Finished difference Result 131 states and 317 transitions. [2020-09-15 01:25:30,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:25:30,622 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 01:25:30,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:30,623 INFO L225 Difference]: With dead ends: 131 [2020-09-15 01:25:30,623 INFO L226 Difference]: Without dead ends: 125 [2020-09-15 01:25:30,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=980, Invalid=2802, Unknown=0, NotChecked=0, Total=3782 [2020-09-15 01:25:30,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-15 01:25:30,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 98. [2020-09-15 01:25:30,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:25:30,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-15 01:25:30,625 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-15 01:25:30,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:30,625 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-15 01:25:30,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:25:30,626 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-15 01:25:30,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:30,626 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:30,626 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:30,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:30,827 INFO L427 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:30,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:30,827 INFO L82 PathProgramCache]: Analyzing trace with hash -2080766331, now seen corresponding path program 273 times [2020-09-15 01:25:30,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:30,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806083077] [2020-09-15 01:25:30,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:31,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806083077] [2020-09-15 01:25:31,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321494137] [2020-09-15 01:25:31,382 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:31,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-15 01:25:31,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:31,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:31,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:31,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:31,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 01:25:31,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402594846] [2020-09-15 01:25:31,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:25:31,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:31,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:25:31,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:25:31,488 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-15 01:25:33,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:33,260 INFO L93 Difference]: Finished difference Result 128 states and 311 transitions. [2020-09-15 01:25:33,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:25:33,261 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-15 01:25:33,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:33,261 INFO L225 Difference]: With dead ends: 128 [2020-09-15 01:25:33,261 INFO L226 Difference]: Without dead ends: 122 [2020-09-15 01:25:33,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=975, Invalid=2685, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 01:25:33,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-15 01:25:33,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2020-09-15 01:25:33,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:25:33,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-15 01:25:33,264 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-15 01:25:33,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:33,264 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-15 01:25:33,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:25:33,264 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-15 01:25:33,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:33,264 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:33,264 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:33,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:33,466 INFO L427 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:33,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:33,467 INFO L82 PathProgramCache]: Analyzing trace with hash -823876631, now seen corresponding path program 274 times [2020-09-15 01:25:33,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:33,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997522158] [2020-09-15 01:25:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:34,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997522158] [2020-09-15 01:25:34,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192650133] [2020-09-15 01:25:34,028 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:34,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:25:34,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:34,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:34,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:34,137 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:25:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:34,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:34,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-15 01:25:34,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579636921] [2020-09-15 01:25:34,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:25:34,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:34,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:25:34,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:25:34,164 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-15 01:25:36,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:36,460 INFO L93 Difference]: Finished difference Result 127 states and 309 transitions. [2020-09-15 01:25:36,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 01:25:36,461 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 01:25:36,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:36,462 INFO L225 Difference]: With dead ends: 127 [2020-09-15 01:25:36,462 INFO L226 Difference]: Without dead ends: 121 [2020-09-15 01:25:36,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1070, Invalid=2962, Unknown=0, NotChecked=0, Total=4032 [2020-09-15 01:25:36,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-15 01:25:36,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2020-09-15 01:25:36,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:25:36,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-15 01:25:36,465 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-15 01:25:36,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:36,465 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-15 01:25:36,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:25:36,465 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-15 01:25:36,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:36,465 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:36,465 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:36,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:36,666 INFO L427 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:36,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:36,667 INFO L82 PathProgramCache]: Analyzing trace with hash 792315879, now seen corresponding path program 275 times [2020-09-15 01:25:36,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:36,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951977271] [2020-09-15 01:25:36,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:37,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951977271] [2020-09-15 01:25:37,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692807096] [2020-09-15 01:25:37,265 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:37,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-15 01:25:37,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:37,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:37,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:37,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:37,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 01:25:37,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261408272] [2020-09-15 01:25:37,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:25:37,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:37,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:25:37,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:25:37,402 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-15 01:25:39,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:39,489 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-09-15 01:25:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-15 01:25:39,491 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-15 01:25:39,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:39,491 INFO L225 Difference]: With dead ends: 124 [2020-09-15 01:25:39,491 INFO L226 Difference]: Without dead ends: 118 [2020-09-15 01:25:39,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1074, Invalid=2832, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 01:25:39,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-15 01:25:39,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 99. [2020-09-15 01:25:39,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:25:39,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-15 01:25:39,494 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-15 01:25:39,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:39,494 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-15 01:25:39,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:25:39,494 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-15 01:25:39,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:39,495 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:39,495 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:39,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2020-09-15 01:25:39,696 INFO L427 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:39,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:39,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1312058955, now seen corresponding path program 276 times [2020-09-15 01:25:39,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:39,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428832213] [2020-09-15 01:25:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:40,261 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:40,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428832213] [2020-09-15 01:25:40,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998682566] [2020-09-15 01:25:40,262 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:40,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-15 01:25:40,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:40,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:40,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:40,378 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:25:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:40,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:40,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-15 01:25:40,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811853798] [2020-09-15 01:25:40,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:25:40,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:40,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:25:40,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:25:40,407 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-15 01:25:42,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:42,985 INFO L93 Difference]: Finished difference Result 123 states and 301 transitions. [2020-09-15 01:25:42,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 01:25:42,986 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 01:25:42,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:42,987 INFO L225 Difference]: With dead ends: 123 [2020-09-15 01:25:42,987 INFO L226 Difference]: Without dead ends: 117 [2020-09-15 01:25:42,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1176, Invalid=3114, Unknown=0, NotChecked=0, Total=4290 [2020-09-15 01:25:42,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-15 01:25:42,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-09-15 01:25:42,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:25:42,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-15 01:25:42,990 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-15 01:25:42,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:42,990 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-15 01:25:42,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:25:42,990 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-15 01:25:42,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:42,990 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:42,990 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:43,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2020-09-15 01:25:43,192 INFO L427 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:43,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:43,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1327597111, now seen corresponding path program 277 times [2020-09-15 01:25:43,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:43,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869515979] [2020-09-15 01:25:43,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:43,725 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:43,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869515979] [2020-09-15 01:25:43,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681155626] [2020-09-15 01:25:43,726 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:43,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:43,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:43,838 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:43,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:43,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 01:25:43,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315308896] [2020-09-15 01:25:43,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:25:43,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:43,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:25:43,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:25:43,840 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-15 01:25:45,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:45,998 INFO L93 Difference]: Finished difference Result 120 states and 295 transitions. [2020-09-15 01:25:45,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-15 01:25:45,999 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-15 01:25:46,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:46,000 INFO L225 Difference]: With dead ends: 120 [2020-09-15 01:25:46,000 INFO L226 Difference]: Without dead ends: 114 [2020-09-15 01:25:46,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1189, Invalid=2971, Unknown=0, NotChecked=0, Total=4160 [2020-09-15 01:25:46,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-15 01:25:46,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 99. [2020-09-15 01:25:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:25:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-15 01:25:46,003 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-15 01:25:46,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:46,003 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-15 01:25:46,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:25:46,003 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-15 01:25:46,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:46,004 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:46,004 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:46,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2020-09-15 01:25:46,205 INFO L427 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:46,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:46,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1247242541, now seen corresponding path program 278 times [2020-09-15 01:25:46,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:46,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63767943] [2020-09-15 01:25:46,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:46,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63767943] [2020-09-15 01:25:46,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737907776] [2020-09-15 01:25:46,775 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:46,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:25:46,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:46,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:46,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:46,904 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:25:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:46,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:46,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-15 01:25:46,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346959732] [2020-09-15 01:25:46,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:25:46,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:46,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:25:46,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:25:46,935 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-15 01:25:49,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:49,615 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-09-15 01:25:49,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-15 01:25:49,617 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 01:25:49,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:49,617 INFO L225 Difference]: With dead ends: 119 [2020-09-15 01:25:49,618 INFO L226 Difference]: Without dead ends: 113 [2020-09-15 01:25:49,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1298, Invalid=3258, Unknown=0, NotChecked=0, Total=4556 [2020-09-15 01:25:49,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-15 01:25:49,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 98. [2020-09-15 01:25:49,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:25:49,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-15 01:25:49,620 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-15 01:25:49,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:49,621 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-15 01:25:49,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:25:49,621 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-15 01:25:49,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:49,621 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:49,621 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:49,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-09-15 01:25:49,822 INFO L427 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:49,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:49,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1718238251, now seen corresponding path program 279 times [2020-09-15 01:25:49,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:49,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422624171] [2020-09-15 01:25:49,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:50,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422624171] [2020-09-15 01:25:50,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018771465] [2020-09-15 01:25:50,438 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 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:50,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-15 01:25:50,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:50,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:50,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:50,562 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:50,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:50,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 01:25:50,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465707865] [2020-09-15 01:25:50,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:25:50,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:50,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:25:50,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:25:50,563 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-15 01:25:52,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:52,823 INFO L93 Difference]: Finished difference Result 116 states and 287 transitions. [2020-09-15 01:25:52,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-15 01:25:52,824 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-15 01:25:52,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:52,825 INFO L225 Difference]: With dead ends: 116 [2020-09-15 01:25:52,825 INFO L226 Difference]: Without dead ends: 110 [2020-09-15 01:25:52,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1320, Invalid=3102, Unknown=0, NotChecked=0, Total=4422 [2020-09-15 01:25:52,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-15 01:25:52,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2020-09-15 01:25:52,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:25:52,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-15 01:25:52,828 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-15 01:25:52,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:52,828 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-15 01:25:52,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:25:52,828 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-15 01:25:52,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:52,828 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:52,828 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:53,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:53,029 INFO L427 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:53,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:53,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1734325391, now seen corresponding path program 280 times [2020-09-15 01:25:53,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:53,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103773854] [2020-09-15 01:25:53,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:53,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103773854] [2020-09-15 01:25:53,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388950376] [2020-09-15 01:25:53,596 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:53,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:25:53,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:53,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:53,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:53,719 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:25:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:53,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:53,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-15 01:25:53,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257846534] [2020-09-15 01:25:53,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:25:53,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:53,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:25:53,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:25:53,753 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-15 01:25:56,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:56,450 INFO L93 Difference]: Finished difference Result 115 states and 285 transitions. [2020-09-15 01:25:56,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-15 01:25:56,452 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 01:25:56,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:56,453 INFO L225 Difference]: With dead ends: 115 [2020-09-15 01:25:56,453 INFO L226 Difference]: Without dead ends: 109 [2020-09-15 01:25:56,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1436, Invalid=3394, Unknown=0, NotChecked=0, Total=4830 [2020-09-15 01:25:56,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-15 01:25:56,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-09-15 01:25:56,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:25:56,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-15 01:25:56,455 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-15 01:25:56,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:56,456 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-15 01:25:56,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:25:56,456 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-15 01:25:56,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:56,456 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:56,456 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:56,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2020-09-15 01:25:56,657 INFO L427 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:56,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:56,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1734815501, now seen corresponding path program 281 times [2020-09-15 01:25:56,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:56,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317031091] [2020-09-15 01:25:56,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:57,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317031091] [2020-09-15 01:25:57,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124006057] [2020-09-15 01:25:57,244 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:57,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-15 01:25:57,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:57,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:57,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:57,369 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:57,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:57,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 01:25:57,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161607876] [2020-09-15 01:25:57,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:25:57,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:57,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:25:57,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:25:57,370 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-15 01:25:59,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:59,643 INFO L93 Difference]: Finished difference Result 131 states and 325 transitions. [2020-09-15 01:25:59,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-15 01:25:59,646 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-15 01:25:59,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:59,646 INFO L225 Difference]: With dead ends: 131 [2020-09-15 01:25:59,646 INFO L226 Difference]: Without dead ends: 125 [2020-09-15 01:25:59,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1467, Invalid=3225, Unknown=0, NotChecked=0, Total=4692 [2020-09-15 01:25:59,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-15 01:25:59,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 102. [2020-09-15 01:25:59,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-15 01:25:59,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 265 transitions. [2020-09-15 01:25:59,650 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 265 transitions. Word has length 30 [2020-09-15 01:25:59,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:59,650 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 265 transitions. [2020-09-15 01:25:59,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:25:59,650 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 265 transitions. [2020-09-15 01:25:59,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:59,650 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:59,650 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:59,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:59,851 INFO L427 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:59,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:59,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1734832241, now seen corresponding path program 282 times [2020-09-15 01:25:59,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:59,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523771735] [2020-09-15 01:25:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:00,395 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:00,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523771735] [2020-09-15 01:26:00,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79380133] [2020-09-15 01:26:00,395 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:00,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-15 01:26:00,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:00,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:00,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:00,556 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:00,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:00,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-15 01:26:00,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476803965] [2020-09-15 01:26:00,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:26:00,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:00,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:26:00,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:26:00,558 INFO L87 Difference]: Start difference. First operand 102 states and 265 transitions. Second operand 27 states. [2020-09-15 01:26:03,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:03,237 INFO L93 Difference]: Finished difference Result 110 states and 277 transitions. [2020-09-15 01:26:03,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-15 01:26:03,239 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 01:26:03,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:03,240 INFO L225 Difference]: With dead ends: 110 [2020-09-15 01:26:03,240 INFO L226 Difference]: Without dead ends: 102 [2020-09-15 01:26:03,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1337, Invalid=3493, Unknown=0, NotChecked=0, Total=4830 [2020-09-15 01:26:03,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-15 01:26:03,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2020-09-15 01:26:03,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-15 01:26:03,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 178 transitions. [2020-09-15 01:26:03,243 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 178 transitions. Word has length 30 [2020-09-15 01:26:03,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:03,243 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 178 transitions. [2020-09-15 01:26:03,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:26:03,243 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 178 transitions. [2020-09-15 01:26:03,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:26:03,243 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:03,243 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:03,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:03,444 INFO L427 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:03,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:03,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1911532333, now seen corresponding path program 283 times [2020-09-15 01:26:03,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:03,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744761411] [2020-09-15 01:26:03,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:03,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:04,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744761411] [2020-09-15 01:26:04,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557876286] [2020-09-15 01:26:04,082 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:04,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:04,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:26:04,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:04,199 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:26:04,241 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:04,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:04,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-15 01:26:04,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962429357] [2020-09-15 01:26:04,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:26:04,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:04,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:26:04,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:26:04,242 INFO L87 Difference]: Start difference. First operand 73 states and 178 transitions. Second operand 27 states. [2020-09-15 01:26:07,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:07,013 INFO L93 Difference]: Finished difference Result 132 states and 323 transitions. [2020-09-15 01:26:07,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-15 01:26:07,015 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 01:26:07,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:07,015 INFO L225 Difference]: With dead ends: 132 [2020-09-15 01:26:07,015 INFO L226 Difference]: Without dead ends: 127 [2020-09-15 01:26:07,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1649, Invalid=3463, Unknown=0, NotChecked=0, Total=5112 [2020-09-15 01:26:07,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-15 01:26:07,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2020-09-15 01:26:07,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-15 01:26:07,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 257 transitions. [2020-09-15 01:26:07,017 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 257 transitions. Word has length 30 [2020-09-15 01:26:07,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:07,017 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 257 transitions. [2020-09-15 01:26:07,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:26:07,017 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 257 transitions. [2020-09-15 01:26:07,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:07,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:07,018 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:07,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:07,218 INFO L427 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:07,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:07,219 INFO L82 PathProgramCache]: Analyzing trace with hash -2054759070, now seen corresponding path program 284 times [2020-09-15 01:26:07,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:07,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984023478] [2020-09-15 01:26:07,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:07,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984023478] [2020-09-15 01:26:07,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301388474] [2020-09-15 01:26:07,926 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:07,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:26:07,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:07,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:07,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:08,049 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:26:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:08,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:08,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:26:08,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373456308] [2020-09-15 01:26:08,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:26:08,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:08,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:26:08,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:26:08,104 INFO L87 Difference]: Start difference. First operand 100 states and 257 transitions. Second operand 28 states. [2020-09-15 01:26:11,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:11,116 INFO L93 Difference]: Finished difference Result 108 states and 277 transitions. [2020-09-15 01:26:11,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-15 01:26:11,117 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:26:11,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:11,117 INFO L225 Difference]: With dead ends: 108 [2020-09-15 01:26:11,118 INFO L226 Difference]: Without dead ends: 103 [2020-09-15 01:26:11,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1669, Invalid=3587, Unknown=0, NotChecked=0, Total=5256 [2020-09-15 01:26:11,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-15 01:26:11,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 74. [2020-09-15 01:26:11,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:26:11,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 182 transitions. [2020-09-15 01:26:11,120 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 182 transitions. Word has length 31 [2020-09-15 01:26:11,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:11,121 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 182 transitions. [2020-09-15 01:26:11,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:26:11,121 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 182 transitions. [2020-09-15 01:26:11,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:11,121 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:11,121 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:11,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:11,322 INFO L427 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:11,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:11,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1128130483, now seen corresponding path program 285 times [2020-09-15 01:26:11,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:11,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580486255] [2020-09-15 01:26:11,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:12,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580486255] [2020-09-15 01:26:12,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842299160] [2020-09-15 01:26:12,134 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:12,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-15 01:26:12,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:12,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:12,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:12,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:12,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 01:26:12,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983131598] [2020-09-15 01:26:12,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:26:12,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:12,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:26:12,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:26:12,226 INFO L87 Difference]: Start difference. First operand 74 states and 182 transitions. Second operand 27 states. [2020-09-15 01:26:13,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:13,648 INFO L93 Difference]: Finished difference Result 114 states and 265 transitions. [2020-09-15 01:26:13,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:26:13,649 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-15 01:26:13,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:13,650 INFO L225 Difference]: With dead ends: 114 [2020-09-15 01:26:13,650 INFO L226 Difference]: Without dead ends: 108 [2020-09-15 01:26:13,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=783, Invalid=1667, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 01:26:13,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-15 01:26:13,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2020-09-15 01:26:13,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 01:26:13,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 201 transitions. [2020-09-15 01:26:13,652 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 201 transitions. Word has length 31 [2020-09-15 01:26:13,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:13,652 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 201 transitions. [2020-09-15 01:26:13,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:26:13,652 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 201 transitions. [2020-09-15 01:26:13,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:13,653 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:13,653 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:13,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:13,854 INFO L427 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:13,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:13,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1342928561, now seen corresponding path program 286 times [2020-09-15 01:26:13,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:13,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578833175] [2020-09-15 01:26:13,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:14,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578833175] [2020-09-15 01:26:14,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236524180] [2020-09-15 01:26:14,679 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:14,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:26:14,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:14,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:14,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:14,793 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:26:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:14,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:14,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:26:14,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576909082] [2020-09-15 01:26:14,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:26:14,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:14,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:26:14,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:26:14,812 INFO L87 Difference]: Start difference. First operand 82 states and 201 transitions. Second operand 28 states. [2020-09-15 01:26:16,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:16,288 INFO L93 Difference]: Finished difference Result 138 states and 313 transitions. [2020-09-15 01:26:16,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:26:16,290 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:26:16,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:16,291 INFO L225 Difference]: With dead ends: 138 [2020-09-15 01:26:16,291 INFO L226 Difference]: Without dead ends: 132 [2020-09-15 01:26:16,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=792, Invalid=1860, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 01:26:16,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-15 01:26:16,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 80. [2020-09-15 01:26:16,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:26:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 197 transitions. [2020-09-15 01:26:16,293 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 197 transitions. Word has length 31 [2020-09-15 01:26:16,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:16,293 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 197 transitions. [2020-09-15 01:26:16,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:26:16,294 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 197 transitions. [2020-09-15 01:26:16,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:16,294 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:16,294 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:16,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-09-15 01:26:16,495 INFO L427 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:16,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:16,495 INFO L82 PathProgramCache]: Analyzing trace with hash 517654063, now seen corresponding path program 287 times [2020-09-15 01:26:16,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:16,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523360851] [2020-09-15 01:26:16,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:17,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523360851] [2020-09-15 01:26:17,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289728247] [2020-09-15 01:26:17,371 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:17,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-15 01:26:17,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:17,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:17,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:17,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:17,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 01:26:17,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461840225] [2020-09-15 01:26:17,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:26:17,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:17,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:26:17,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:26:17,468 INFO L87 Difference]: Start difference. First operand 80 states and 197 transitions. Second operand 27 states. [2020-09-15 01:26:18,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:18,905 INFO L93 Difference]: Finished difference Result 139 states and 317 transitions. [2020-09-15 01:26:18,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:26:18,907 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-15 01:26:18,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:18,907 INFO L225 Difference]: With dead ends: 139 [2020-09-15 01:26:18,908 INFO L226 Difference]: Without dead ends: 133 [2020-09-15 01:26:18,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=793, Invalid=1963, Unknown=0, NotChecked=0, Total=2756 [2020-09-15 01:26:18,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-15 01:26:18,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 83. [2020-09-15 01:26:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-15 01:26:18,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 205 transitions. [2020-09-15 01:26:18,910 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 205 transitions. Word has length 31 [2020-09-15 01:26:18,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:18,910 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 205 transitions. [2020-09-15 01:26:18,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:26:18,910 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 205 transitions. [2020-09-15 01:26:18,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:18,911 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:18,911 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:19,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-09-15 01:26:19,111 INFO L427 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:19,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:19,112 INFO L82 PathProgramCache]: Analyzing trace with hash -521114221, now seen corresponding path program 288 times [2020-09-15 01:26:19,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:19,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685256121] [2020-09-15 01:26:19,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:19,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685256121] [2020-09-15 01:26:19,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100476446] [2020-09-15 01:26:19,921 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 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:19,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-15 01:26:19,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:19,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:19,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:20,049 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:26:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:20,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:20,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:26:20,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476585139] [2020-09-15 01:26:20,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:26:20,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:20,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:26:20,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:26:20,070 INFO L87 Difference]: Start difference. First operand 83 states and 205 transitions. Second operand 28 states. [2020-09-15 01:26:21,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:21,652 INFO L93 Difference]: Finished difference Result 159 states and 357 transitions. [2020-09-15 01:26:21,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:26:21,654 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:26:21,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:21,654 INFO L225 Difference]: With dead ends: 159 [2020-09-15 01:26:21,654 INFO L226 Difference]: Without dead ends: 153 [2020-09-15 01:26:21,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=833, Invalid=2137, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 01:26:21,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-15 01:26:21,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 82. [2020-09-15 01:26:21,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 01:26:21,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 203 transitions. [2020-09-15 01:26:21,657 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 203 transitions. Word has length 31 [2020-09-15 01:26:21,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:21,657 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 203 transitions. [2020-09-15 01:26:21,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:26:21,657 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 203 transitions. [2020-09-15 01:26:21,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:21,657 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:21,658 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:21,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-09-15 01:26:21,858 INFO L427 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:21,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:21,859 INFO L82 PathProgramCache]: Analyzing trace with hash -106330991, now seen corresponding path program 289 times [2020-09-15 01:26:21,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:21,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598241908] [2020-09-15 01:26:21,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:22,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598241908] [2020-09-15 01:26:22,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922900566] [2020-09-15 01:26:22,592 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:22,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:22,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:22,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:22,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 01:26:22,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748486344] [2020-09-15 01:26:22,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:26:22,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:22,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:26:22,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:26:22,689 INFO L87 Difference]: Start difference. First operand 82 states and 203 transitions. Second operand 27 states. [2020-09-15 01:26:24,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:24,260 INFO L93 Difference]: Finished difference Result 159 states and 359 transitions. [2020-09-15 01:26:24,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:26:24,262 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-15 01:26:24,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:24,263 INFO L225 Difference]: With dead ends: 159 [2020-09-15 01:26:24,263 INFO L226 Difference]: Without dead ends: 153 [2020-09-15 01:26:24,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=848, Invalid=2232, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 01:26:24,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-15 01:26:24,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 85. [2020-09-15 01:26:24,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-15 01:26:24,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 211 transitions. [2020-09-15 01:26:24,265 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 211 transitions. Word has length 31 [2020-09-15 01:26:24,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:24,265 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 211 transitions. [2020-09-15 01:26:24,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:26:24,265 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 211 transitions. [2020-09-15 01:26:24,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:24,266 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:24,266 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:24,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:24,467 INFO L427 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:24,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:24,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1828080395, now seen corresponding path program 290 times [2020-09-15 01:26:24,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:24,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868576882] [2020-09-15 01:26:24,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:25,268 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:25,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868576882] [2020-09-15 01:26:25,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903100580] [2020-09-15 01:26:25,269 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:25,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:26:25,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:25,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:25,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:25,386 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:26:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:25,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:25,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:26:25,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107234400] [2020-09-15 01:26:25,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:26:25,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:25,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:26:25,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:26:25,406 INFO L87 Difference]: Start difference. First operand 85 states and 211 transitions. Second operand 28 states. [2020-09-15 01:26:27,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:27,050 INFO L93 Difference]: Finished difference Result 156 states and 353 transitions. [2020-09-15 01:26:27,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:26:27,052 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:26:27,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:27,053 INFO L225 Difference]: With dead ends: 156 [2020-09-15 01:26:27,053 INFO L226 Difference]: Without dead ends: 150 [2020-09-15 01:26:27,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=850, Invalid=2342, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 01:26:27,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-15 01:26:27,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 84. [2020-09-15 01:26:27,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-15 01:26:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 209 transitions. [2020-09-15 01:26:27,056 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 209 transitions. Word has length 31 [2020-09-15 01:26:27,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:27,056 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 209 transitions. [2020-09-15 01:26:27,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:26:27,056 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 209 transitions. [2020-09-15 01:26:27,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:27,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:27,056 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:27,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:27,257 INFO L427 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:27,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:27,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1282962291, now seen corresponding path program 291 times [2020-09-15 01:26:27,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:27,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653555831] [2020-09-15 01:26:27,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:27,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653555831] [2020-09-15 01:26:27,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569309831] [2020-09-15 01:26:27,996 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:28,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-15 01:26:28,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:28,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:28,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:28,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:28,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 01:26:28,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527594604] [2020-09-15 01:26:28,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:26:28,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:28,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:26:28,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:26:28,098 INFO L87 Difference]: Start difference. First operand 84 states and 209 transitions. Second operand 27 states. [2020-09-15 01:26:29,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:29,728 INFO L93 Difference]: Finished difference Result 157 states and 357 transitions. [2020-09-15 01:26:29,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:26:29,730 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-15 01:26:29,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:29,730 INFO L225 Difference]: With dead ends: 157 [2020-09-15 01:26:29,730 INFO L226 Difference]: Without dead ends: 151 [2020-09-15 01:26:29,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=880, Invalid=2426, Unknown=0, NotChecked=0, Total=3306 [2020-09-15 01:26:29,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-15 01:26:29,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 87. [2020-09-15 01:26:29,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:26:29,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 217 transitions. [2020-09-15 01:26:29,732 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 217 transitions. Word has length 31 [2020-09-15 01:26:29,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:29,732 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 217 transitions. [2020-09-15 01:26:29,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:26:29,732 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 217 transitions. [2020-09-15 01:26:29,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:29,733 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:29,733 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:29,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:29,934 INFO L427 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:29,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:29,934 INFO L82 PathProgramCache]: Analyzing trace with hash -265196329, now seen corresponding path program 292 times [2020-09-15 01:26:29,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:29,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680841520] [2020-09-15 01:26:29,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:30,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680841520] [2020-09-15 01:26:30,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887336211] [2020-09-15 01:26:30,641 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 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:30,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:26:30,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:30,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:30,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:30,767 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:26:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:30,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:30,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:26:30,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158787975] [2020-09-15 01:26:30,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:26:30,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:30,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:26:30,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:26:30,796 INFO L87 Difference]: Start difference. First operand 87 states and 217 transitions. Second operand 28 states. [2020-09-15 01:26:32,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:32,799 INFO L93 Difference]: Finished difference Result 154 states and 351 transitions. [2020-09-15 01:26:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:26:32,801 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:26:32,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:32,802 INFO L225 Difference]: With dead ends: 154 [2020-09-15 01:26:32,802 INFO L226 Difference]: Without dead ends: 148 [2020-09-15 01:26:32,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=883, Invalid=2539, Unknown=0, NotChecked=0, Total=3422 [2020-09-15 01:26:32,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-15 01:26:32,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 86. [2020-09-15 01:26:32,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:26:32,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 215 transitions. [2020-09-15 01:26:32,804 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 215 transitions. Word has length 31 [2020-09-15 01:26:32,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:32,804 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 215 transitions. [2020-09-15 01:26:32,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:26:32,804 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 215 transitions. [2020-09-15 01:26:32,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:32,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:32,805 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:33,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2020-09-15 01:26:33,008 INFO L427 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:33,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:33,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1566985515, now seen corresponding path program 293 times [2020-09-15 01:26:33,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:33,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158013955] [2020-09-15 01:26:33,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:33,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158013955] [2020-09-15 01:26:33,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624546092] [2020-09-15 01:26:33,813 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:33,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-15 01:26:33,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:33,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:33,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:33,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:33,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 01:26:33,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960633950] [2020-09-15 01:26:33,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:26:33,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:33,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:26:33,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:26:33,928 INFO L87 Difference]: Start difference. First operand 86 states and 215 transitions. Second operand 27 states. [2020-09-15 01:26:35,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:35,879 INFO L93 Difference]: Finished difference Result 155 states and 355 transitions. [2020-09-15 01:26:35,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:26:35,881 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-15 01:26:35,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:35,881 INFO L225 Difference]: With dead ends: 155 [2020-09-15 01:26:35,882 INFO L226 Difference]: Without dead ends: 149 [2020-09-15 01:26:35,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=928, Invalid=2612, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 01:26:35,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-15 01:26:35,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 89. [2020-09-15 01:26:35,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-15 01:26:35,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 223 transitions. [2020-09-15 01:26:35,884 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 223 transitions. Word has length 31 [2020-09-15 01:26:35,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:35,884 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 223 transitions. [2020-09-15 01:26:35,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:26:35,884 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 223 transitions. [2020-09-15 01:26:35,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:35,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:35,885 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:36,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:36,092 INFO L427 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:36,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:36,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1917433145, now seen corresponding path program 294 times [2020-09-15 01:26:36,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:36,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676480956] [2020-09-15 01:26:36,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:36,797 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:36,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676480956] [2020-09-15 01:26:36,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793700791] [2020-09-15 01:26:36,798 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 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:36,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-15 01:26:36,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:36,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:36,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:36,916 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:26:36,939 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:36,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:36,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:26:36,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623799840] [2020-09-15 01:26:36,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:26:36,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:36,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:26:36,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:26:36,941 INFO L87 Difference]: Start difference. First operand 89 states and 223 transitions. Second operand 28 states. [2020-09-15 01:26:38,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:38,975 INFO L93 Difference]: Finished difference Result 152 states and 349 transitions. [2020-09-15 01:26:38,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:26:38,976 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:26:38,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:38,977 INFO L225 Difference]: With dead ends: 152 [2020-09-15 01:26:38,977 INFO L226 Difference]: Without dead ends: 146 [2020-09-15 01:26:38,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=932, Invalid=2728, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 01:26:38,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-15 01:26:38,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 88. [2020-09-15 01:26:38,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-15 01:26:38,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 221 transitions. [2020-09-15 01:26:38,980 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 221 transitions. Word has length 31 [2020-09-15 01:26:38,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:38,980 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 221 transitions. [2020-09-15 01:26:38,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:26:38,980 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 221 transitions. [2020-09-15 01:26:38,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:38,981 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:38,981 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:39,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:39,181 INFO L427 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:39,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:39,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1969709751, now seen corresponding path program 295 times [2020-09-15 01:26:39,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:39,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188630427] [2020-09-15 01:26:39,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:39,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188630427] [2020-09-15 01:26:39,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820926272] [2020-09-15 01:26:39,869 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 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:39,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:39,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:39,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:39,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 01:26:39,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120120266] [2020-09-15 01:26:39,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:26:39,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:39,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:26:39,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:26:39,970 INFO L87 Difference]: Start difference. First operand 88 states and 221 transitions. Second operand 27 states. [2020-09-15 01:26:41,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:41,854 INFO L93 Difference]: Finished difference Result 153 states and 353 transitions. [2020-09-15 01:26:41,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:26:41,856 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-15 01:26:41,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:41,856 INFO L225 Difference]: With dead ends: 153 [2020-09-15 01:26:41,856 INFO L226 Difference]: Without dead ends: 147 [2020-09-15 01:26:41,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=992, Invalid=2790, Unknown=0, NotChecked=0, Total=3782 [2020-09-15 01:26:41,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-15 01:26:41,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 91. [2020-09-15 01:26:41,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-15 01:26:41,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 229 transitions. [2020-09-15 01:26:41,859 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 229 transitions. Word has length 31 [2020-09-15 01:26:41,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:41,859 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 229 transitions. [2020-09-15 01:26:41,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:26:41,860 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 229 transitions. [2020-09-15 01:26:41,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:41,860 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:41,860 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:42,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:42,061 INFO L427 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:42,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:42,061 INFO L82 PathProgramCache]: Analyzing trace with hash -449008101, now seen corresponding path program 296 times [2020-09-15 01:26:42,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:42,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558100667] [2020-09-15 01:26:42,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:42,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558100667] [2020-09-15 01:26:42,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548998568] [2020-09-15 01:26:42,799 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 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:42,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:26:42,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:42,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:42,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:42,921 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:26:42,949 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:42,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:42,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:26:42,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66341120] [2020-09-15 01:26:42,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:26:42,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:42,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:26:42,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:26:42,950 INFO L87 Difference]: Start difference. First operand 91 states and 229 transitions. Second operand 28 states. [2020-09-15 01:26:45,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:45,227 INFO L93 Difference]: Finished difference Result 150 states and 347 transitions. [2020-09-15 01:26:45,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:26:45,229 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:26:45,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:45,230 INFO L225 Difference]: With dead ends: 150 [2020-09-15 01:26:45,230 INFO L226 Difference]: Without dead ends: 144 [2020-09-15 01:26:45,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=997, Invalid=2909, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 01:26:45,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-15 01:26:45,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 90. [2020-09-15 01:26:45,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-15 01:26:45,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 227 transitions. [2020-09-15 01:26:45,233 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 227 transitions. Word has length 31 [2020-09-15 01:26:45,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:45,233 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 227 transitions. [2020-09-15 01:26:45,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:26:45,234 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 227 transitions. [2020-09-15 01:26:45,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:45,234 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:45,234 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:45,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:45,436 INFO L427 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:45,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:45,437 INFO L82 PathProgramCache]: Analyzing trace with hash 239313689, now seen corresponding path program 297 times [2020-09-15 01:26:45,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:45,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365998369] [2020-09-15 01:26:45,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:46,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365998369] [2020-09-15 01:26:46,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773497564] [2020-09-15 01:26:46,137 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 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:46,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-15 01:26:46,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:46,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:46,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:46,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:46,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 01:26:46,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486947403] [2020-09-15 01:26:46,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:26:46,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:46,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:26:46,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:26:46,251 INFO L87 Difference]: Start difference. First operand 90 states and 227 transitions. Second operand 27 states. [2020-09-15 01:26:48,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:48,150 INFO L93 Difference]: Finished difference Result 151 states and 351 transitions. [2020-09-15 01:26:48,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-15 01:26:48,152 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-15 01:26:48,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:48,152 INFO L225 Difference]: With dead ends: 151 [2020-09-15 01:26:48,152 INFO L226 Difference]: Without dead ends: 145 [2020-09-15 01:26:48,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1072, Invalid=2960, Unknown=0, NotChecked=0, Total=4032 [2020-09-15 01:26:48,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-15 01:26:48,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 93. [2020-09-15 01:26:48,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:26:48,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 235 transitions. [2020-09-15 01:26:48,154 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 235 transitions. Word has length 31 [2020-09-15 01:26:48,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:48,154 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 235 transitions. [2020-09-15 01:26:48,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:26:48,154 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 235 transitions. [2020-09-15 01:26:48,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:48,154 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:48,155 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:48,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:48,355 INFO L427 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:48,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:48,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1224505213, now seen corresponding path program 298 times [2020-09-15 01:26:48,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:48,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880681829] [2020-09-15 01:26:48,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:48,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880681829] [2020-09-15 01:26:48,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712188806] [2020-09-15 01:26:48,981 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:49,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:26:49,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:49,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:49,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:49,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:26:49,114 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:49,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:49,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:26:49,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804620759] [2020-09-15 01:26:49,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:26:49,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:49,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:26:49,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:26:49,115 INFO L87 Difference]: Start difference. First operand 93 states and 235 transitions. Second operand 28 states. [2020-09-15 01:26:51,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:51,286 INFO L93 Difference]: Finished difference Result 148 states and 345 transitions. [2020-09-15 01:26:51,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 01:26:51,288 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:26:51,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:51,289 INFO L225 Difference]: With dead ends: 148 [2020-09-15 01:26:51,289 INFO L226 Difference]: Without dead ends: 142 [2020-09-15 01:26:51,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1078, Invalid=3082, Unknown=0, NotChecked=0, Total=4160 [2020-09-15 01:26:51,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-15 01:26:51,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 92. [2020-09-15 01:26:51,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:26:51,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 233 transitions. [2020-09-15 01:26:51,292 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 233 transitions. Word has length 31 [2020-09-15 01:26:51,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:51,292 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 233 transitions. [2020-09-15 01:26:51,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:26:51,292 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 233 transitions. [2020-09-15 01:26:51,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:51,293 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:51,293 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:51,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-09-15 01:26:51,501 INFO L427 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:51,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:51,502 INFO L82 PathProgramCache]: Analyzing trace with hash -392653829, now seen corresponding path program 299 times [2020-09-15 01:26:51,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:51,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458028276] [2020-09-15 01:26:51,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:51,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:52,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458028276] [2020-09-15 01:26:52,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634497632] [2020-09-15 01:26:52,112 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:52,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-15 01:26:52,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:52,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:52,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:52,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:52,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 01:26:52,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677709828] [2020-09-15 01:26:52,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:26:52,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:52,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:26:52,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:26:52,220 INFO L87 Difference]: Start difference. First operand 92 states and 233 transitions. Second operand 27 states. [2020-09-15 01:26:54,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:54,184 INFO L93 Difference]: Finished difference Result 149 states and 349 transitions. [2020-09-15 01:26:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-15 01:26:54,185 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-15 01:26:54,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:54,186 INFO L225 Difference]: With dead ends: 149 [2020-09-15 01:26:54,186 INFO L226 Difference]: Without dead ends: 143 [2020-09-15 01:26:54,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1168, Invalid=3122, Unknown=0, NotChecked=0, Total=4290 [2020-09-15 01:26:54,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-15 01:26:54,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 95. [2020-09-15 01:26:54,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-15 01:26:54,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 241 transitions. [2020-09-15 01:26:54,188 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 241 transitions. Word has length 31 [2020-09-15 01:26:54,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:54,188 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 241 transitions. [2020-09-15 01:26:54,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:26:54,188 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 241 transitions. [2020-09-15 01:26:54,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:54,189 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:54,189 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:54,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2020-09-15 01:26:54,390 INFO L427 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:54,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:54,390 INFO L82 PathProgramCache]: Analyzing trace with hash 864235871, now seen corresponding path program 300 times [2020-09-15 01:26:54,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:54,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247224369] [2020-09-15 01:26:54,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:55,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247224369] [2020-09-15 01:26:55,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371351721] [2020-09-15 01:26:55,005 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:55,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-15 01:26:55,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:55,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:55,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:55,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:26:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:55,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:55,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:26:55,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45389919] [2020-09-15 01:26:55,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:26:55,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:55,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:26:55,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:26:55,151 INFO L87 Difference]: Start difference. First operand 95 states and 241 transitions. Second operand 28 states. [2020-09-15 01:26:57,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:57,447 INFO L93 Difference]: Finished difference Result 146 states and 343 transitions. [2020-09-15 01:26:57,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 01:26:57,449 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:26:57,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:57,449 INFO L225 Difference]: With dead ends: 146 [2020-09-15 01:26:57,449 INFO L226 Difference]: Without dead ends: 140 [2020-09-15 01:26:57,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1175, Invalid=3247, Unknown=0, NotChecked=0, Total=4422 [2020-09-15 01:26:57,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-15 01:26:57,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 94. [2020-09-15 01:26:57,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-15 01:26:57,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 239 transitions. [2020-09-15 01:26:57,452 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 239 transitions. Word has length 31 [2020-09-15 01:26:57,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:57,452 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 239 transitions. [2020-09-15 01:26:57,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:26:57,452 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 239 transitions. [2020-09-15 01:26:57,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:57,453 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:57,453 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:57,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2020-09-15 01:26:57,654 INFO L427 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:57,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:57,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1814538915, now seen corresponding path program 301 times [2020-09-15 01:26:57,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:57,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273577580] [2020-09-15 01:26:57,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:58,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273577580] [2020-09-15 01:26:58,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781559550] [2020-09-15 01:26:58,257 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 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:58,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:58,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:58,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:58,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 01:26:58,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98735480] [2020-09-15 01:26:58,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:26:58,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:58,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:26:58,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:26:58,368 INFO L87 Difference]: Start difference. First operand 94 states and 239 transitions. Second operand 27 states. [2020-09-15 01:27:00,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:00,859 INFO L93 Difference]: Finished difference Result 147 states and 347 transitions. [2020-09-15 01:27:00,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-15 01:27:00,861 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-15 01:27:00,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:00,861 INFO L225 Difference]: With dead ends: 147 [2020-09-15 01:27:00,861 INFO L226 Difference]: Without dead ends: 141 [2020-09-15 01:27:00,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1280, Invalid=3276, Unknown=0, NotChecked=0, Total=4556 [2020-09-15 01:27:00,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-15 01:27:00,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 97. [2020-09-15 01:27:00,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-15 01:27:00,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 247 transitions. [2020-09-15 01:27:00,863 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 247 transitions. Word has length 31 [2020-09-15 01:27:00,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:00,863 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 247 transitions. [2020-09-15 01:27:00,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:27:00,864 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 247 transitions. [2020-09-15 01:27:00,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:27:00,864 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:00,864 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:01,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:01,065 INFO L427 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:01,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:01,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1294795839, now seen corresponding path program 302 times [2020-09-15 01:27:01,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:01,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355400753] [2020-09-15 01:27:01,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:01,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355400753] [2020-09-15 01:27:01,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917544920] [2020-09-15 01:27:01,818 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 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:01,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:27:01,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:01,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:27:01,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:01,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:27:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:01,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:01,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:27:01,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858147422] [2020-09-15 01:27:01,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:27:01,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:01,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:27:01,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:27:01,976 INFO L87 Difference]: Start difference. First operand 97 states and 247 transitions. Second operand 28 states. [2020-09-15 01:27:04,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:04,995 INFO L93 Difference]: Finished difference Result 144 states and 341 transitions. [2020-09-15 01:27:04,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-15 01:27:04,998 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:27:04,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:04,998 INFO L225 Difference]: With dead ends: 144 [2020-09-15 01:27:04,998 INFO L226 Difference]: Without dead ends: 138 [2020-09-15 01:27:04,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1288, Invalid=3404, Unknown=0, NotChecked=0, Total=4692 [2020-09-15 01:27:04,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-15 01:27:05,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 96. [2020-09-15 01:27:05,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-15 01:27:05,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 245 transitions. [2020-09-15 01:27:05,001 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 245 transitions. Word has length 31 [2020-09-15 01:27:05,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:05,001 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 245 transitions. [2020-09-15 01:27:05,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:27:05,001 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 245 transitions. [2020-09-15 01:27:05,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:27:05,001 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:05,001 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:05,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2020-09-15 01:27:05,202 INFO L427 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:05,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:05,203 INFO L82 PathProgramCache]: Analyzing trace with hash 360515391, now seen corresponding path program 303 times [2020-09-15 01:27:05,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:05,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699003672] [2020-09-15 01:27:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:05,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699003672] [2020-09-15 01:27:05,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867165314] [2020-09-15 01:27:05,935 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 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:06,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-15 01:27:06,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:06,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:27:06,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:06,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:06,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 01:27:06,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602002746] [2020-09-15 01:27:06,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:27:06,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:06,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:27:06,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:27:06,061 INFO L87 Difference]: Start difference. First operand 96 states and 245 transitions. Second operand 27 states. [2020-09-15 01:27:08,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:08,719 INFO L93 Difference]: Finished difference Result 145 states and 345 transitions. [2020-09-15 01:27:08,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-15 01:27:08,721 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-15 01:27:08,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:08,722 INFO L225 Difference]: With dead ends: 145 [2020-09-15 01:27:08,722 INFO L226 Difference]: Without dead ends: 139 [2020-09-15 01:27:08,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1408, Invalid=3422, Unknown=0, NotChecked=0, Total=4830 [2020-09-15 01:27:08,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-15 01:27:08,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 99. [2020-09-15 01:27:08,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:27:08,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-15 01:27:08,725 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 31 [2020-09-15 01:27:08,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:08,725 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-15 01:27:08,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:27:08,726 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-15 01:27:08,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:27:08,726 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:08,726 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:08,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:08,927 INFO L427 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:08,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:08,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1359612253, now seen corresponding path program 304 times [2020-09-15 01:27:08,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:08,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666531650] [2020-09-15 01:27:08,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:09,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666531650] [2020-09-15 01:27:09,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135558808] [2020-09-15 01:27:09,615 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 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:09,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:27:09,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:09,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:27:09,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:09,743 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:27:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:09,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:09,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:27:09,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137459965] [2020-09-15 01:27:09,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:27:09,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:09,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:27:09,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:27:09,782 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 28 states. [2020-09-15 01:27:12,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:12,856 INFO L93 Difference]: Finished difference Result 142 states and 339 transitions. [2020-09-15 01:27:12,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-15 01:27:12,858 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:27:12,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:12,859 INFO L225 Difference]: With dead ends: 142 [2020-09-15 01:27:12,859 INFO L226 Difference]: Without dead ends: 136 [2020-09-15 01:27:12,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1417, Invalid=3553, Unknown=0, NotChecked=0, Total=4970 [2020-09-15 01:27:12,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-15 01:27:12,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 98. [2020-09-15 01:27:12,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:27:12,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-15 01:27:12,862 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 31 [2020-09-15 01:27:12,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:12,862 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-15 01:27:12,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:27:12,862 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-15 01:27:12,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:27:12,862 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:12,862 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:13,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2020-09-15 01:27:13,063 INFO L427 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:13,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:13,064 INFO L82 PathProgramCache]: Analyzing trace with hash -888616543, now seen corresponding path program 305 times [2020-09-15 01:27:13,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:13,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795106597] [2020-09-15 01:27:13,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:13,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795106597] [2020-09-15 01:27:13,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203557533] [2020-09-15 01:27:13,776 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 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:13,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-15 01:27:13,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:13,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:27:13,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:13,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:13,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 01:27:13,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214354666] [2020-09-15 01:27:13,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:27:13,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:13,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:27:13,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:27:13,902 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 27 states. [2020-09-15 01:27:16,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:16,621 INFO L93 Difference]: Finished difference Result 143 states and 343 transitions. [2020-09-15 01:27:16,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-09-15 01:27:16,623 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-15 01:27:16,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:16,623 INFO L225 Difference]: With dead ends: 143 [2020-09-15 01:27:16,623 INFO L226 Difference]: Without dead ends: 137 [2020-09-15 01:27:16,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1552, Invalid=3560, Unknown=0, NotChecked=0, Total=5112 [2020-09-15 01:27:16,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-15 01:27:16,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 101. [2020-09-15 01:27:16,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-15 01:27:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 259 transitions. [2020-09-15 01:27:16,626 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 259 transitions. Word has length 31 [2020-09-15 01:27:16,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:16,626 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 259 transitions. [2020-09-15 01:27:16,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:27:16,627 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 259 transitions. [2020-09-15 01:27:16,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:27:16,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:16,627 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:16,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:16,828 INFO L427 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:16,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:16,828 INFO L82 PathProgramCache]: Analyzing trace with hash -872529403, now seen corresponding path program 306 times [2020-09-15 01:27:16,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:16,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222873748] [2020-09-15 01:27:16,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:17,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222873748] [2020-09-15 01:27:17,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577761833] [2020-09-15 01:27:17,520 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 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:17,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-15 01:27:17,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:17,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:27:17,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:17,654 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:27:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:17,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:17,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:27:17,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622994741] [2020-09-15 01:27:17,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:27:17,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:17,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:27:17,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:27:17,693 INFO L87 Difference]: Start difference. First operand 101 states and 259 transitions. Second operand 28 states. [2020-09-15 01:27:20,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:20,955 INFO L93 Difference]: Finished difference Result 140 states and 337 transitions. [2020-09-15 01:27:20,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-15 01:27:20,957 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:27:20,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:20,958 INFO L225 Difference]: With dead ends: 140 [2020-09-15 01:27:20,958 INFO L226 Difference]: Without dead ends: 134 [2020-09-15 01:27:20,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1562, Invalid=3694, Unknown=0, NotChecked=0, Total=5256 [2020-09-15 01:27:20,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-15 01:27:20,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 100. [2020-09-15 01:27:20,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-15 01:27:20,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 257 transitions. [2020-09-15 01:27:20,960 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 257 transitions. Word has length 31 [2020-09-15 01:27:20,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:20,961 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 257 transitions. [2020-09-15 01:27:20,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:27:20,961 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 257 transitions. [2020-09-15 01:27:20,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:27:20,961 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:20,961 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:21,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:21,162 INFO L427 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:21,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:21,162 INFO L82 PathProgramCache]: Analyzing trace with hash -872039293, now seen corresponding path program 307 times [2020-09-15 01:27:21,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:21,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434234630] [2020-09-15 01:27:21,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:21,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434234630] [2020-09-15 01:27:21,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886703467] [2020-09-15 01:27:21,879 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 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:21,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:27:21,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:22,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:22,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 01:27:22,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129337090] [2020-09-15 01:27:22,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:27:22,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:22,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:27:22,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:27:22,005 INFO L87 Difference]: Start difference. First operand 100 states and 257 transitions. Second operand 27 states. [2020-09-15 01:27:24,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:24,842 INFO L93 Difference]: Finished difference Result 160 states and 387 transitions. [2020-09-15 01:27:24,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-15 01:27:24,844 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-15 01:27:24,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:24,845 INFO L225 Difference]: With dead ends: 160 [2020-09-15 01:27:24,845 INFO L226 Difference]: Without dead ends: 154 [2020-09-15 01:27:24,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1712, Invalid=3690, Unknown=0, NotChecked=0, Total=5402 [2020-09-15 01:27:24,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-15 01:27:24,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 106. [2020-09-15 01:27:24,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-15 01:27:24,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 277 transitions. [2020-09-15 01:27:24,848 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 277 transitions. Word has length 31 [2020-09-15 01:27:24,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:24,848 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 277 transitions. [2020-09-15 01:27:24,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:27:24,848 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 277 transitions. [2020-09-15 01:27:24,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:27:24,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:24,848 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:25,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2020-09-15 01:27:25,049 INFO L427 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:25,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:25,050 INFO L82 PathProgramCache]: Analyzing trace with hash -872022553, now seen corresponding path program 308 times [2020-09-15 01:27:25,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:25,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384485889] [2020-09-15 01:27:25,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:25,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384485889] [2020-09-15 01:27:25,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512198230] [2020-09-15 01:27:25,746 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 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:25,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:27:25,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:25,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:27:25,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:25,866 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:27:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:25,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:25,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:27:25,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6627968] [2020-09-15 01:27:25,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:27:25,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:25,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:27:25,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:27:25,903 INFO L87 Difference]: Start difference. First operand 106 states and 277 transitions. Second operand 28 states. [2020-09-15 01:27:29,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:29,268 INFO L93 Difference]: Finished difference Result 141 states and 343 transitions. [2020-09-15 01:27:29,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-15 01:27:29,270 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:27:29,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:29,271 INFO L225 Difference]: With dead ends: 141 [2020-09-15 01:27:29,271 INFO L226 Difference]: Without dead ends: 133 [2020-09-15 01:27:29,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1723, Invalid=3827, Unknown=0, NotChecked=0, Total=5550 [2020-09-15 01:27:29,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-15 01:27:29,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 103. [2020-09-15 01:27:29,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-15 01:27:29,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 265 transitions. [2020-09-15 01:27:29,273 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 265 transitions. Word has length 31 [2020-09-15 01:27:29,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:29,274 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 265 transitions. [2020-09-15 01:27:29,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:27:29,274 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 265 transitions. [2020-09-15 01:27:29,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:27:29,274 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:29,274 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:29,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:29,475 INFO L427 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:29,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:29,475 INFO L82 PathProgramCache]: Analyzing trace with hash 470887608, now seen corresponding path program 309 times [2020-09-15 01:27:29,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:29,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408280140] [2020-09-15 01:27:29,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:30,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408280140] [2020-09-15 01:27:30,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928162643] [2020-09-15 01:27:30,459 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 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:30,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-15 01:27:30,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:30,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:27:30,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:30,561 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:30,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:30,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 01:27:30,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224272915] [2020-09-15 01:27:30,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:27:30,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:30,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:27:30,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:27:30,562 INFO L87 Difference]: Start difference. First operand 103 states and 265 transitions. Second operand 28 states. [2020-09-15 01:27:32,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:32,041 INFO L93 Difference]: Finished difference Result 164 states and 387 transitions. [2020-09-15 01:27:32,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:27:32,043 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-15 01:27:32,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:32,044 INFO L225 Difference]: With dead ends: 164 [2020-09-15 01:27:32,044 INFO L226 Difference]: Without dead ends: 158 [2020-09-15 01:27:32,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=841, Invalid=1915, Unknown=0, NotChecked=0, Total=2756 [2020-09-15 01:27:32,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-09-15 01:27:32,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 105. [2020-09-15 01:27:32,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:27:32,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-15 01:27:32,047 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-15 01:27:32,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:32,047 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-15 01:27:32,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:27:32,047 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-15 01:27:32,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:27:32,047 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:32,047 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:32,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2020-09-15 01:27:32,248 INFO L427 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:32,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:32,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1353020644, now seen corresponding path program 310 times [2020-09-15 01:27:32,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:32,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896761189] [2020-09-15 01:27:32,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:33,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896761189] [2020-09-15 01:27:33,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132102326] [2020-09-15 01:27:33,266 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 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:33,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:27:33,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:33,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:27:33,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:33,398 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:27:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:33,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:33,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:27:33,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403469559] [2020-09-15 01:27:33,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:27:33,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:33,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:27:33,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:27:33,420 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-15 01:27:35,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:35,244 INFO L93 Difference]: Finished difference Result 161 states and 381 transitions. [2020-09-15 01:27:35,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:27:35,246 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:27:35,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:35,246 INFO L225 Difference]: With dead ends: 161 [2020-09-15 01:27:35,247 INFO L226 Difference]: Without dead ends: 155 [2020-09-15 01:27:35,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=897, Invalid=2183, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 01:27:35,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-15 01:27:35,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 104. [2020-09-15 01:27:35,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:27:35,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-15 01:27:35,249 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-15 01:27:35,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:35,249 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-15 01:27:35,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:27:35,249 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-15 01:27:35,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:27:35,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:35,250 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:35,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2020-09-15 01:27:35,451 INFO L427 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:35,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:35,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2116672154, now seen corresponding path program 311 times [2020-09-15 01:27:35,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:35,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208779890] [2020-09-15 01:27:35,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:36,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208779890] [2020-09-15 01:27:36,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461336508] [2020-09-15 01:27:36,400 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 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:36,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-15 01:27:36,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:36,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:27:36,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:36,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:36,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 01:27:36,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240316886] [2020-09-15 01:27:36,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:27:36,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:36,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:27:36,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:27:36,498 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-15 01:27:38,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:38,168 INFO L93 Difference]: Finished difference Result 158 states and 375 transitions. [2020-09-15 01:27:38,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:27:38,170 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-15 01:27:38,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:38,170 INFO L225 Difference]: With dead ends: 158 [2020-09-15 01:27:38,171 INFO L226 Difference]: Without dead ends: 152 [2020-09-15 01:27:38,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=842, Invalid=2128, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 01:27:38,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-15 01:27:38,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 105. [2020-09-15 01:27:38,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:27:38,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-15 01:27:38,173 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-15 01:27:38,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:38,174 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-15 01:27:38,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:27:38,174 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-15 01:27:38,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:27:38,174 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:38,174 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:38,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2020-09-15 01:27:38,375 INFO L427 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:38,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:38,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1077903870, now seen corresponding path program 312 times [2020-09-15 01:27:38,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:38,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770125783] [2020-09-15 01:27:38,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:39,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770125783] [2020-09-15 01:27:39,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991577046] [2020-09-15 01:27:39,358 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 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:39,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-15 01:27:39,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:39,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:27:39,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:39,499 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:27:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:39,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:39,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:27:39,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872047695] [2020-09-15 01:27:39,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:27:39,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:39,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:27:39,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:27:39,523 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-15 01:27:41,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:41,618 INFO L93 Difference]: Finished difference Result 157 states and 373 transitions. [2020-09-15 01:27:41,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:27:41,620 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:27:41,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:41,621 INFO L225 Difference]: With dead ends: 157 [2020-09-15 01:27:41,621 INFO L226 Difference]: Without dead ends: 151 [2020-09-15 01:27:41,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=905, Invalid=2401, Unknown=0, NotChecked=0, Total=3306 [2020-09-15 01:27:41,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-15 01:27:41,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 104. [2020-09-15 01:27:41,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:27:41,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-15 01:27:41,624 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-15 01:27:41,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:41,624 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-15 01:27:41,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:27:41,624 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-15 01:27:41,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:27:41,624 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:41,624 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:41,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2020-09-15 01:27:41,825 INFO L427 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:41,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:41,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1492687100, now seen corresponding path program 313 times [2020-09-15 01:27:41,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:41,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963745465] [2020-09-15 01:27:41,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:42,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963745465] [2020-09-15 01:27:42,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232401306] [2020-09-15 01:27:42,773 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 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:42,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:27:42,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:42,875 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:42,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:42,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 01:27:42,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266853456] [2020-09-15 01:27:42,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:27:42,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:42,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:27:42,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:27:42,876 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-15 01:27:44,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:44,758 INFO L93 Difference]: Finished difference Result 154 states and 367 transitions. [2020-09-15 01:27:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:27:44,760 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-15 01:27:44,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:44,760 INFO L225 Difference]: With dead ends: 154 [2020-09-15 01:27:44,761 INFO L226 Difference]: Without dead ends: 148 [2020-09-15 01:27:44,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=859, Invalid=2333, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 01:27:44,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-15 01:27:44,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 105. [2020-09-15 01:27:44,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:27:44,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-15 01:27:44,763 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-15 01:27:44,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:44,764 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-15 01:27:44,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:27:44,764 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-15 01:27:44,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:27:44,764 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:44,764 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:44,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:44,965 INFO L427 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:44,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:44,966 INFO L82 PathProgramCache]: Analyzing trace with hash -229062304, now seen corresponding path program 314 times [2020-09-15 01:27:44,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:44,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167191659] [2020-09-15 01:27:44,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:45,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167191659] [2020-09-15 01:27:45,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104229536] [2020-09-15 01:27:45,889 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 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:45,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:27:45,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:45,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:27:45,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:46,012 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:27:46,037 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:46,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:46,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:27:46,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910759270] [2020-09-15 01:27:46,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:27:46,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:46,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:27:46,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:27:46,039 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-15 01:27:48,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:48,271 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-09-15 01:27:48,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:27:48,273 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:27:48,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:48,273 INFO L225 Difference]: With dead ends: 153 [2020-09-15 01:27:48,274 INFO L226 Difference]: Without dead ends: 147 [2020-09-15 01:27:48,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 01:27:48,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-15 01:27:48,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 104. [2020-09-15 01:27:48,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:27:48,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-15 01:27:48,276 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-15 01:27:48,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:48,276 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-15 01:27:48,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:27:48,276 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-15 01:27:48,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:27:48,277 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:48,277 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:48,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2020-09-15 01:27:48,477 INFO L427 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:48,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:48,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1412986914, now seen corresponding path program 315 times [2020-09-15 01:27:48,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:48,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682785418] [2020-09-15 01:27:48,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:48,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:49,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682785418] [2020-09-15 01:27:49,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842958549] [2020-09-15 01:27:49,362 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 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:49,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-15 01:27:49,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:49,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:27:49,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:49,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:49,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 01:27:49,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45957146] [2020-09-15 01:27:49,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:27:49,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:49,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:27:49,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:27:49,471 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-15 01:27:51,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:51,490 INFO L93 Difference]: Finished difference Result 150 states and 359 transitions. [2020-09-15 01:27:51,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:27:51,492 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-15 01:27:51,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:51,492 INFO L225 Difference]: With dead ends: 150 [2020-09-15 01:27:51,492 INFO L226 Difference]: Without dead ends: 144 [2020-09-15 01:27:51,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=892, Invalid=2530, Unknown=0, NotChecked=0, Total=3422 [2020-09-15 01:27:51,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-15 01:27:51,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 105. [2020-09-15 01:27:51,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:27:51,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-15 01:27:51,495 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-15 01:27:51,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:51,495 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-15 01:27:51,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:27:51,496 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-15 01:27:51,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:27:51,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:51,496 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:51,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2020-09-15 01:27:51,697 INFO L427 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:51,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:51,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1333821762, now seen corresponding path program 316 times [2020-09-15 01:27:51,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:51,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888410111] [2020-09-15 01:27:51,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:52,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888410111] [2020-09-15 01:27:52,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993187660] [2020-09-15 01:27:52,622 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 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:52,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:27:52,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:52,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:27:52,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:52,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:27:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:52,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:52,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:27:52,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193565588] [2020-09-15 01:27:52,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:27:52,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:52,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:27:52,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:27:52,786 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-15 01:27:55,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:55,224 INFO L93 Difference]: Finished difference Result 149 states and 357 transitions. [2020-09-15 01:27:55,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:27:55,227 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:27:55,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:55,227 INFO L225 Difference]: With dead ends: 149 [2020-09-15 01:27:55,227 INFO L226 Difference]: Without dead ends: 143 [2020-09-15 01:27:55,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=969, Invalid=2813, Unknown=0, NotChecked=0, Total=3782 [2020-09-15 01:27:55,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-15 01:27:55,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2020-09-15 01:27:55,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:27:55,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-15 01:27:55,230 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-15 01:27:55,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:55,230 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-15 01:27:55,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:27:55,230 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-15 01:27:55,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:27:55,230 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:55,230 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:55,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable317 [2020-09-15 01:27:55,431 INFO L427 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:55,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:55,432 INFO L82 PathProgramCache]: Analyzing trace with hash 32032576, now seen corresponding path program 317 times [2020-09-15 01:27:55,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:55,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538705768] [2020-09-15 01:27:55,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:56,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538705768] [2020-09-15 01:27:56,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216676620] [2020-09-15 01:27:56,293 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 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:56,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-15 01:27:56,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:56,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:27:56,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:56,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:56,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 01:27:56,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676018391] [2020-09-15 01:27:56,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:27:56,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:56,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:27:56,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:27:56,409 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-15 01:27:58,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:58,616 INFO L93 Difference]: Finished difference Result 146 states and 351 transitions. [2020-09-15 01:27:58,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:27:58,618 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-15 01:27:58,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:58,619 INFO L225 Difference]: With dead ends: 146 [2020-09-15 01:27:58,619 INFO L226 Difference]: Without dead ends: 140 [2020-09-15 01:27:58,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=941, Invalid=2719, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 01:27:58,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-15 01:27:58,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 105. [2020-09-15 01:27:58,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:27:58,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-15 01:27:58,621 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-15 01:27:58,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:58,622 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-15 01:27:58,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:27:58,622 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-15 01:27:58,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:27:58,622 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:58,622 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:58,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:58,823 INFO L427 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:58,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:58,823 INFO L82 PathProgramCache]: Analyzing trace with hash -778516060, now seen corresponding path program 318 times [2020-09-15 01:27:58,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:58,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202594735] [2020-09-15 01:27:58,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:59,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202594735] [2020-09-15 01:27:59,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443787596] [2020-09-15 01:27:59,720 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 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:59,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-15 01:27:59,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:59,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:27:59,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:59,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:27:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:59,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:59,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:27:59,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892727092] [2020-09-15 01:27:59,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:27:59,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:59,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:27:59,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:27:59,891 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-15 01:28:02,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:02,520 INFO L93 Difference]: Finished difference Result 145 states and 349 transitions. [2020-09-15 01:28:02,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:28:02,523 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:28:02,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:02,523 INFO L225 Difference]: With dead ends: 145 [2020-09-15 01:28:02,523 INFO L226 Difference]: Without dead ends: 139 [2020-09-15 01:28:02,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-09-15 01:28:02,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-15 01:28:02,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 104. [2020-09-15 01:28:02,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:28:02,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-15 01:28:02,531 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-15 01:28:02,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:02,532 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-15 01:28:02,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:28:02,532 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-15 01:28:02,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:02,532 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:02,532 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:02,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:02,733 INFO L427 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:02,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:02,733 INFO L82 PathProgramCache]: Analyzing trace with hash -726239454, now seen corresponding path program 319 times [2020-09-15 01:28:02,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:02,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897775429] [2020-09-15 01:28:02,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:03,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897775429] [2020-09-15 01:28:03,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861007856] [2020-09-15 01:28:03,601 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 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:03,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:03,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:03,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:03,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 01:28:03,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583086209] [2020-09-15 01:28:03,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:28:03,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:03,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:28:03,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:28:03,716 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-15 01:28:06,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:06,099 INFO L93 Difference]: Finished difference Result 142 states and 343 transitions. [2020-09-15 01:28:06,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:28:06,101 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-15 01:28:06,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:06,101 INFO L225 Difference]: With dead ends: 142 [2020-09-15 01:28:06,101 INFO L226 Difference]: Without dead ends: 136 [2020-09-15 01:28:06,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1006, Invalid=2900, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 01:28:06,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-15 01:28:06,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 105. [2020-09-15 01:28:06,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:28:06,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-15 01:28:06,104 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-15 01:28:06,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:06,104 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-15 01:28:06,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:28:06,104 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-15 01:28:06,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:06,105 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:06,105 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:06,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2020-09-15 01:28:06,305 INFO L427 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:06,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:06,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1150009990, now seen corresponding path program 320 times [2020-09-15 01:28:06,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:06,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386836635] [2020-09-15 01:28:06,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:07,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386836635] [2020-09-15 01:28:07,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579872620] [2020-09-15 01:28:07,124 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 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:07,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:28:07,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:28:07,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:07,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:07,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:28:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:07,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:07,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:28:07,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777022509] [2020-09-15 01:28:07,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:28:07,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:07,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:28:07,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:28:07,277 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-15 01:28:10,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:10,100 INFO L93 Difference]: Finished difference Result 141 states and 341 transitions. [2020-09-15 01:28:10,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 01:28:10,103 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:28:10,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:10,103 INFO L225 Difference]: With dead ends: 141 [2020-09-15 01:28:10,104 INFO L226 Difference]: Without dead ends: 135 [2020-09-15 01:28:10,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1097, Invalid=3193, Unknown=0, NotChecked=0, Total=4290 [2020-09-15 01:28:10,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-15 01:28:10,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2020-09-15 01:28:10,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:28:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-15 01:28:10,106 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-15 01:28:10,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:10,106 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-15 01:28:10,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:28:10,106 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-15 01:28:10,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:10,107 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:10,107 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:10,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2020-09-15 01:28:10,308 INFO L427 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:10,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:10,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1838331780, now seen corresponding path program 321 times [2020-09-15 01:28:10,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:10,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231197950] [2020-09-15 01:28:10,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:11,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231197950] [2020-09-15 01:28:11,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673031095] [2020-09-15 01:28:11,098 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 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:11,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-15 01:28:11,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:28:11,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:11,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:11,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:11,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 01:28:11,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72224827] [2020-09-15 01:28:11,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:28:11,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:11,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:28:11,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:28:11,219 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-15 01:28:13,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:13,698 INFO L93 Difference]: Finished difference Result 138 states and 335 transitions. [2020-09-15 01:28:13,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-15 01:28:13,700 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-15 01:28:13,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:13,701 INFO L225 Difference]: With dead ends: 138 [2020-09-15 01:28:13,701 INFO L226 Difference]: Without dead ends: 132 [2020-09-15 01:28:13,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1087, Invalid=3073, Unknown=0, NotChecked=0, Total=4160 [2020-09-15 01:28:13,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-15 01:28:13,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 105. [2020-09-15 01:28:13,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:28:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-15 01:28:13,703 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-15 01:28:13,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:13,703 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-15 01:28:13,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:28:13,703 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-15 01:28:13,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:13,703 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:13,703 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:13,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2020-09-15 01:28:13,904 INFO L427 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:13,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:13,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1471443992, now seen corresponding path program 322 times [2020-09-15 01:28:13,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:13,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968005224] [2020-09-15 01:28:13,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:14,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968005224] [2020-09-15 01:28:14,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637495780] [2020-09-15 01:28:14,761 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 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:14,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:28:14,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:28:14,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:14,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:14,895 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:28:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:14,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:14,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:28:14,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772085059] [2020-09-15 01:28:14,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:28:14,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:14,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:28:14,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:28:14,930 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-15 01:28:18,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:18,002 INFO L93 Difference]: Finished difference Result 137 states and 333 transitions. [2020-09-15 01:28:18,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 01:28:18,004 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:28:18,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:18,005 INFO L225 Difference]: With dead ends: 137 [2020-09-15 01:28:18,005 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 01:28:18,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1185, Invalid=3371, Unknown=0, NotChecked=0, Total=4556 [2020-09-15 01:28:18,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 01:28:18,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 104. [2020-09-15 01:28:18,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:28:18,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-15 01:28:18,012 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-15 01:28:18,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:18,012 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-15 01:28:18,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:28:18,013 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-15 01:28:18,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:18,013 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:18,013 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:18,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2020-09-15 01:28:18,214 INFO L427 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:18,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:18,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1206364262, now seen corresponding path program 323 times [2020-09-15 01:28:18,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:18,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086234756] [2020-09-15 01:28:18,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:19,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086234756] [2020-09-15 01:28:19,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203286477] [2020-09-15 01:28:19,003 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 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:19,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-15 01:28:19,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:28:19,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:19,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:19,129 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:19,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:19,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 01:28:19,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748987804] [2020-09-15 01:28:19,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:28:19,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:19,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:28:19,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:28:19,131 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-15 01:28:21,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:21,846 INFO L93 Difference]: Finished difference Result 134 states and 327 transitions. [2020-09-15 01:28:21,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-15 01:28:21,848 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-15 01:28:21,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:21,849 INFO L225 Difference]: With dead ends: 134 [2020-09-15 01:28:21,849 INFO L226 Difference]: Without dead ends: 128 [2020-09-15 01:28:21,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1184, Invalid=3238, Unknown=0, NotChecked=0, Total=4422 [2020-09-15 01:28:21,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-15 01:28:21,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 105. [2020-09-15 01:28:21,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:28:21,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-15 01:28:21,852 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-15 01:28:21,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:21,852 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-15 01:28:21,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:28:21,852 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-15 01:28:21,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:21,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:21,852 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:22,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:22,053 INFO L427 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:22,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:22,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1831713334, now seen corresponding path program 324 times [2020-09-15 01:28:22,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:22,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035139571] [2020-09-15 01:28:22,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:22,871 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:22,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035139571] [2020-09-15 01:28:22,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136141009] [2020-09-15 01:28:22,872 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 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:22,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-15 01:28:22,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:28:22,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:22,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:23,007 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:28:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:23,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:23,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:28:23,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814455678] [2020-09-15 01:28:23,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:28:23,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:23,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:28:23,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:28:23,045 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-15 01:28:26,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:26,302 INFO L93 Difference]: Finished difference Result 133 states and 325 transitions. [2020-09-15 01:28:26,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-15 01:28:26,304 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:28:26,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:26,305 INFO L225 Difference]: With dead ends: 133 [2020-09-15 01:28:26,305 INFO L226 Difference]: Without dead ends: 127 [2020-09-15 01:28:26,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1289, Invalid=3541, Unknown=0, NotChecked=0, Total=4830 [2020-09-15 01:28:26,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-15 01:28:26,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2020-09-15 01:28:26,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:28:26,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-15 01:28:26,307 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-15 01:28:26,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:26,308 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-15 01:28:26,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:28:26,308 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-15 01:28:26,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:26,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:26,308 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:26,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2020-09-15 01:28:26,509 INFO L427 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:26,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:26,509 INFO L82 PathProgramCache]: Analyzing trace with hash -215520824, now seen corresponding path program 325 times [2020-09-15 01:28:26,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:26,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408657747] [2020-09-15 01:28:26,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:27,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408657747] [2020-09-15 01:28:27,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857882815] [2020-09-15 01:28:27,297 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 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:27,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:27,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:27,430 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:27,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:27,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 01:28:27,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435713789] [2020-09-15 01:28:27,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:28:27,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:27,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:28:27,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:28:27,431 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-15 01:28:30,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:30,316 INFO L93 Difference]: Finished difference Result 130 states and 319 transitions. [2020-09-15 01:28:30,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-15 01:28:30,318 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-15 01:28:30,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:30,319 INFO L225 Difference]: With dead ends: 130 [2020-09-15 01:28:30,319 INFO L226 Difference]: Without dead ends: 124 [2020-09-15 01:28:30,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1297, Invalid=3395, Unknown=0, NotChecked=0, Total=4692 [2020-09-15 01:28:30,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-15 01:28:30,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 105. [2020-09-15 01:28:30,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:28:30,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-15 01:28:30,322 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-15 01:28:30,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:30,322 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-15 01:28:30,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:28:30,322 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-15 01:28:30,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:30,322 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:30,322 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:30,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:30,523 INFO L427 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:30,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:30,524 INFO L82 PathProgramCache]: Analyzing trace with hash 304222252, now seen corresponding path program 326 times [2020-09-15 01:28:30,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:30,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585296940] [2020-09-15 01:28:30,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:30,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:31,356 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:31,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585296940] [2020-09-15 01:28:31,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972858287] [2020-09-15 01:28:31,357 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 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:31,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:28:31,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:28:31,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:31,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:31,493 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:28:31,529 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:31,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:31,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:28:31,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54796146] [2020-09-15 01:28:31,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:28:31,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:31,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:28:31,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:28:31,530 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-15 01:28:35,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:35,112 INFO L93 Difference]: Finished difference Result 129 states and 317 transitions. [2020-09-15 01:28:35,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-15 01:28:35,114 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:28:35,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:35,115 INFO L225 Difference]: With dead ends: 129 [2020-09-15 01:28:35,115 INFO L226 Difference]: Without dead ends: 123 [2020-09-15 01:28:35,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1409, Invalid=3703, Unknown=0, NotChecked=0, Total=5112 [2020-09-15 01:28:35,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-15 01:28:35,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2020-09-15 01:28:35,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:28:35,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-15 01:28:35,118 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-15 01:28:35,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:35,118 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-15 01:28:35,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:28:35,118 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-15 01:28:35,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:35,118 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:35,118 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:35,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2020-09-15 01:28:35,319 INFO L427 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:35,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:35,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1959533482, now seen corresponding path program 327 times [2020-09-15 01:28:35,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:35,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86822586] [2020-09-15 01:28:35,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:35,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:36,129 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:36,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86822586] [2020-09-15 01:28:36,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756605432] [2020-09-15 01:28:36,129 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 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:36,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-15 01:28:36,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:28:36,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:36,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:36,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:36,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 01:28:36,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557547539] [2020-09-15 01:28:36,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:28:36,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:36,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:28:36,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:28:36,260 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-15 01:28:39,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:39,296 INFO L93 Difference]: Finished difference Result 126 states and 311 transitions. [2020-09-15 01:28:39,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-15 01:28:39,298 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-15 01:28:39,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:39,299 INFO L225 Difference]: With dead ends: 126 [2020-09-15 01:28:39,299 INFO L226 Difference]: Without dead ends: 120 [2020-09-15 01:28:39,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1426, Invalid=3544, Unknown=0, NotChecked=0, Total=4970 [2020-09-15 01:28:39,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-15 01:28:39,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 105. [2020-09-15 01:28:39,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:28:39,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-15 01:28:39,301 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-15 01:28:39,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:39,301 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-15 01:28:39,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:28:39,301 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-15 01:28:39,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:39,301 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:39,302 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:39,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:39,502 INFO L427 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:39,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:39,503 INFO L82 PathProgramCache]: Analyzing trace with hash 239405838, now seen corresponding path program 328 times [2020-09-15 01:28:39,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:39,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026593452] [2020-09-15 01:28:39,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:40,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026593452] [2020-09-15 01:28:40,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611913934] [2020-09-15 01:28:40,326 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 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:40,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:28:40,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:28:40,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:40,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:40,466 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:28:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:40,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:40,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:28:40,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337726058] [2020-09-15 01:28:40,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:28:40,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:40,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:28:40,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:28:40,513 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-15 01:28:44,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:44,311 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-09-15 01:28:44,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-15 01:28:44,313 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:28:44,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:44,314 INFO L225 Difference]: With dead ends: 125 [2020-09-15 01:28:44,314 INFO L226 Difference]: Without dead ends: 119 [2020-09-15 01:28:44,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1545, Invalid=3857, Unknown=0, NotChecked=0, Total=5402 [2020-09-15 01:28:44,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-15 01:28:44,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 104. [2020-09-15 01:28:44,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:28:44,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-15 01:28:44,321 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-15 01:28:44,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:44,321 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-15 01:28:44,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:28:44,322 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-15 01:28:44,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:44,322 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:44,322 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:44,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2020-09-15 01:28:44,523 INFO L427 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:44,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:44,523 INFO L82 PathProgramCache]: Analyzing trace with hash 710401548, now seen corresponding path program 329 times [2020-09-15 01:28:44,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:44,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786366157] [2020-09-15 01:28:44,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:45,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786366157] [2020-09-15 01:28:45,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994954455] [2020-09-15 01:28:45,346 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 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:45,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-15 01:28:45,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:28:45,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:45,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:45,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:45,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 01:28:45,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778077933] [2020-09-15 01:28:45,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:28:45,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:45,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:28:45,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:28:45,489 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-15 01:28:48,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:48,806 INFO L93 Difference]: Finished difference Result 122 states and 303 transitions. [2020-09-15 01:28:48,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-09-15 01:28:48,808 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-15 01:28:48,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:48,809 INFO L225 Difference]: With dead ends: 122 [2020-09-15 01:28:48,809 INFO L226 Difference]: Without dead ends: 116 [2020-09-15 01:28:48,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1571, Invalid=3685, Unknown=0, NotChecked=0, Total=5256 [2020-09-15 01:28:48,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-15 01:28:48,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2020-09-15 01:28:48,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:28:48,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-15 01:28:48,812 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-15 01:28:48,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:48,812 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-15 01:28:48,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:28:48,812 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-15 01:28:48,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:48,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:48,812 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:49,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:49,013 INFO L427 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:49,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:49,014 INFO L82 PathProgramCache]: Analyzing trace with hash 726488688, now seen corresponding path program 330 times [2020-09-15 01:28:49,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:49,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266999754] [2020-09-15 01:28:49,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:49,820 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:49,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266999754] [2020-09-15 01:28:49,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199502222] [2020-09-15 01:28:49,821 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 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:49,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-15 01:28:49,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:28:49,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:49,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:49,963 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:28:50,006 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:50,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:50,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:28:50,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115456601] [2020-09-15 01:28:50,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:28:50,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:50,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:28:50,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:28:50,007 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-15 01:28:54,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:54,042 INFO L93 Difference]: Finished difference Result 121 states and 301 transitions. [2020-09-15 01:28:54,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-15 01:28:54,044 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:28:54,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:54,044 INFO L225 Difference]: With dead ends: 121 [2020-09-15 01:28:54,045 INFO L226 Difference]: Without dead ends: 115 [2020-09-15 01:28:54,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1697, Invalid=4003, Unknown=0, NotChecked=0, Total=5700 [2020-09-15 01:28:54,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-15 01:28:54,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2020-09-15 01:28:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:28:54,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-15 01:28:54,047 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-15 01:28:54,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:54,047 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-15 01:28:54,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:28:54,048 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-15 01:28:54,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:54,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:54,048 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:54,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:54,249 INFO L427 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:54,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:54,249 INFO L82 PathProgramCache]: Analyzing trace with hash 726978798, now seen corresponding path program 331 times [2020-09-15 01:28:54,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:54,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65052363] [2020-09-15 01:28:54,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:55,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65052363] [2020-09-15 01:28:55,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120868993] [2020-09-15 01:28:55,096 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 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:55,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:55,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:55,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:55,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 01:28:55,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937966099] [2020-09-15 01:28:55,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:28:55,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:55,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:28:55,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:28:55,225 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-15 01:28:58,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:58,715 INFO L93 Difference]: Finished difference Result 137 states and 341 transitions. [2020-09-15 01:28:58,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-15 01:28:58,718 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-15 01:28:58,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:58,718 INFO L225 Difference]: With dead ends: 137 [2020-09-15 01:28:58,718 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 01:28:58,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1732, Invalid=3818, Unknown=0, NotChecked=0, Total=5550 [2020-09-15 01:28:58,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 01:28:58,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 108. [2020-09-15 01:28:58,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-15 01:28:58,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 281 transitions. [2020-09-15 01:28:58,722 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 281 transitions. Word has length 32 [2020-09-15 01:28:58,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:58,722 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 281 transitions. [2020-09-15 01:28:58,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:28:58,722 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 281 transitions. [2020-09-15 01:28:58,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:58,723 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:58,723 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:58,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2020-09-15 01:28:58,923 INFO L427 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:58,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:58,924 INFO L82 PathProgramCache]: Analyzing trace with hash 726995538, now seen corresponding path program 332 times [2020-09-15 01:28:58,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:58,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534860748] [2020-09-15 01:28:58,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:58,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:59,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534860748] [2020-09-15 01:28:59,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194946423] [2020-09-15 01:28:59,769 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 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:59,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:28:59,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:28:59,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:59,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:59,906 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:28:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:59,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:59,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:28:59,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543573918] [2020-09-15 01:28:59,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:28:59,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:59,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:28:59,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:28:59,952 INFO L87 Difference]: Start difference. First operand 108 states and 281 transitions. Second operand 29 states. [2020-09-15 01:29:04,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:04,047 INFO L93 Difference]: Finished difference Result 118 states and 297 transitions. [2020-09-15 01:29:04,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-15 01:29:04,050 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:29:04,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:04,050 INFO L225 Difference]: With dead ends: 118 [2020-09-15 01:29:04,050 INFO L226 Difference]: Without dead ends: 110 [2020-09-15 01:29:04,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1865, Invalid=4141, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 01:29:04,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-15 01:29:04,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 77. [2020-09-15 01:29:04,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-15 01:29:04,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 188 transitions. [2020-09-15 01:29:04,052 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 188 transitions. Word has length 32 [2020-09-15 01:29:04,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:04,052 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 188 transitions. [2020-09-15 01:29:04,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:29:04,052 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 188 transitions. [2020-09-15 01:29:04,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:29:04,052 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:04,053 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:04,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2020-09-15 01:29:04,253 INFO L427 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:04,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:04,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1262879060, now seen corresponding path program 333 times [2020-09-15 01:29:04,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:04,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571963720] [2020-09-15 01:29:04,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:05,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571963720] [2020-09-15 01:29:05,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440241812] [2020-09-15 01:29:05,112 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 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:05,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-15 01:29:05,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:29:05,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:29:05,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:05,249 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:29:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:05,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:05,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:29:05,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623848953] [2020-09-15 01:29:05,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:29:05,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:05,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:29:05,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:29:05,311 INFO L87 Difference]: Start difference. First operand 77 states and 188 transitions. Second operand 29 states. [2020-09-15 01:29:09,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:09,158 INFO L93 Difference]: Finished difference Result 140 states and 343 transitions. [2020-09-15 01:29:09,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-15 01:29:09,161 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:29:09,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:09,162 INFO L225 Difference]: With dead ends: 140 [2020-09-15 01:29:09,162 INFO L226 Difference]: Without dead ends: 135 [2020-09-15 01:29:09,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1930, Invalid=4076, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 01:29:09,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-15 01:29:09,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2020-09-15 01:29:09,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-15 01:29:09,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 273 transitions. [2020-09-15 01:29:09,165 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 273 transitions. Word has length 32 [2020-09-15 01:29:09,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:09,165 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 273 transitions. [2020-09-15 01:29:09,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:29:09,165 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 273 transitions. [2020-09-15 01:29:09,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:09,166 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:09,166 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:09,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2020-09-15 01:29:09,367 INFO L427 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:09,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:09,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1062041505, now seen corresponding path program 334 times [2020-09-15 01:29:09,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:09,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485616149] [2020-09-15 01:29:09,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:09,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:10,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485616149] [2020-09-15 01:29:10,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201708675] [2020-09-15 01:29:10,273 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 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:10,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:29:10,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:29:10,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:10,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:10,413 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:29:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:10,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:10,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:29:10,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257760656] [2020-09-15 01:29:10,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:29:10,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:10,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:29:10,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:29:10,478 INFO L87 Difference]: Start difference. First operand 106 states and 273 transitions. Second operand 30 states. [2020-09-15 01:29:14,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:14,744 INFO L93 Difference]: Finished difference Result 114 states and 293 transitions. [2020-09-15 01:29:14,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-15 01:29:14,747 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:29:14,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:14,747 INFO L225 Difference]: With dead ends: 114 [2020-09-15 01:29:14,747 INFO L226 Difference]: Without dead ends: 109 [2020-09-15 01:29:14,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1951, Invalid=4211, Unknown=0, NotChecked=0, Total=6162 [2020-09-15 01:29:14,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-15 01:29:14,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 78. [2020-09-15 01:29:14,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-15 01:29:14,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 192 transitions. [2020-09-15 01:29:14,750 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 192 transitions. Word has length 33 [2020-09-15 01:29:14,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:14,750 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 192 transitions. [2020-09-15 01:29:14,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:29:14,750 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 192 transitions. [2020-09-15 01:29:14,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:14,750 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:14,750 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:14,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:14,951 INFO L427 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:14,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:14,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1801619636, now seen corresponding path program 335 times [2020-09-15 01:29:14,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:14,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597527214] [2020-09-15 01:29:14,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:16,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597527214] [2020-09-15 01:29:16,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915047912] [2020-09-15 01:29:16,116 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 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:16,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-15 01:29:16,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:29:16,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:16,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:16,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:16,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:29:16,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039726585] [2020-09-15 01:29:16,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:29:16,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:16,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:29:16,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:29:16,212 INFO L87 Difference]: Start difference. First operand 78 states and 192 transitions. Second operand 29 states. [2020-09-15 01:29:17,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:17,956 INFO L93 Difference]: Finished difference Result 120 states and 279 transitions. [2020-09-15 01:29:17,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:29:17,958 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:29:17,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:17,959 INFO L225 Difference]: With dead ends: 120 [2020-09-15 01:29:17,959 INFO L226 Difference]: Without dead ends: 114 [2020-09-15 01:29:17,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=913, Invalid=1949, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 01:29:17,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-15 01:29:17,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2020-09-15 01:29:17,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:29:17,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 211 transitions. [2020-09-15 01:29:17,961 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 211 transitions. Word has length 33 [2020-09-15 01:29:17,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:17,961 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 211 transitions. [2020-09-15 01:29:17,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:29:17,962 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 211 transitions. [2020-09-15 01:29:17,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:17,962 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:17,962 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:18,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2020-09-15 01:29:18,164 INFO L427 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:18,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:18,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2064174256, now seen corresponding path program 336 times [2020-09-15 01:29:18,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:18,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883834518] [2020-09-15 01:29:18,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:19,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883834518] [2020-09-15 01:29:19,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31178034] [2020-09-15 01:29:19,359 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 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:19,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-15 01:29:19,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:29:19,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:19,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:19,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:29:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:19,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:19,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:29:19,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088662807] [2020-09-15 01:29:19,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:29:19,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:19,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:29:19,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:29:19,527 INFO L87 Difference]: Start difference. First operand 86 states and 211 transitions. Second operand 30 states. [2020-09-15 01:29:21,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:21,413 INFO L93 Difference]: Finished difference Result 146 states and 331 transitions. [2020-09-15 01:29:21,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:29:21,415 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:29:21,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:21,416 INFO L225 Difference]: With dead ends: 146 [2020-09-15 01:29:21,416 INFO L226 Difference]: Without dead ends: 140 [2020-09-15 01:29:21,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=922, Invalid=2158, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 01:29:21,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-15 01:29:21,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 84. [2020-09-15 01:29:21,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-15 01:29:21,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 207 transitions. [2020-09-15 01:29:21,418 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 207 transitions. Word has length 33 [2020-09-15 01:29:21,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:21,418 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 207 transitions. [2020-09-15 01:29:21,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:29:21,418 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 207 transitions. [2020-09-15 01:29:21,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:21,418 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:21,418 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:21,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:21,619 INFO L427 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:21,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:21,620 INFO L82 PathProgramCache]: Analyzing trace with hash -750635858, now seen corresponding path program 337 times [2020-09-15 01:29:21,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:21,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842201671] [2020-09-15 01:29:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:22,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842201671] [2020-09-15 01:29:22,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683866362] [2020-09-15 01:29:22,797 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 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:22,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:22,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:22,896 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:22,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:22,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:29:22,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85577602] [2020-09-15 01:29:22,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:29:22,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:22,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:29:22,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:29:22,897 INFO L87 Difference]: Start difference. First operand 84 states and 207 transitions. Second operand 29 states. [2020-09-15 01:29:24,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:24,918 INFO L93 Difference]: Finished difference Result 147 states and 335 transitions. [2020-09-15 01:29:24,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:29:24,921 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:29:24,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:24,921 INFO L225 Difference]: With dead ends: 147 [2020-09-15 01:29:24,921 INFO L226 Difference]: Without dead ends: 141 [2020-09-15 01:29:24,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=922, Invalid=2270, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 01:29:24,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-15 01:29:24,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 87. [2020-09-15 01:29:24,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:29:24,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 215 transitions. [2020-09-15 01:29:24,923 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 215 transitions. Word has length 33 [2020-09-15 01:29:24,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:24,923 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 215 transitions. [2020-09-15 01:29:24,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:29:24,923 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 215 transitions. [2020-09-15 01:29:24,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:24,924 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:24,924 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:25,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2020-09-15 01:29:25,124 INFO L427 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:25,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:25,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1720423186, now seen corresponding path program 338 times [2020-09-15 01:29:25,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:25,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934113481] [2020-09-15 01:29:25,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:26,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934113481] [2020-09-15 01:29:26,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130116452] [2020-09-15 01:29:26,331 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 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:26,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:29:26,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:29:26,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:26,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:26,467 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:29:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:26,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:26,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:29:26,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000020421] [2020-09-15 01:29:26,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:29:26,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:26,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:29:26,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:29:26,490 INFO L87 Difference]: Start difference. First operand 87 states and 215 transitions. Second operand 30 states. [2020-09-15 01:29:28,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:28,693 INFO L93 Difference]: Finished difference Result 169 states and 379 transitions. [2020-09-15 01:29:28,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:29:28,696 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:29:28,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:28,696 INFO L225 Difference]: With dead ends: 169 [2020-09-15 01:29:28,697 INFO L226 Difference]: Without dead ends: 163 [2020-09-15 01:29:28,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=964, Invalid=2458, Unknown=0, NotChecked=0, Total=3422 [2020-09-15 01:29:28,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-15 01:29:28,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 86. [2020-09-15 01:29:28,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:29:28,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 213 transitions. [2020-09-15 01:29:28,699 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 213 transitions. Word has length 33 [2020-09-15 01:29:28,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:28,699 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 213 transitions. [2020-09-15 01:29:28,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:29:28,699 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 213 transitions. [2020-09-15 01:29:28,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:28,700 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:28,700 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:28,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:28,900 INFO L427 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:28,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:28,901 INFO L82 PathProgramCache]: Analyzing trace with hash 895148688, now seen corresponding path program 339 times [2020-09-15 01:29:28,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:28,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441534443] [2020-09-15 01:29:28,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:30,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441534443] [2020-09-15 01:29:30,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767696572] [2020-09-15 01:29:30,032 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 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:30,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-15 01:29:30,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:29:30,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:30,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:30,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:30,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:29:30,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424998360] [2020-09-15 01:29:30,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:29:30,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:30,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:29:30,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:29:30,140 INFO L87 Difference]: Start difference. First operand 86 states and 213 transitions. Second operand 29 states. [2020-09-15 01:29:32,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:32,313 INFO L93 Difference]: Finished difference Result 169 states and 381 transitions. [2020-09-15 01:29:32,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:29:32,316 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:29:32,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:32,316 INFO L225 Difference]: With dead ends: 169 [2020-09-15 01:29:32,316 INFO L226 Difference]: Without dead ends: 163 [2020-09-15 01:29:32,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=978, Invalid=2562, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 01:29:32,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-15 01:29:32,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 89. [2020-09-15 01:29:32,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-15 01:29:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 221 transitions. [2020-09-15 01:29:32,319 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 221 transitions. Word has length 33 [2020-09-15 01:29:32,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:32,319 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 221 transitions. [2020-09-15 01:29:32,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:29:32,319 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 221 transitions. [2020-09-15 01:29:32,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:32,319 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:32,320 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:32,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:32,520 INFO L427 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:32,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:32,521 INFO L82 PathProgramCache]: Analyzing trace with hash -143619596, now seen corresponding path program 340 times [2020-09-15 01:29:32,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:32,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065190648] [2020-09-15 01:29:32,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:33,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065190648] [2020-09-15 01:29:33,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595176924] [2020-09-15 01:29:33,668 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 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:33,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:29:33,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:29:33,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:33,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:33,810 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:29:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:33,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:33,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:29:33,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275127892] [2020-09-15 01:29:33,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:29:33,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:33,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:29:33,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:29:33,837 INFO L87 Difference]: Start difference. First operand 89 states and 221 transitions. Second operand 30 states. [2020-09-15 01:29:36,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:36,198 INFO L93 Difference]: Finished difference Result 166 states and 375 transitions. [2020-09-15 01:29:36,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:29:36,200 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:29:36,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:36,201 INFO L225 Difference]: With dead ends: 166 [2020-09-15 01:29:36,201 INFO L226 Difference]: Without dead ends: 160 [2020-09-15 01:29:36,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=979, Invalid=2681, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 01:29:36,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-15 01:29:36,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 88. [2020-09-15 01:29:36,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-15 01:29:36,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 219 transitions. [2020-09-15 01:29:36,203 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 219 transitions. Word has length 33 [2020-09-15 01:29:36,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:36,204 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 219 transitions. [2020-09-15 01:29:36,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:29:36,204 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 219 transitions. [2020-09-15 01:29:36,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:36,204 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:36,204 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:36,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable341 [2020-09-15 01:29:36,405 INFO L427 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:36,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:36,406 INFO L82 PathProgramCache]: Analyzing trace with hash 271163634, now seen corresponding path program 341 times [2020-09-15 01:29:36,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:36,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894876518] [2020-09-15 01:29:36,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:37,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894876518] [2020-09-15 01:29:37,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768084362] [2020-09-15 01:29:37,526 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 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:37,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-15 01:29:37,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:29:37,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:37,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:37,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:37,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:29:37,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152692666] [2020-09-15 01:29:37,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:29:37,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:37,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:29:37,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:29:37,646 INFO L87 Difference]: Start difference. First operand 88 states and 219 transitions. Second operand 29 states. [2020-09-15 01:29:39,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:39,976 INFO L93 Difference]: Finished difference Result 167 states and 379 transitions. [2020-09-15 01:29:39,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:29:39,979 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:29:39,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:39,979 INFO L225 Difference]: With dead ends: 167 [2020-09-15 01:29:39,979 INFO L226 Difference]: Without dead ends: 161 [2020-09-15 01:29:39,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1008, Invalid=2774, Unknown=0, NotChecked=0, Total=3782 [2020-09-15 01:29:39,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-15 01:29:39,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 91. [2020-09-15 01:29:39,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-15 01:29:39,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 227 transitions. [2020-09-15 01:29:39,982 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 227 transitions. Word has length 33 [2020-09-15 01:29:39,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:39,982 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 227 transitions. [2020-09-15 01:29:39,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:29:39,982 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 227 transitions. [2020-09-15 01:29:39,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:39,982 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:39,982 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:40,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2020-09-15 01:29:40,183 INFO L427 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:40,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:40,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1450585770, now seen corresponding path program 342 times [2020-09-15 01:29:40,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:40,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897233018] [2020-09-15 01:29:40,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:41,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897233018] [2020-09-15 01:29:41,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049616867] [2020-09-15 01:29:41,295 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 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:41,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-15 01:29:41,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:29:41,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:41,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:41,446 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:29:41,483 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:41,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:41,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:29:41,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422146160] [2020-09-15 01:29:41,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:29:41,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:41,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:29:41,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:29:41,484 INFO L87 Difference]: Start difference. First operand 91 states and 227 transitions. Second operand 30 states. [2020-09-15 01:29:44,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:44,150 INFO L93 Difference]: Finished difference Result 164 states and 373 transitions. [2020-09-15 01:29:44,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:29:44,153 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:29:44,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:44,153 INFO L225 Difference]: With dead ends: 164 [2020-09-15 01:29:44,154 INFO L226 Difference]: Without dead ends: 158 [2020-09-15 01:29:44,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1010, Invalid=2896, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 01:29:44,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-09-15 01:29:44,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2020-09-15 01:29:44,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-15 01:29:44,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 225 transitions. [2020-09-15 01:29:44,156 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 225 transitions. Word has length 33 [2020-09-15 01:29:44,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:44,156 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 225 transitions. [2020-09-15 01:29:44,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:29:44,156 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 225 transitions. [2020-09-15 01:29:44,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:44,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:44,156 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:44,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2020-09-15 01:29:44,357 INFO L427 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:44,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:44,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1660456916, now seen corresponding path program 343 times [2020-09-15 01:29:44,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:44,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264578977] [2020-09-15 01:29:44,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:45,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264578977] [2020-09-15 01:29:45,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708644739] [2020-09-15 01:29:45,421 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 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:45,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:45,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:45,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:45,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:29:45,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125644241] [2020-09-15 01:29:45,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:29:45,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:45,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:29:45,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:29:45,534 INFO L87 Difference]: Start difference. First operand 90 states and 225 transitions. Second operand 29 states. [2020-09-15 01:29:48,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:48,042 INFO L93 Difference]: Finished difference Result 165 states and 377 transitions. [2020-09-15 01:29:48,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:29:48,045 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:29:48,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:48,045 INFO L225 Difference]: With dead ends: 165 [2020-09-15 01:29:48,045 INFO L226 Difference]: Without dead ends: 159 [2020-09-15 01:29:48,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1054, Invalid=2978, Unknown=0, NotChecked=0, Total=4032 [2020-09-15 01:29:48,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-15 01:29:48,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 93. [2020-09-15 01:29:48,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:29:48,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-09-15 01:29:48,048 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 33 [2020-09-15 01:29:48,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:48,048 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-09-15 01:29:48,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:29:48,048 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-09-15 01:29:48,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:48,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:48,048 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:48,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2020-09-15 01:29:48,249 INFO L427 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:48,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:48,250 INFO L82 PathProgramCache]: Analyzing trace with hash 112298296, now seen corresponding path program 344 times [2020-09-15 01:29:48,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:48,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007988286] [2020-09-15 01:29:48,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:49,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007988286] [2020-09-15 01:29:49,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889351423] [2020-09-15 01:29:49,362 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 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:49,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:29:49,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:29:49,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:49,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:49,508 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:29:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:49,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:49,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:29:49,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577401541] [2020-09-15 01:29:49,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:29:49,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:49,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:29:49,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:29:49,541 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 30 states. [2020-09-15 01:29:52,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:52,398 INFO L93 Difference]: Finished difference Result 162 states and 371 transitions. [2020-09-15 01:29:52,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:29:52,401 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:29:52,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:52,402 INFO L225 Difference]: With dead ends: 162 [2020-09-15 01:29:52,402 INFO L226 Difference]: Without dead ends: 156 [2020-09-15 01:29:52,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1057, Invalid=3103, Unknown=0, NotChecked=0, Total=4160 [2020-09-15 01:29:52,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-09-15 01:29:52,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 92. [2020-09-15 01:29:52,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:29:52,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 231 transitions. [2020-09-15 01:29:52,405 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 231 transitions. Word has length 33 [2020-09-15 01:29:52,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:52,405 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 231 transitions. [2020-09-15 01:29:52,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:29:52,406 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 231 transitions. [2020-09-15 01:29:52,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:52,406 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:52,406 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:52,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2020-09-15 01:29:52,607 INFO L427 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:52,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:52,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1189490890, now seen corresponding path program 345 times [2020-09-15 01:29:52,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:52,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531151223] [2020-09-15 01:29:52,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:52,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:53,658 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:53,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531151223] [2020-09-15 01:29:53,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990847948] [2020-09-15 01:29:53,658 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 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:53,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-15 01:29:53,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:29:53,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:53,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:53,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:53,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:29:53,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10483344] [2020-09-15 01:29:53,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:29:53,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:53,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:29:53,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:29:53,782 INFO L87 Difference]: Start difference. First operand 92 states and 231 transitions. Second operand 29 states. [2020-09-15 01:29:56,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:56,501 INFO L93 Difference]: Finished difference Result 163 states and 375 transitions. [2020-09-15 01:29:56,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-15 01:29:56,504 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:29:56,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:56,504 INFO L225 Difference]: With dead ends: 163 [2020-09-15 01:29:56,505 INFO L226 Difference]: Without dead ends: 157 [2020-09-15 01:29:56,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1116, Invalid=3174, Unknown=0, NotChecked=0, Total=4290 [2020-09-15 01:29:56,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-15 01:29:56,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 95. [2020-09-15 01:29:56,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-15 01:29:56,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 239 transitions. [2020-09-15 01:29:56,508 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 239 transitions. Word has length 33 [2020-09-15 01:29:56,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:56,508 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 239 transitions. [2020-09-15 01:29:56,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:29:56,508 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 239 transitions. [2020-09-15 01:29:56,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:56,508 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:56,508 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:56,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2020-09-15 01:29:56,709 INFO L427 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:56,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:56,710 INFO L82 PathProgramCache]: Analyzing trace with hash -2000039526, now seen corresponding path program 346 times [2020-09-15 01:29:56,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:56,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722007401] [2020-09-15 01:29:56,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:57,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722007401] [2020-09-15 01:29:57,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051045386] [2020-09-15 01:29:57,815 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 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:57,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:29:57,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:29:57,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:57,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:57,959 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:29:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:57,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:57,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:29:57,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764915030] [2020-09-15 01:29:57,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:29:57,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:57,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:29:57,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:29:57,992 INFO L87 Difference]: Start difference. First operand 95 states and 239 transitions. Second operand 30 states. [2020-09-15 01:30:01,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:30:01,078 INFO L93 Difference]: Finished difference Result 160 states and 369 transitions. [2020-09-15 01:30:01,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 01:30:01,081 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:30:01,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:30:01,081 INFO L225 Difference]: With dead ends: 160 [2020-09-15 01:30:01,081 INFO L226 Difference]: Without dead ends: 154 [2020-09-15 01:30:01,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1120, Invalid=3302, Unknown=0, NotChecked=0, Total=4422 [2020-09-15 01:30:01,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-15 01:30:01,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 94. [2020-09-15 01:30:01,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-15 01:30:01,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 237 transitions. [2020-09-15 01:30:01,083 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 237 transitions. Word has length 33 [2020-09-15 01:30:01,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:30:01,083 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 237 transitions. [2020-09-15 01:30:01,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:30:01,084 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 237 transitions. [2020-09-15 01:30:01,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:30:01,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:30:01,084 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:30:01,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:01,285 INFO L427 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:30:01,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:30:01,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1947762920, now seen corresponding path program 347 times [2020-09-15 01:30:01,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:30:01,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688509009] [2020-09-15 01:30:01,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:30:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:02,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688509009] [2020-09-15 01:30:02,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349636174] [2020-09-15 01:30:02,393 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 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:02,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-15 01:30:02,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:30:02,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:30:02,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:30:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:02,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:30:02,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:30:02,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521076502] [2020-09-15 01:30:02,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:30:02,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:30:02,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:30:02,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:30:02,518 INFO L87 Difference]: Start difference. First operand 94 states and 237 transitions. Second operand 29 states. [2020-09-15 01:30:05,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:30:05,432 INFO L93 Difference]: Finished difference Result 161 states and 373 transitions. [2020-09-15 01:30:05,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-15 01:30:05,434 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:30:05,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:30:05,435 INFO L225 Difference]: With dead ends: 161 [2020-09-15 01:30:05,435 INFO L226 Difference]: Without dead ends: 155 [2020-09-15 01:30:05,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2020-09-15 01:30:05,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-15 01:30:05,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 97. [2020-09-15 01:30:05,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-15 01:30:05,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 245 transitions. [2020-09-15 01:30:05,438 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 245 transitions. Word has length 33 [2020-09-15 01:30:05,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:30:05,439 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 245 transitions. [2020-09-15 01:30:05,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:30:05,439 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 245 transitions. [2020-09-15 01:30:05,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:30:05,439 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:30:05,439 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:30:05,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2020-09-15 01:30:05,640 INFO L427 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:30:05,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:30:05,641 INFO L82 PathProgramCache]: Analyzing trace with hash -71513476, now seen corresponding path program 348 times [2020-09-15 01:30:05,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:30:05,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026846785] [2020-09-15 01:30:05,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:30:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:06,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026846785] [2020-09-15 01:30:06,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045335008] [2020-09-15 01:30:06,702 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 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:06,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-15 01:30:06,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:30:06,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:30:06,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:30:06,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:30:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:06,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:30:06,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:30:06,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046410963] [2020-09-15 01:30:06,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:30:06,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:30:06,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:30:06,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:30:06,894 INFO L87 Difference]: Start difference. First operand 97 states and 245 transitions. Second operand 30 states. [2020-09-15 01:30:10,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:30:10,246 INFO L93 Difference]: Finished difference Result 158 states and 367 transitions. [2020-09-15 01:30:10,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 01:30:10,249 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:30:10,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:30:10,250 INFO L225 Difference]: With dead ends: 158 [2020-09-15 01:30:10,250 INFO L226 Difference]: Without dead ends: 152 [2020-09-15 01:30:10,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1199, Invalid=3493, Unknown=0, NotChecked=0, Total=4692 [2020-09-15 01:30:10,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-15 01:30:10,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 96. [2020-09-15 01:30:10,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-15 01:30:10,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 243 transitions. [2020-09-15 01:30:10,252 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 243 transitions. Word has length 33 [2020-09-15 01:30:10,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:30:10,253 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 243 transitions. [2020-09-15 01:30:10,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:30:10,253 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 243 transitions. [2020-09-15 01:30:10,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:30:10,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:30:10,253 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:30:10,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2020-09-15 01:30:10,454 INFO L427 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:30:10,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:30:10,454 INFO L82 PathProgramCache]: Analyzing trace with hash 616808314, now seen corresponding path program 349 times [2020-09-15 01:30:10,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:30:10,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068751301] [2020-09-15 01:30:10,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:30:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:11,510 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:11,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068751301] [2020-09-15 01:30:11,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205700697] [2020-09-15 01:30:11,511 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 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:11,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:30:11,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:30:11,632 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:11,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:30:11,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:30:11,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673712101] [2020-09-15 01:30:11,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:30:11,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:30:11,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:30:11,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:30:11,633 INFO L87 Difference]: Start difference. First operand 96 states and 243 transitions. Second operand 29 states. [2020-09-15 01:30:14,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:30:14,825 INFO L93 Difference]: Finished difference Result 159 states and 371 transitions. [2020-09-15 01:30:14,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-15 01:30:14,828 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:30:14,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:30:14,828 INFO L225 Difference]: With dead ends: 159 [2020-09-15 01:30:14,829 INFO L226 Difference]: Without dead ends: 153 [2020-09-15 01:30:14,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1288, Invalid=3542, Unknown=0, NotChecked=0, Total=4830 [2020-09-15 01:30:14,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-15 01:30:14,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 99. [2020-09-15 01:30:14,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:30:14,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 251 transitions. [2020-09-15 01:30:14,831 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 251 transitions. Word has length 33 [2020-09-15 01:30:14,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:30:14,831 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 251 transitions. [2020-09-15 01:30:14,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:30:14,832 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 251 transitions. [2020-09-15 01:30:14,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:30:14,832 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:30:14,832 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:30:15,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:15,033 INFO L427 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:30:15,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:30:15,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1601999838, now seen corresponding path program 350 times [2020-09-15 01:30:15,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:30:15,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280140460] [2020-09-15 01:30:15,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:30:15,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:16,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280140460] [2020-09-15 01:30:16,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015579676] [2020-09-15 01:30:16,061 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 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:16,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:30:16,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:30:16,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:30:16,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:30:16,202 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:30:16,250 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:16,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:30:16,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:30:16,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787351148] [2020-09-15 01:30:16,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:30:16,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:30:16,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:30:16,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:30:16,251 INFO L87 Difference]: Start difference. First operand 99 states and 251 transitions. Second operand 30 states. [2020-09-15 01:30:19,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:30:19,877 INFO L93 Difference]: Finished difference Result 156 states and 365 transitions. [2020-09-15 01:30:19,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-15 01:30:19,880 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:30:19,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:30:19,880 INFO L225 Difference]: With dead ends: 156 [2020-09-15 01:30:19,880 INFO L226 Difference]: Without dead ends: 150 [2020-09-15 01:30:19,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1294, Invalid=3676, Unknown=0, NotChecked=0, Total=4970 [2020-09-15 01:30:19,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-15 01:30:19,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 98. [2020-09-15 01:30:19,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:30:19,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 249 transitions. [2020-09-15 01:30:19,883 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 249 transitions. Word has length 33 [2020-09-15 01:30:19,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:30:19,883 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 249 transitions. [2020-09-15 01:30:19,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:30:19,884 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 249 transitions. [2020-09-15 01:30:19,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:30:19,884 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:30:19,884 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:30:20,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:20,089 INFO L427 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:30:20,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:30:20,090 INFO L82 PathProgramCache]: Analyzing trace with hash -15159204, now seen corresponding path program 351 times [2020-09-15 01:30:20,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:30:20,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717447066] [2020-09-15 01:30:20,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:30:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:21,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717447066] [2020-09-15 01:30:21,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698948768] [2020-09-15 01:30:21,087 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 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:21,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-15 01:30:21,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:30:21,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:30:21,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:30:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:21,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:30:21,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:30:21,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654938214] [2020-09-15 01:30:21,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:30:21,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:30:21,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:30:21,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:30:21,232 INFO L87 Difference]: Start difference. First operand 98 states and 249 transitions. Second operand 29 states. [2020-09-15 01:30:24,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:30:24,595 INFO L93 Difference]: Finished difference Result 157 states and 369 transitions. [2020-09-15 01:30:24,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-15 01:30:24,597 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:30:24,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:30:24,598 INFO L225 Difference]: With dead ends: 157 [2020-09-15 01:30:24,598 INFO L226 Difference]: Without dead ends: 151 [2020-09-15 01:30:24,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1398, Invalid=3714, Unknown=0, NotChecked=0, Total=5112 [2020-09-15 01:30:24,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-15 01:30:24,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 101. [2020-09-15 01:30:24,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-15 01:30:24,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 257 transitions. [2020-09-15 01:30:24,600 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 257 transitions. Word has length 33 [2020-09-15 01:30:24,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:30:24,600 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 257 transitions. [2020-09-15 01:30:24,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:30:24,600 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 257 transitions. [2020-09-15 01:30:24,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:30:24,601 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:30:24,601 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:30:24,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:24,802 INFO L427 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:30:24,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:30:24,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1241730496, now seen corresponding path program 352 times [2020-09-15 01:30:24,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:30:24,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160900970] [2020-09-15 01:30:24,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:30:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:25,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160900970] [2020-09-15 01:30:25,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078551956] [2020-09-15 01:30:25,835 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 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:25,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:30:25,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:30:25,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:30:25,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:30:25,986 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:30:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:26,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:30:26,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:30:26,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738306093] [2020-09-15 01:30:26,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:30:26,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:30:26,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:30:26,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:30:26,031 INFO L87 Difference]: Start difference. First operand 101 states and 257 transitions. Second operand 30 states. [2020-09-15 01:30:29,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:30:29,961 INFO L93 Difference]: Finished difference Result 154 states and 363 transitions. [2020-09-15 01:30:29,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-15 01:30:29,964 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:30:29,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:30:29,965 INFO L225 Difference]: With dead ends: 154 [2020-09-15 01:30:29,965 INFO L226 Difference]: Without dead ends: 148 [2020-09-15 01:30:29,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1405, Invalid=3851, Unknown=0, NotChecked=0, Total=5256 [2020-09-15 01:30:29,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-15 01:30:29,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 100. [2020-09-15 01:30:29,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-15 01:30:29,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 255 transitions. [2020-09-15 01:30:29,968 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 255 transitions. Word has length 33 [2020-09-15 01:30:29,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:30:29,968 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 255 transitions. [2020-09-15 01:30:29,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:30:29,968 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 255 transitions. [2020-09-15 01:30:29,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:30:29,968 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:30:29,969 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:30:30,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2020-09-15 01:30:30,169 INFO L427 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:30:30,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:30:30,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1437044290, now seen corresponding path program 353 times [2020-09-15 01:30:30,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:30:30,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345215337] [2020-09-15 01:30:30,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:30:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:31,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345215337] [2020-09-15 01:30:31,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277830850] [2020-09-15 01:30:31,158 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 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:31,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-15 01:30:31,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:30:31,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:30:31,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:30:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:31,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:30:31,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:30:31,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306621966] [2020-09-15 01:30:31,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:30:31,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:30:31,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:30:31,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:30:31,297 INFO L87 Difference]: Start difference. First operand 100 states and 255 transitions. Second operand 29 states. [2020-09-15 01:30:34,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:30:34,827 INFO L93 Difference]: Finished difference Result 155 states and 367 transitions. [2020-09-15 01:30:34,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-09-15 01:30:34,829 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:30:34,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:30:34,830 INFO L225 Difference]: With dead ends: 155 [2020-09-15 01:30:34,830 INFO L226 Difference]: Without dead ends: 149 [2020-09-15 01:30:34,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1524, Invalid=3878, Unknown=0, NotChecked=0, Total=5402 [2020-09-15 01:30:34,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-15 01:30:34,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 103. [2020-09-15 01:30:34,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-15 01:30:34,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 263 transitions. [2020-09-15 01:30:34,833 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 263 transitions. Word has length 33 [2020-09-15 01:30:34,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:30:34,833 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 263 transitions. [2020-09-15 01:30:34,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:30:34,833 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 263 transitions. [2020-09-15 01:30:34,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:30:34,833 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:30:34,833 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:30:35,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2020-09-15 01:30:35,034 INFO L427 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:30:35,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:30:35,035 INFO L82 PathProgramCache]: Analyzing trace with hash -917301214, now seen corresponding path program 354 times [2020-09-15 01:30:35,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:30:35,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072175652] [2020-09-15 01:30:35,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:30:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:36,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072175652] [2020-09-15 01:30:36,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742957307] [2020-09-15 01:30:36,108 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 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:36,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-15 01:30:36,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:30:36,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:30:36,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:30:36,262 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:30:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:36,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:30:36,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:30:36,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444880319] [2020-09-15 01:30:36,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:30:36,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:30:36,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:30:36,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:30:36,316 INFO L87 Difference]: Start difference. First operand 103 states and 263 transitions. Second operand 30 states. [2020-09-15 01:30:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:30:40,532 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-09-15 01:30:40,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-15 01:30:40,535 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:30:40,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:30:40,536 INFO L225 Difference]: With dead ends: 152 [2020-09-15 01:30:40,536 INFO L226 Difference]: Without dead ends: 146 [2020-09-15 01:30:40,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1532, Invalid=4018, Unknown=0, NotChecked=0, Total=5550 [2020-09-15 01:30:40,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-15 01:30:40,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 102. [2020-09-15 01:30:40,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-15 01:30:40,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 261 transitions. [2020-09-15 01:30:40,539 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 261 transitions. Word has length 33 [2020-09-15 01:30:40,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:30:40,539 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 261 transitions. [2020-09-15 01:30:40,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:30:40,539 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 261 transitions. [2020-09-15 01:30:40,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:30:40,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:30:40,539 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:30:40,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:40,740 INFO L427 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:30:40,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:30:40,741 INFO L82 PathProgramCache]: Analyzing trace with hash 738010016, now seen corresponding path program 355 times [2020-09-15 01:30:40,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:30:40,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372693282] [2020-09-15 01:30:40,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:30:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:41,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372693282] [2020-09-15 01:30:41,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450565659] [2020-09-15 01:30:41,748 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 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:41,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:30:41,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:30:41,881 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:41,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:30:41,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:30:41,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135808533] [2020-09-15 01:30:41,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:30:41,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:30:41,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:30:41,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:30:41,882 INFO L87 Difference]: Start difference. First operand 102 states and 261 transitions. Second operand 29 states. [2020-09-15 01:30:45,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:30:45,597 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-09-15 01:30:45,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-15 01:30:45,600 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:30:45,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:30:45,601 INFO L225 Difference]: With dead ends: 153 [2020-09-15 01:30:45,601 INFO L226 Difference]: Without dead ends: 147 [2020-09-15 01:30:45,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1666, Invalid=4034, Unknown=0, NotChecked=0, Total=5700 [2020-09-15 01:30:45,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-15 01:30:45,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 105. [2020-09-15 01:30:45,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:30:45,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-15 01:30:45,604 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 33 [2020-09-15 01:30:45,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:30:45,604 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-15 01:30:45,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:30:45,604 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-15 01:30:45,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:30:45,605 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:30:45,605 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:30:45,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2020-09-15 01:30:45,806 INFO L427 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:30:45,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:30:45,806 INFO L82 PathProgramCache]: Analyzing trace with hash -982117628, now seen corresponding path program 356 times [2020-09-15 01:30:45,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:30:45,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285303869] [2020-09-15 01:30:45,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:30:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:46,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285303869] [2020-09-15 01:30:46,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935545894] [2020-09-15 01:30:46,876 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 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:46,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:30:46,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:30:46,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:30:46,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:30:47,016 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:30:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:47,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:30:47,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:30:47,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914536756] [2020-09-15 01:30:47,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:30:47,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:30:47,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:30:47,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:30:47,066 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 30 states. [2020-09-15 01:30:51,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:30:51,513 INFO L93 Difference]: Finished difference Result 150 states and 359 transitions. [2020-09-15 01:30:51,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-15 01:30:51,516 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:30:51,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:30:51,517 INFO L225 Difference]: With dead ends: 150 [2020-09-15 01:30:51,517 INFO L226 Difference]: Without dead ends: 144 [2020-09-15 01:30:51,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1675, Invalid=4177, Unknown=0, NotChecked=0, Total=5852 [2020-09-15 01:30:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-15 01:30:51,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 104. [2020-09-15 01:30:51,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:30:51,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-15 01:30:51,519 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 33 [2020-09-15 01:30:51,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:30:51,520 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-15 01:30:51,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:30:51,520 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-15 01:30:51,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:30:51,520 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:30:51,520 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:30:51,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:51,721 INFO L427 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:30:51,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:30:51,721 INFO L82 PathProgramCache]: Analyzing trace with hash -511121918, now seen corresponding path program 357 times [2020-09-15 01:30:51,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:30:51,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618426821] [2020-09-15 01:30:51,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:30:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:52,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618426821] [2020-09-15 01:30:52,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123610625] [2020-09-15 01:30:52,754 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 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:52,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-15 01:30:52,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:30:52,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:30:52,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:30:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:52,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:30:52,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:30:52,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781028868] [2020-09-15 01:30:52,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:30:52,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:30:52,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:30:52,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:30:52,913 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 29 states. [2020-09-15 01:30:56,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:30:56,949 INFO L93 Difference]: Finished difference Result 151 states and 363 transitions. [2020-09-15 01:30:56,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-09-15 01:30:56,952 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:30:56,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:30:56,953 INFO L225 Difference]: With dead ends: 151 [2020-09-15 01:30:56,953 INFO L226 Difference]: Without dead ends: 145 [2020-09-15 01:30:56,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1824, Invalid=4182, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 01:30:56,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-15 01:30:56,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 107. [2020-09-15 01:30:56,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-15 01:30:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 275 transitions. [2020-09-15 01:30:56,956 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 275 transitions. Word has length 33 [2020-09-15 01:30:56,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:30:56,956 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 275 transitions. [2020-09-15 01:30:56,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:30:56,956 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 275 transitions. [2020-09-15 01:30:56,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:30:56,957 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:30:56,957 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:30:57,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2020-09-15 01:30:57,158 INFO L427 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:30:57,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:30:57,158 INFO L82 PathProgramCache]: Analyzing trace with hash -495034778, now seen corresponding path program 358 times [2020-09-15 01:30:57,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:30:57,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995142092] [2020-09-15 01:30:57,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:30:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:58,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995142092] [2020-09-15 01:30:58,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513342538] [2020-09-15 01:30:58,114 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 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:58,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:30:58,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:30:58,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:30:58,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:30:58,253 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:30:58,300 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:58,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:30:58,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:30:58,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750722477] [2020-09-15 01:30:58,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:30:58,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:30:58,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:30:58,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:30:58,302 INFO L87 Difference]: Start difference. First operand 107 states and 275 transitions. Second operand 30 states. [2020-09-15 01:31:02,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:31:02,941 INFO L93 Difference]: Finished difference Result 148 states and 357 transitions. [2020-09-15 01:31:02,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-15 01:31:02,944 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:31:02,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:31:02,945 INFO L225 Difference]: With dead ends: 148 [2020-09-15 01:31:02,945 INFO L226 Difference]: Without dead ends: 142 [2020-09-15 01:31:02,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1834, Invalid=4328, Unknown=0, NotChecked=0, Total=6162 [2020-09-15 01:31:02,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-15 01:31:02,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 106. [2020-09-15 01:31:02,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-15 01:31:02,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 273 transitions. [2020-09-15 01:31:02,948 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 273 transitions. Word has length 33 [2020-09-15 01:31:02,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:31:02,949 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 273 transitions. [2020-09-15 01:31:02,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:31:02,949 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 273 transitions. [2020-09-15 01:31:02,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:31:02,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:31:02,949 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:31:03,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:03,150 INFO L427 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:31:03,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:31:03,150 INFO L82 PathProgramCache]: Analyzing trace with hash -494544668, now seen corresponding path program 359 times [2020-09-15 01:31:03,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:31:03,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527383955] [2020-09-15 01:31:03,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:31:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:31:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:04,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527383955] [2020-09-15 01:31:04,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315720083] [2020-09-15 01:31:04,172 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 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:04,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-15 01:31:04,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:31:04,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:31:04,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:31:04,324 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:04,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:31:04,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:31:04,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058098465] [2020-09-15 01:31:04,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:31:04,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:31:04,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:31:04,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:31:04,325 INFO L87 Difference]: Start difference. First operand 106 states and 273 transitions. Second operand 29 states. [2020-09-15 01:31:08,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:31:08,510 INFO L93 Difference]: Finished difference Result 168 states and 407 transitions. [2020-09-15 01:31:08,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-09-15 01:31:08,513 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:31:08,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:31:08,514 INFO L225 Difference]: With dead ends: 168 [2020-09-15 01:31:08,514 INFO L226 Difference]: Without dead ends: 162 [2020-09-15 01:31:08,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1998, Invalid=4322, Unknown=0, NotChecked=0, Total=6320 [2020-09-15 01:31:08,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-15 01:31:08,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 112. [2020-09-15 01:31:08,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-15 01:31:08,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 293 transitions. [2020-09-15 01:31:08,517 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 293 transitions. Word has length 33 [2020-09-15 01:31:08,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:31:08,517 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 293 transitions. [2020-09-15 01:31:08,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:31:08,517 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 293 transitions. [2020-09-15 01:31:08,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:31:08,518 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:31:08,518 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:31:08,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:08,719 INFO L427 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:31:08,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:31:08,719 INFO L82 PathProgramCache]: Analyzing trace with hash -494527928, now seen corresponding path program 360 times [2020-09-15 01:31:08,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:31:08,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062680831] [2020-09-15 01:31:08,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:31:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:31:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:09,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062680831] [2020-09-15 01:31:09,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554519372] [2020-09-15 01:31:09,780 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 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:09,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-15 01:31:09,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:31:09,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:31:09,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:31:09,945 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:31:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:09,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:31:09,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:31:09,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688635744] [2020-09-15 01:31:10,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:31:10,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:31:10,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:31:10,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:31:10,000 INFO L87 Difference]: Start difference. First operand 112 states and 293 transitions. Second operand 30 states. [2020-09-15 01:31:14,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:31:14,770 INFO L93 Difference]: Finished difference Result 149 states and 363 transitions. [2020-09-15 01:31:14,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-15 01:31:14,773 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:31:14,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:31:14,774 INFO L225 Difference]: With dead ends: 149 [2020-09-15 01:31:14,774 INFO L226 Difference]: Without dead ends: 141 [2020-09-15 01:31:14,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2009, Invalid=4471, Unknown=0, NotChecked=0, Total=6480 [2020-09-15 01:31:14,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-15 01:31:14,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 109. [2020-09-15 01:31:14,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-15 01:31:14,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 281 transitions. [2020-09-15 01:31:14,777 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 281 transitions. Word has length 33 [2020-09-15 01:31:14,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:31:14,778 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 281 transitions. [2020-09-15 01:31:14,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:31:14,778 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 281 transitions. [2020-09-15 01:31:14,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 01:31:14,778 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:31:14,778 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:31:14,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:14,979 INFO L427 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:31:14,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:31:14,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1551441143, now seen corresponding path program 361 times [2020-09-15 01:31:14,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:31:14,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964959564] [2020-09-15 01:31:14,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:31:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:31:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:16,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964959564] [2020-09-15 01:31:16,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824972774] [2020-09-15 01:31:16,409 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 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:31:16,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 01:31:16,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:31:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:16,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:31:16,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-15 01:31:16,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296031685] [2020-09-15 01:31:16,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:31:16,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:31:16,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:31:16,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:31:16,512 INFO L87 Difference]: Start difference. First operand 109 states and 281 transitions. Second operand 30 states. [2020-09-15 01:31:18,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:31:18,688 INFO L93 Difference]: Finished difference Result 174 states and 411 transitions. [2020-09-15 01:31:18,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:31:18,691 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-09-15 01:31:18,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:31:18,691 INFO L225 Difference]: With dead ends: 174 [2020-09-15 01:31:18,691 INFO L226 Difference]: Without dead ends: 168 [2020-09-15 01:31:18,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=975, Invalid=2217, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 01:31:18,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-15 01:31:18,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 111. [2020-09-15 01:31:18,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-15 01:31:18,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-09-15 01:31:18,694 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-09-15 01:31:18,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:31:18,694 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-09-15 01:31:18,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:31:18,694 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-09-15 01:31:18,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 01:31:18,694 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:31:18,694 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:31:18,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable362 [2020-09-15 01:31:18,895 INFO L427 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:31:18,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:31:18,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1122267739, now seen corresponding path program 362 times [2020-09-15 01:31:18,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:31:18,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432512641] [2020-09-15 01:31:18,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:31:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:31:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:20,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432512641] [2020-09-15 01:31:20,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762569050] [2020-09-15 01:31:20,352 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 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:20,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:31:20,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:31:20,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 01:31:20,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:31:20,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:31:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:20,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:31:20,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-09-15 01:31:20,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128268223] [2020-09-15 01:31:20,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-15 01:31:20,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:31:20,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-15 01:31:20,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:31:20,529 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-09-15 01:31:23,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:31:23,008 INFO L93 Difference]: Finished difference Result 171 states and 405 transitions. [2020-09-15 01:31:23,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:31:23,011 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-15 01:31:23,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:31:23,012 INFO L225 Difference]: With dead ends: 171 [2020-09-15 01:31:23,012 INFO L226 Difference]: Without dead ends: 165 [2020-09-15 01:31:23,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1034, Invalid=2506, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 01:31:23,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-15 01:31:23,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 110. [2020-09-15 01:31:23,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-15 01:31:23,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-09-15 01:31:23,014 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-09-15 01:31:23,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:31:23,015 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-09-15 01:31:23,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-15 01:31:23,015 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-09-15 01:31:23,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 01:31:23,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:31:23,015 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:31:23,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:23,216 INFO L427 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:31:23,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:31:23,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1692542375, now seen corresponding path program 363 times [2020-09-15 01:31:23,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:31:23,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813128671] [2020-09-15 01:31:23,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:31:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:31:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:24,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813128671] [2020-09-15 01:31:24,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388223052] [2020-09-15 01:31:24,587 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 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:24,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-15 01:31:24,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:31:24,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 01:31:24,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:31:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:24,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:31:24,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-15 01:31:24,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312581250] [2020-09-15 01:31:24,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:31:24,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:31:24,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:31:24,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:31:24,704 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-09-15 01:31:27,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:31:27,159 INFO L93 Difference]: Finished difference Result 168 states and 399 transitions. [2020-09-15 01:31:27,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:31:27,161 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-09-15 01:31:27,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:31:27,162 INFO L225 Difference]: With dead ends: 168 [2020-09-15 01:31:27,162 INFO L226 Difference]: Without dead ends: 162 [2020-09-15 01:31:27,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-09-15 01:31:27,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-15 01:31:27,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 111. [2020-09-15 01:31:27,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-15 01:31:27,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-09-15 01:31:27,165 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-09-15 01:31:27,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:31:27,165 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-09-15 01:31:27,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:31:27,165 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-09-15 01:31:27,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 01:31:27,166 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:31:27,166 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:31:27,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2020-09-15 01:31:27,366 INFO L427 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:31:27,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:31:27,367 INFO L82 PathProgramCache]: Analyzing trace with hash 778516669, now seen corresponding path program 364 times [2020-09-15 01:31:27,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:31:27,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81430198] [2020-09-15 01:31:27,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:31:27,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:31:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:28,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81430198] [2020-09-15 01:31:28,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667136410] [2020-09-15 01:31:28,764 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 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:28,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:31:28,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:31:28,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 01:31:28,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:31:28,916 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:31:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:28,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:31:28,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-09-15 01:31:28,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326330234] [2020-09-15 01:31:28,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-15 01:31:28,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:31:28,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-15 01:31:28,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:31:28,947 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-09-15 01:31:31,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:31:31,723 INFO L93 Difference]: Finished difference Result 167 states and 397 transitions. [2020-09-15 01:31:31,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:31:31,726 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-15 01:31:31,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:31:31,726 INFO L225 Difference]: With dead ends: 167 [2020-09-15 01:31:31,727 INFO L226 Difference]: Without dead ends: 161 [2020-09-15 01:31:31,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1040, Invalid=2742, Unknown=0, NotChecked=0, Total=3782 [2020-09-15 01:31:31,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-15 01:31:31,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2020-09-15 01:31:31,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-15 01:31:31,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-09-15 01:31:31,730 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-09-15 01:31:31,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:31:31,730 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-09-15 01:31:31,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-15 01:31:31,730 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-09-15 01:31:31,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 01:31:31,730 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:31:31,731 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:31:31,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:31,931 INFO L427 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:31:31,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:31:31,932 INFO L82 PathProgramCache]: Analyzing trace with hash -46757829, now seen corresponding path program 365 times [2020-09-15 01:31:31,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:31:31,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027908079] [2020-09-15 01:31:31,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:31:31,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:31:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:33,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027908079] [2020-09-15 01:31:33,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409314647] [2020-09-15 01:31:33,258 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 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:33,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-15 01:31:33,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:31:33,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 01:31:33,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:31:33,368 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:33,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:31:33,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-15 01:31:33,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032818418] [2020-09-15 01:31:33,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:31:33,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:31:33,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:31:33,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:31:33,369 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-09-15 01:31:36,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:31:36,060 INFO L93 Difference]: Finished difference Result 164 states and 391 transitions. [2020-09-15 01:31:36,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:31:36,063 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-09-15 01:31:36,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:31:36,064 INFO L225 Difference]: With dead ends: 164 [2020-09-15 01:31:36,064 INFO L226 Difference]: Without dead ends: 158 [2020-09-15 01:31:36,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=989, Invalid=2671, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 01:31:36,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-09-15 01:31:36,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 111. [2020-09-15 01:31:36,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-15 01:31:36,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-09-15 01:31:36,066 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-09-15 01:31:36,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:31:36,071 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-09-15 01:31:36,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:31:36,071 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-09-15 01:31:36,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 01:31:36,072 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:31:36,072 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:31:36,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2020-09-15 01:31:36,273 INFO L427 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:31:36,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:31:36,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1085526113, now seen corresponding path program 366 times [2020-09-15 01:31:36,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:31:36,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809592783] [2020-09-15 01:31:36,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:31:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:31:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:37,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809592783] [2020-09-15 01:31:37,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341891453] [2020-09-15 01:31:37,610 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 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:37,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-15 01:31:37,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:31:37,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 01:31:37,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:31:37,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:31:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:37,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:31:37,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-09-15 01:31:37,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723293408] [2020-09-15 01:31:37,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-15 01:31:37,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:31:37,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-15 01:31:37,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:31:37,805 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states.