/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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-60655ea [2020-09-15 01:10:25,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-15 01:10:25,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-15 01:10:25,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-15 01:10:25,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-15 01:10:25,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-15 01:10:25,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-15 01:10:25,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-15 01:10:25,953 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-15 01:10:25,956 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-15 01:10:25,957 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-15 01:10:25,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-15 01:10:25,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-15 01:10:25,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-15 01:10:25,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-15 01:10:25,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-15 01:10:25,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-15 01:10:25,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-15 01:10:25,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-15 01:10:25,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-15 01:10:25,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-15 01:10:25,985 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-15 01:10:25,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-15 01:10:25,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-15 01:10:26,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-15 01:10:26,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-15 01:10:26,013 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-15 01:10:26,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-15 01:10:26,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-15 01:10:26,022 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-15 01:10:26,022 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-15 01:10:26,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-15 01:10:26,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-15 01:10:26,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-15 01:10:26,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-15 01:10:26,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-15 01:10:26,028 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 01:10:26,074 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-15 01:10:26,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-15 01:10:26,077 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-15 01:10:26,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-15 01:10:26,077 INFO L138 SettingsManager]: * Use SBE=true [2020-09-15 01:10:26,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-15 01:10:26,078 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-15 01:10:26,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-15 01:10:26,079 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-15 01:10:26,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-15 01:10:26,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-15 01:10:26,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-15 01:10:26,080 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-15 01:10:26,081 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-15 01:10:26,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-15 01:10:26,081 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-15 01:10:26,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-15 01:10:26,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-15 01:10:26,082 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-15 01:10:26,082 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-15 01:10:26,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-15 01:10:26,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-15 01:10:26,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-15 01:10:26,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-15 01:10:26,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-15 01:10:26,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-15 01:10:26,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-15 01:10:26,084 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-15 01:10:26,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-15 01:10:26,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-15 01:10:26,644 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-15 01:10:26,649 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-15 01:10:26,651 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-15 01:10:26,651 INFO L275 PluginConnector]: CDTParser initialized [2020-09-15 01:10:26,653 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2020-09-15 01:10:26,754 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7aaea171c/f1e905947253438a8dc00f2779309036/FLAG1034d480a [2020-09-15 01:10:27,422 INFO L306 CDTParser]: Found 1 translation units. [2020-09-15 01:10:27,423 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-1.i [2020-09-15 01:10:27,446 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7aaea171c/f1e905947253438a8dc00f2779309036/FLAG1034d480a [2020-09-15 01:10:27,655 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7aaea171c/f1e905947253438a8dc00f2779309036 [2020-09-15 01:10:27,669 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-15 01:10:27,676 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-15 01:10:27,678 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-15 01:10:27,678 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-15 01:10:27,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-15 01:10:27,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 01:10:27" (1/1) ... [2020-09-15 01:10:27,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41581107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:10:27, skipping insertion in model container [2020-09-15 01:10:27,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 01:10:27" (1/1) ... [2020-09-15 01:10:27,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-15 01:10:27,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-15 01:10:28,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 01:10:28,344 INFO L203 MainTranslator]: Completed pre-run [2020-09-15 01:10:28,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 01:10:28,539 INFO L208 MainTranslator]: Completed translation [2020-09-15 01:10:28,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:10:28 WrapperNode [2020-09-15 01:10:28,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-15 01:10:28,542 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-15 01:10:28,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-15 01:10:28,543 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-15 01:10:28,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:10:28" (1/1) ... [2020-09-15 01:10:28,603 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:10:28" (1/1) ... [2020-09-15 01:10:28,637 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-15 01:10:28,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-15 01:10:28,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-15 01:10:28,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-15 01:10:28,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:10:28" (1/1) ... [2020-09-15 01:10:28,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:10:28" (1/1) ... [2020-09-15 01:10:28,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:10:28" (1/1) ... [2020-09-15 01:10:28,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:10:28" (1/1) ... [2020-09-15 01:10:28,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:10:28" (1/1) ... [2020-09-15 01:10:28,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:10:28" (1/1) ... [2020-09-15 01:10:28,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:10:28" (1/1) ... [2020-09-15 01:10:28,674 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-15 01:10:28,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-15 01:10:28,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-15 01:10:28,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-15 01:10:28,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:10:28" (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 01:10:28,756 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-15 01:10:28,757 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-15 01:10:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-15 01:10:28,757 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-15 01:10:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-15 01:10:28,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-15 01:10:28,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-15 01:10:28,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-15 01:10:28,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-15 01:10:28,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-15 01:10:28,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-15 01:10:28,761 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 01:10:29,175 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-15 01:10:29,176 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-15 01:10:29,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 01:10:29 BoogieIcfgContainer [2020-09-15 01:10:29,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-15 01:10:29,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-15 01:10:29,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-15 01:10:29,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-15 01:10:29,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 01:10:27" (1/3) ... [2020-09-15 01:10:29,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6f41df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 01:10:29, skipping insertion in model container [2020-09-15 01:10:29,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:10:28" (2/3) ... [2020-09-15 01:10:29,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6f41df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 01:10:29, skipping insertion in model container [2020-09-15 01:10:29,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 01:10:29" (3/3) ... [2020-09-15 01:10:29,192 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-09-15 01:10:29,206 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-15 01:10:29,207 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-15 01:10:29,220 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-15 01:10:29,222 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-15 01:10:29,253 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,254 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,254 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,254 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,255 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,255 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,256 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,256 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,256 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,260 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,260 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,261 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,261 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,261 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,262 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,262 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,262 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,262 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,263 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,263 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,263 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,264 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,264 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,264 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,265 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,270 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,270 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,271 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,276 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,277 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,277 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,277 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,278 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,278 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,286 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,286 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,287 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,287 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,287 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,287 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:10:29,313 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-15 01:10:29,341 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-15 01:10:29,341 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-15 01:10:29,342 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-15 01:10:29,342 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-15 01:10:29,342 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-15 01:10:29,342 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-15 01:10:29,343 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-15 01:10:29,343 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-15 01:10:29,363 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-15 01:10:29,366 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-15 01:10:29,414 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-15 01:10:29,415 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-15 01:10:29,424 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 01:10:29,427 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-15 01:10:29,450 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-15 01:10:29,451 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-15 01:10:29,452 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 01:10:29,456 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-15 01:10:29,458 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-15 01:10:30,700 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-15 01:10:30,981 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-15 01:10:30,981 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-15 01:10:30,988 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-15 01:10:31,004 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-15 01:10:31,007 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-15 01:10:31,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-15 01:10:31,019 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:31,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-15 01:10:31,021 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:31,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:31,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-15 01:10:31,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:31,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458732371] [2020-09-15 01:10:31,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:31,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:31,359 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 01:10:31,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458732371] [2020-09-15 01:10:31,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:10:31,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-15 01:10:31,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789945216] [2020-09-15 01:10:31,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-15 01:10:31,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:31,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-15 01:10:31,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-15 01:10:31,423 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-15 01:10:31,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:31,542 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-15 01:10:31,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-15 01:10:31,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-15 01:10:31,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:31,565 INFO L225 Difference]: With dead ends: 75 [2020-09-15 01:10:31,565 INFO L226 Difference]: Without dead ends: 42 [2020-09-15 01:10:31,568 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 01:10:31,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-15 01:10:31,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-15 01:10:31,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 01:10:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-15 01:10:31,629 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-15 01:10:31,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:31,630 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-15 01:10:31,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-15 01:10:31,630 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-15 01:10:31,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-15 01:10:31,631 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:31,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:31,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-15 01:10:31,632 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:31,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:31,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-15 01:10:31,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:31,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558268339] [2020-09-15 01:10:31,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:31,758 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 01:10:31,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558268339] [2020-09-15 01:10:31,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:10:31,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 01:10:31,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188242815] [2020-09-15 01:10:31,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 01:10:31,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:31,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 01:10:31,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-15 01:10:31,769 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-15 01:10:31,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:31,818 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-15 01:10:31,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-15 01:10:31,819 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-15 01:10:31,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:31,820 INFO L225 Difference]: With dead ends: 56 [2020-09-15 01:10:31,821 INFO L226 Difference]: Without dead ends: 50 [2020-09-15 01:10:31,822 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 01:10:31,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-15 01:10:31,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-15 01:10:31,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 01:10:31,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-15 01:10:31,831 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-15 01:10:31,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:31,832 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-15 01:10:31,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 01:10:31,833 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-15 01:10:31,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:10:31,834 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:31,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:31,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-15 01:10:31,835 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:31,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:31,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-15 01:10:31,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:31,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769552301] [2020-09-15 01:10:31,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:31,952 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 01:10:31,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769552301] [2020-09-15 01:10:31,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:10:31,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-15 01:10:31,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301334903] [2020-09-15 01:10:31,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-15 01:10:31,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:31,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-15 01:10:31,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-15 01:10:31,955 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-09-15 01:10:32,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:32,050 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-15 01:10:32,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 01:10:32,051 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-15 01:10:32,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:32,052 INFO L225 Difference]: With dead ends: 78 [2020-09-15 01:10:32,053 INFO L226 Difference]: Without dead ends: 71 [2020-09-15 01:10:32,053 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 01:10:32,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-15 01:10:32,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-09-15 01:10:32,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 01:10:32,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-15 01:10:32,063 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-09-15 01:10:32,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:32,064 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-15 01:10:32,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-15 01:10:32,064 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-15 01:10:32,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:10:32,065 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:32,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:32,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-15 01:10:32,066 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:32,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:32,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-09-15 01:10:32,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:32,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529409826] [2020-09-15 01:10:32,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:32,204 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 01:10:32,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529409826] [2020-09-15 01:10:32,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:10:32,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-15 01:10:32,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523142059] [2020-09-15 01:10:32,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-15 01:10:32,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:32,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-15 01:10:32,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-15 01:10:32,207 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-09-15 01:10:32,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:32,291 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-15 01:10:32,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-15 01:10:32,292 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-15 01:10:32,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:32,293 INFO L225 Difference]: With dead ends: 54 [2020-09-15 01:10:32,293 INFO L226 Difference]: Without dead ends: 43 [2020-09-15 01:10:32,294 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 01:10:32,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-15 01:10:32,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-15 01:10:32,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-15 01:10:32,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-09-15 01:10:32,300 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-09-15 01:10:32,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:32,300 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-09-15 01:10:32,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-15 01:10:32,301 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-09-15 01:10:32,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:10:32,301 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:32,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:32,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-15 01:10:32,302 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:32,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:32,303 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-09-15 01:10:32,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:32,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167601898] [2020-09-15 01:10:32,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:32,389 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 01:10:32,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167601898] [2020-09-15 01:10:32,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:10:32,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-15 01:10:32,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503327867] [2020-09-15 01:10:32,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-15 01:10:32,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:32,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-15 01:10:32,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-15 01:10:32,393 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-09-15 01:10:32,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:32,478 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-09-15 01:10:32,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-15 01:10:32,479 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-15 01:10:32,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:32,480 INFO L225 Difference]: With dead ends: 57 [2020-09-15 01:10:32,480 INFO L226 Difference]: Without dead ends: 51 [2020-09-15 01:10:32,481 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 01:10:32,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-15 01:10:32,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-09-15 01:10:32,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-15 01:10:32,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-15 01:10:32,487 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-09-15 01:10:32,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:32,487 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-15 01:10:32,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-15 01:10:32,488 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-15 01:10:32,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:10:32,489 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:32,489 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:32,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-15 01:10:32,489 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:32,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:32,490 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-09-15 01:10:32,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:32,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815136049] [2020-09-15 01:10:32,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:32,601 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 01:10:32,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815136049] [2020-09-15 01:10:32,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855965207] [2020-09-15 01:10:32,602 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 01:10:32,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:10:32,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:32,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:10:32,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:32,732 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:10:32,752 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 01:10:32,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:32,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-15 01:10:32,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663223076] [2020-09-15 01:10:32,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 01:10:32,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:32,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 01:10:32,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-15 01:10:32,754 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-09-15 01:10:32,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:32,866 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-09-15 01:10:32,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 01:10:32,867 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-15 01:10:32,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:32,869 INFO L225 Difference]: With dead ends: 48 [2020-09-15 01:10:32,869 INFO L226 Difference]: Without dead ends: 43 [2020-09-15 01:10:32,870 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 01:10:32,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-15 01:10:32,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-15 01:10:32,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-15 01:10:32,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-15 01:10:32,875 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-09-15 01:10:32,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:32,876 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-15 01:10:32,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 01:10:32,876 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-15 01:10:32,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:10:32,877 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:32,877 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:33,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-15 01:10:33,081 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:33,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:33,082 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-09-15 01:10:33,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:33,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344353786] [2020-09-15 01:10:33,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:33,169 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 01:10:33,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344353786] [2020-09-15 01:10:33,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437199252] [2020-09-15 01:10:33,171 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 01:10:33,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:10:33,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:33,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:10:33,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:33,254 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 01:10:33,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:33,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-15 01:10:33,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691939299] [2020-09-15 01:10:33,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 01:10:33,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:33,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 01:10:33,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-15 01:10:33,256 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-09-15 01:10:33,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:33,357 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-15 01:10:33,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 01:10:33,358 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-15 01:10:33,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:33,359 INFO L225 Difference]: With dead ends: 54 [2020-09-15 01:10:33,359 INFO L226 Difference]: Without dead ends: 48 [2020-09-15 01:10:33,361 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 01:10:33,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-15 01:10:33,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-15 01:10:33,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 01:10:33,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-15 01:10:33,367 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-09-15 01:10:33,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:33,367 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-15 01:10:33,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 01:10:33,367 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-15 01:10:33,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:10:33,368 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:33,369 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:33,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:33,583 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:33,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:33,584 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-09-15 01:10:33,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:33,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443441914] [2020-09-15 01:10:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:33,674 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 01:10:33,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443441914] [2020-09-15 01:10:33,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586032881] [2020-09-15 01:10:33,676 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 01:10:33,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:10:33,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:33,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:10:33,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:33,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:33,796 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 01:10:33,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:33,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-15 01:10:33,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080539955] [2020-09-15 01:10:33,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 01:10:33,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:33,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 01:10:33,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-15 01:10:33,800 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-09-15 01:10:33,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:33,938 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-09-15 01:10:33,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 01:10:33,939 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-15 01:10:33,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:33,940 INFO L225 Difference]: With dead ends: 58 [2020-09-15 01:10:33,940 INFO L226 Difference]: Without dead ends: 52 [2020-09-15 01:10:33,941 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 01:10:33,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-15 01:10:33,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-15 01:10:33,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-15 01:10:33,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-15 01:10:33,952 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-09-15 01:10:33,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:33,953 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-15 01:10:33,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 01:10:33,953 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-15 01:10:33,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:10:33,958 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:33,959 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:34,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:34,161 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:34,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:34,161 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-09-15 01:10:34,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:34,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339409051] [2020-09-15 01:10:34,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:34,286 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 01:10:34,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339409051] [2020-09-15 01:10:34,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403270127] [2020-09-15 01:10:34,287 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 01:10:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:34,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:10:34,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:34,426 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 01:10:34,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:34,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-15 01:10:34,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030309151] [2020-09-15 01:10:34,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 01:10:34,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:34,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 01:10:34,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-15 01:10:34,429 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-09-15 01:10:34,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:34,637 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-15 01:10:34,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:10:34,639 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-15 01:10:34,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:34,641 INFO L225 Difference]: With dead ends: 78 [2020-09-15 01:10:34,641 INFO L226 Difference]: Without dead ends: 72 [2020-09-15 01:10:34,642 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 01:10:34,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-15 01:10:34,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-09-15 01:10:34,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 01:10:34,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-09-15 01:10:34,659 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-09-15 01:10:34,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:34,660 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-09-15 01:10:34,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 01:10:34,660 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-09-15 01:10:34,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:10:34,661 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:34,662 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:34,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:34,876 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:34,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:34,877 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-09-15 01:10:34,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:34,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47686262] [2020-09-15 01:10:34,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:35,020 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 01:10:35,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47686262] [2020-09-15 01:10:35,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367574114] [2020-09-15 01:10:35,021 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 01:10:35,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:10:35,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:35,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:10:35,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:35,128 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:35,141 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 01:10:35,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:35,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-15 01:10:35,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932455855] [2020-09-15 01:10:35,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 01:10:35,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:35,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 01:10:35,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-15 01:10:35,144 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-09-15 01:10:35,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:35,373 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-09-15 01:10:35,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:10:35,373 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-15 01:10:35,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:35,374 INFO L225 Difference]: With dead ends: 62 [2020-09-15 01:10:35,374 INFO L226 Difference]: Without dead ends: 54 [2020-09-15 01:10:35,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:10:35,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-15 01:10:35,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-09-15 01:10:35,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-15 01:10:35,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-09-15 01:10:35,380 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-09-15 01:10:35,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:35,380 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-09-15 01:10:35,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 01:10:35,380 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-09-15 01:10:35,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:10:35,381 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:35,381 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:35,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-15 01:10:35,592 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:35,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:35,592 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-09-15 01:10:35,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:35,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383962988] [2020-09-15 01:10:35,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:35,737 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 01:10:35,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383962988] [2020-09-15 01:10:35,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99529193] [2020-09-15 01:10:35,739 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 01:10:35,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:10:35,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:35,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:10:35,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:35,831 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 01:10:35,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:35,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-15 01:10:35,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401008682] [2020-09-15 01:10:35,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 01:10:35,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:35,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 01:10:35,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-15 01:10:35,833 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-09-15 01:10:35,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:35,952 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-09-15 01:10:35,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:10:35,952 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-15 01:10:35,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:35,953 INFO L225 Difference]: With dead ends: 64 [2020-09-15 01:10:35,954 INFO L226 Difference]: Without dead ends: 58 [2020-09-15 01:10:35,954 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 01:10:35,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-15 01:10:35,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-15 01:10:35,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-15 01:10:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-09-15 01:10:35,959 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-09-15 01:10:35,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:35,960 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-09-15 01:10:35,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 01:10:35,960 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-09-15 01:10:35,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:10:35,961 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:35,961 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:36,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:36,174 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:36,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:36,174 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-09-15 01:10:36,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:36,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107159985] [2020-09-15 01:10:36,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:36,296 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 01:10:36,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107159985] [2020-09-15 01:10:36,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003004048] [2020-09-15 01:10:36,297 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 01:10:36,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:10:36,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:36,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:10:36,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:36,391 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:36,407 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 01:10:36,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:36,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-15 01:10:36,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176441362] [2020-09-15 01:10:36,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:10:36,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:36,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:10:36,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:10:36,409 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-09-15 01:10:36,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:36,597 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-09-15 01:10:36,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:10:36,598 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-15 01:10:36,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:36,599 INFO L225 Difference]: With dead ends: 61 [2020-09-15 01:10:36,599 INFO L226 Difference]: Without dead ends: 55 [2020-09-15 01:10:36,600 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 01:10:36,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-15 01:10:36,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-09-15 01:10:36,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-15 01:10:36,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-15 01:10:36,616 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-09-15 01:10:36,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:36,616 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-15 01:10:36,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:10:36,617 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-15 01:10:36,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:10:36,617 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:36,618 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:36,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:36,833 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:36,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:36,834 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-09-15 01:10:36,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:36,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532266451] [2020-09-15 01:10:36,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:36,919 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 01:10:36,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532266451] [2020-09-15 01:10:36,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188538051] [2020-09-15 01:10:36,920 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 01:10:36,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:10:36,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:36,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:10:36,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:36,995 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 01:10:36,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:36,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-15 01:10:36,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662470052] [2020-09-15 01:10:36,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 01:10:36,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:36,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 01:10:36,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-15 01:10:36,998 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-09-15 01:10:37,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:37,177 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-15 01:10:37,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:10:37,177 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-15 01:10:37,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:37,179 INFO L225 Difference]: With dead ends: 77 [2020-09-15 01:10:37,179 INFO L226 Difference]: Without dead ends: 71 [2020-09-15 01:10:37,179 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 01:10:37,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-15 01:10:37,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-09-15 01:10:37,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-15 01:10:37,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-09-15 01:10:37,190 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-09-15 01:10:37,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:37,196 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-09-15 01:10:37,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 01:10:37,197 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-09-15 01:10:37,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:10:37,197 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:37,197 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:37,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-15 01:10:37,399 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:37,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:37,400 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-09-15 01:10:37,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:37,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638414776] [2020-09-15 01:10:37,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:37,495 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 01:10:37,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638414776] [2020-09-15 01:10:37,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528493571] [2020-09-15 01:10:37,496 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 01:10:37,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:10:37,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:37,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:10:37,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:37,589 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 01:10:37,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:37,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-15 01:10:37,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304598803] [2020-09-15 01:10:37,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:10:37,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:37,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:10:37,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:10:37,592 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-09-15 01:10:37,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:37,833 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-09-15 01:10:37,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:10:37,834 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-15 01:10:37,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:37,835 INFO L225 Difference]: With dead ends: 56 [2020-09-15 01:10:37,835 INFO L226 Difference]: Without dead ends: 48 [2020-09-15 01:10:37,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:10:37,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-15 01:10:37,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-09-15 01:10:37,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-15 01:10:37,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-09-15 01:10:37,841 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-09-15 01:10:37,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:37,841 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-09-15 01:10:37,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:10:37,841 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-09-15 01:10:37,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:10:37,843 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:37,843 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:38,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:38,053 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:38,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:38,054 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-09-15 01:10:38,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:38,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799955284] [2020-09-15 01:10:38,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:38,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:38,133 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 01:10:38,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799955284] [2020-09-15 01:10:38,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133752297] [2020-09-15 01:10:38,134 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 01:10:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:38,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:10:38,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:38,225 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:10:38,239 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 01:10:38,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:38,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-15 01:10:38,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751317789] [2020-09-15 01:10:38,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:10:38,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:38,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:10:38,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:10:38,242 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-09-15 01:10:38,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:38,494 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-09-15 01:10:38,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:10:38,495 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-15 01:10:38,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:38,496 INFO L225 Difference]: With dead ends: 60 [2020-09-15 01:10:38,496 INFO L226 Difference]: Without dead ends: 55 [2020-09-15 01:10:38,497 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 01:10:38,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-15 01:10:38,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-09-15 01:10:38,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 01:10:38,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-15 01:10:38,501 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-09-15 01:10:38,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:38,501 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-15 01:10:38,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:10:38,502 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-15 01:10:38,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:10:38,502 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:38,502 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:38,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-15 01:10:38,714 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:38,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:38,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-09-15 01:10:38,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:38,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306942921] [2020-09-15 01:10:38,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:38,798 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 01:10:38,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306942921] [2020-09-15 01:10:38,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877061187] [2020-09-15 01:10:38,799 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 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 01:10:38,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:10:38,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:38,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:10:38,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:38,889 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:10:38,903 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 01:10:38,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:38,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-15 01:10:38,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522581898] [2020-09-15 01:10:38,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:10:38,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:38,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:10:38,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:10:38,905 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-09-15 01:10:39,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:39,173 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-09-15 01:10:39,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:10:39,174 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 01:10:39,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:39,175 INFO L225 Difference]: With dead ends: 54 [2020-09-15 01:10:39,175 INFO L226 Difference]: Without dead ends: 49 [2020-09-15 01:10:39,176 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 01:10:39,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-15 01:10:39,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-15 01:10:39,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-15 01:10:39,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-15 01:10:39,181 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-09-15 01:10:39,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:39,181 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-15 01:10:39,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:10:39,181 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-15 01:10:39,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:10:39,182 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:39,182 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:39,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-15 01:10:39,394 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:39,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:39,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-09-15 01:10:39,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:39,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217269292] [2020-09-15 01:10:39,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:39,537 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 01:10:39,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217269292] [2020-09-15 01:10:39,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758217709] [2020-09-15 01:10:39,537 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 01:10:39,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:10:39,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:39,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:10:39,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:39,624 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 01:10:39,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:39,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-15 01:10:39,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431462895] [2020-09-15 01:10:39,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:10:39,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:39,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:10:39,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:10:39,627 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-09-15 01:10:39,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:39,790 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-09-15 01:10:39,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:10:39,791 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-15 01:10:39,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:39,792 INFO L225 Difference]: With dead ends: 60 [2020-09-15 01:10:39,792 INFO L226 Difference]: Without dead ends: 54 [2020-09-15 01:10:39,793 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 01:10:39,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-15 01:10:39,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-15 01:10:39,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 01:10:39,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-15 01:10:39,799 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-09-15 01:10:39,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:39,799 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-15 01:10:39,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:10:39,800 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-15 01:10:39,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:10:39,800 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:39,800 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:40,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-15 01:10:40,013 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:40,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:40,014 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-09-15 01:10:40,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:40,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320094667] [2020-09-15 01:10:40,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:40,114 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 01:10:40,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320094667] [2020-09-15 01:10:40,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912922789] [2020-09-15 01:10:40,115 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 01:10:40,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:10:40,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:40,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:10:40,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:40,195 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:40,208 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 01:10:40,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:40,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-15 01:10:40,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546374927] [2020-09-15 01:10:40,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:10:40,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:40,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:10:40,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:10:40,210 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-09-15 01:10:40,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:40,382 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-09-15 01:10:40,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:10:40,384 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 01:10:40,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:40,385 INFO L225 Difference]: With dead ends: 66 [2020-09-15 01:10:40,385 INFO L226 Difference]: Without dead ends: 60 [2020-09-15 01:10:40,385 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 01:10:40,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-15 01:10:40,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-09-15 01:10:40,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-15 01:10:40,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-15 01:10:40,389 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-09-15 01:10:40,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:40,389 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-15 01:10:40,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:10:40,389 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-15 01:10:40,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:10:40,390 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:40,390 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:40,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-15 01:10:40,602 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:40,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:40,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-09-15 01:10:40,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:40,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158936900] [2020-09-15 01:10:40,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:40,711 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 01:10:40,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158936900] [2020-09-15 01:10:40,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112115727] [2020-09-15 01:10:40,712 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 01:10:40,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:10:40,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:40,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:10:40,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:40,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:40,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-15 01:10:40,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142854809] [2020-09-15 01:10:40,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:10:40,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:40,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:10:40,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:10:40,807 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-09-15 01:10:41,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:41,021 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-09-15 01:10:41,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:10:41,022 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-15 01:10:41,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:41,023 INFO L225 Difference]: With dead ends: 67 [2020-09-15 01:10:41,023 INFO L226 Difference]: Without dead ends: 61 [2020-09-15 01:10:41,024 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 01:10:41,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-15 01:10:41,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-09-15 01:10:41,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-15 01:10:41,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-09-15 01:10:41,027 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-09-15 01:10:41,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:41,028 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-09-15 01:10:41,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:10:41,028 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-09-15 01:10:41,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:10:41,029 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:41,029 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:41,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:41,238 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:41,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:41,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-09-15 01:10:41,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:41,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812977226] [2020-09-15 01:10:41,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:41,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812977226] [2020-09-15 01:10:41,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137565771] [2020-09-15 01:10:41,328 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 01:10:41,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:10:41,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:41,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:10:41,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:41,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:41,418 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 01:10:41,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:41,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-15 01:10:41,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328247280] [2020-09-15 01:10:41,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:10:41,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:41,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:10:41,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:10:41,420 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-09-15 01:10:41,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:41,735 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-09-15 01:10:41,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:10:41,736 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 01:10:41,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:41,737 INFO L225 Difference]: With dead ends: 69 [2020-09-15 01:10:41,737 INFO L226 Difference]: Without dead ends: 63 [2020-09-15 01:10:41,738 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 01:10:41,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-15 01:10:41,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-15 01:10:41,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 01:10:41,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-15 01:10:41,741 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-09-15 01:10:41,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:41,741 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-15 01:10:41,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:10:41,742 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-15 01:10:41,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:10:41,742 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:41,742 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:41,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:41,953 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:41,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:41,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-09-15 01:10:41,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:41,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281776777] [2020-09-15 01:10:41,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:42,041 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 01:10:42,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281776777] [2020-09-15 01:10:42,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116179209] [2020-09-15 01:10:42,042 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 01:10:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:42,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:10:42,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:42,132 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 01:10:42,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:42,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-15 01:10:42,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819983419] [2020-09-15 01:10:42,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:10:42,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:42,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:10:42,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:10:42,135 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-09-15 01:10:42,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:42,384 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-15 01:10:42,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:10:42,390 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-15 01:10:42,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:42,391 INFO L225 Difference]: With dead ends: 88 [2020-09-15 01:10:42,391 INFO L226 Difference]: Without dead ends: 82 [2020-09-15 01:10:42,392 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 01:10:42,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-15 01:10:42,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-09-15 01:10:42,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-15 01:10:42,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-09-15 01:10:42,398 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-09-15 01:10:42,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:42,398 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-09-15 01:10:42,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:10:42,398 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-09-15 01:10:42,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:10:42,399 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:42,399 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:42,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:42,600 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:42,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:42,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-09-15 01:10:42,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:42,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210222226] [2020-09-15 01:10:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:42,746 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 01:10:42,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210222226] [2020-09-15 01:10:42,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214284843] [2020-09-15 01:10:42,747 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 01:10:42,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:10:42,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:42,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:10:42,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:42,824 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:42,835 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 01:10:42,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:42,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-15 01:10:42,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451608443] [2020-09-15 01:10:42,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:10:42,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:42,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:10:42,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:10:42,837 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-09-15 01:10:43,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:43,169 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-15 01:10:43,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:10:43,169 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 01:10:43,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:43,170 INFO L225 Difference]: With dead ends: 69 [2020-09-15 01:10:43,171 INFO L226 Difference]: Without dead ends: 61 [2020-09-15 01:10:43,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:10:43,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-15 01:10:43,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-09-15 01:10:43,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-15 01:10:43,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-09-15 01:10:43,175 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-09-15 01:10:43,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:43,175 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-09-15 01:10:43,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:10:43,176 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-09-15 01:10:43,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:10:43,179 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:43,179 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:43,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-15 01:10:43,390 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:43,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:43,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-09-15 01:10:43,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:43,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785402262] [2020-09-15 01:10:43,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:43,491 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 01:10:43,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785402262] [2020-09-15 01:10:43,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459634032] [2020-09-15 01:10:43,492 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 01:10:43,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:10:43,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:43,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:10:43,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:43,627 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 01:10:43,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:43,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-15 01:10:43,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139429612] [2020-09-15 01:10:43,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:10:43,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:43,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:10:43,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:10:43,637 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-09-15 01:10:43,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:43,833 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-15 01:10:43,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:10:43,834 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-15 01:10:43,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:43,835 INFO L225 Difference]: With dead ends: 74 [2020-09-15 01:10:43,835 INFO L226 Difference]: Without dead ends: 68 [2020-09-15 01:10:43,836 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 01:10:43,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-15 01:10:43,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-09-15 01:10:43,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-15 01:10:43,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-15 01:10:43,840 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-15 01:10:43,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:43,844 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-15 01:10:43,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:10:43,845 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-15 01:10:43,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:10:43,845 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:43,846 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:44,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-15 01:10:44,047 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:44,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:44,047 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-09-15 01:10:44,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:44,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399967953] [2020-09-15 01:10:44,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:44,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:44,179 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 01:10:44,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399967953] [2020-09-15 01:10:44,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361591140] [2020-09-15 01:10:44,180 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 01:10:44,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:10:44,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:44,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:10:44,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:44,269 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:44,288 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 01:10:44,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:44,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-15 01:10:44,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838779666] [2020-09-15 01:10:44,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:10:44,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:44,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:10:44,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:10:44,293 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-15 01:10:44,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:44,535 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-09-15 01:10:44,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:10:44,536 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 01:10:44,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:44,537 INFO L225 Difference]: With dead ends: 71 [2020-09-15 01:10:44,537 INFO L226 Difference]: Without dead ends: 65 [2020-09-15 01:10:44,538 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 01:10:44,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-15 01:10:44,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-09-15 01:10:44,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 01:10:44,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-15 01:10:44,540 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-15 01:10:44,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:44,540 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-15 01:10:44,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:10:44,541 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-15 01:10:44,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:10:44,541 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:44,541 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:44,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-15 01:10:44,751 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:44,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:44,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-09-15 01:10:44,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:44,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631176981] [2020-09-15 01:10:44,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:44,844 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 01:10:44,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631176981] [2020-09-15 01:10:44,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841181] [2020-09-15 01:10:44,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:10:44,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:10:44,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:44,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:10:44,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:44,918 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 01:10:44,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:44,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-15 01:10:44,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157705203] [2020-09-15 01:10:44,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:10:44,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:44,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:10:44,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:10:44,921 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-15 01:10:45,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:45,144 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-09-15 01:10:45,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:10:45,144 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-15 01:10:45,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:45,145 INFO L225 Difference]: With dead ends: 68 [2020-09-15 01:10:45,146 INFO L226 Difference]: Without dead ends: 62 [2020-09-15 01:10:45,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:10:45,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-15 01:10:45,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-15 01:10:45,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-15 01:10:45,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-15 01:10:45,149 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-15 01:10:45,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:45,149 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-15 01:10:45,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:10:45,150 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-15 01:10:45,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:10:45,150 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:45,150 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:45,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-15 01:10:45,358 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:45,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:45,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-09-15 01:10:45,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:45,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529221718] [2020-09-15 01:10:45,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:45,469 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 01:10:45,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529221718] [2020-09-15 01:10:45,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405653187] [2020-09-15 01:10:45,469 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 01:10:45,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:10:45,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:45,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:10:45,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:45,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:45,584 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 01:10:45,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:45,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-15 01:10:45,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434356532] [2020-09-15 01:10:45,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:10:45,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:45,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:10:45,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:10:45,587 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-15 01:10:45,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:45,941 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-09-15 01:10:45,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:10:45,942 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 01:10:45,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:45,943 INFO L225 Difference]: With dead ends: 67 [2020-09-15 01:10:45,943 INFO L226 Difference]: Without dead ends: 61 [2020-09-15 01:10:45,944 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 01:10:45,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-15 01:10:45,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-09-15 01:10:45,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 01:10:45,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-15 01:10:45,948 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-15 01:10:45,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:45,948 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-15 01:10:45,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:10:45,949 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-15 01:10:45,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:10:45,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:45,949 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:46,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-15 01:10:46,159 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:46,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:46,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-09-15 01:10:46,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:46,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112554673] [2020-09-15 01:10:46,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:46,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:46,264 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 01:10:46,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112554673] [2020-09-15 01:10:46,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668477581] [2020-09-15 01:10:46,265 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 01:10:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:46,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:10:46,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:46,342 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 01:10:46,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:46,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-15 01:10:46,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906631866] [2020-09-15 01:10:46,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:10:46,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:46,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:10:46,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:10:46,344 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-15 01:10:46,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:46,639 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-15 01:10:46,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:10:46,640 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-15 01:10:46,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:46,641 INFO L225 Difference]: With dead ends: 83 [2020-09-15 01:10:46,641 INFO L226 Difference]: Without dead ends: 77 [2020-09-15 01:10:46,641 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 01:10:46,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-15 01:10:46,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-09-15 01:10:46,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-15 01:10:46,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-09-15 01:10:46,645 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-09-15 01:10:46,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:46,645 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-09-15 01:10:46,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:10:46,645 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-09-15 01:10:46,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:10:46,646 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:46,646 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:46,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:46,847 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:46,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:46,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-09-15 01:10:46,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:46,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880839987] [2020-09-15 01:10:46,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:46,942 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 01:10:46,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880839987] [2020-09-15 01:10:46,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505039888] [2020-09-15 01:10:46,942 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 01:10:47,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:10:47,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:47,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:10:47,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:47,050 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 01:10:47,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:47,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-15 01:10:47,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235306610] [2020-09-15 01:10:47,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:10:47,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:47,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:10:47,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:10:47,053 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-09-15 01:10:47,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:47,437 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-09-15 01:10:47,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:10:47,438 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 01:10:47,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:47,439 INFO L225 Difference]: With dead ends: 62 [2020-09-15 01:10:47,439 INFO L226 Difference]: Without dead ends: 54 [2020-09-15 01:10:47,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:10:47,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-15 01:10:47,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-09-15 01:10:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-15 01:10:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-09-15 01:10:47,444 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-09-15 01:10:47,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:47,444 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-09-15 01:10:47,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:10:47,444 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-09-15 01:10:47,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:10:47,445 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:47,445 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:47,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-15 01:10:47,646 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:47,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:47,646 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-09-15 01:10:47,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:47,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944452700] [2020-09-15 01:10:47,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:47,746 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 01:10:47,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944452700] [2020-09-15 01:10:47,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392830332] [2020-09-15 01:10:47,747 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 01:10:47,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:10:47,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:47,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:10:47,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:47,846 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:10:47,861 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 01:10:47,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:47,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-15 01:10:47,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699459687] [2020-09-15 01:10:47,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:10:47,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:47,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:10:47,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:10:47,863 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-09-15 01:10:48,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:48,178 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-09-15 01:10:48,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:10:48,178 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 01:10:48,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:48,179 INFO L225 Difference]: With dead ends: 68 [2020-09-15 01:10:48,179 INFO L226 Difference]: Without dead ends: 63 [2020-09-15 01:10:48,180 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 01:10:48,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-15 01:10:48,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-09-15 01:10:48,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-15 01:10:48,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-15 01:10:48,182 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-09-15 01:10:48,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:48,183 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-15 01:10:48,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:10:48,183 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-15 01:10:48,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:10:48,183 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:48,183 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:48,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-15 01:10:48,384 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:48,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:48,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-09-15 01:10:48,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:48,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437499682] [2020-09-15 01:10:48,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:48,486 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 01:10:48,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437499682] [2020-09-15 01:10:48,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656202742] [2020-09-15 01:10:48,487 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 01:10:48,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:10:48,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:48,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:10:48,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:48,577 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:10:48,591 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 01:10:48,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:48,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-15 01:10:48,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329215875] [2020-09-15 01:10:48,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:10:48,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:48,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:10:48,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:10:48,593 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-09-15 01:10:48,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:48,932 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-09-15 01:10:48,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:10:48,932 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 01:10:48,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:48,933 INFO L225 Difference]: With dead ends: 60 [2020-09-15 01:10:48,933 INFO L226 Difference]: Without dead ends: 55 [2020-09-15 01:10:48,934 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 01:10:48,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-15 01:10:48,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-15 01:10:48,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 01:10:48,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-15 01:10:48,937 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-09-15 01:10:48,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:48,937 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-15 01:10:48,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:10:48,937 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-15 01:10:48,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:10:48,938 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:48,938 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:49,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:49,146 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:49,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:49,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-09-15 01:10:49,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:49,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110257525] [2020-09-15 01:10:49,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:49,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:49,272 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 01:10:49,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110257525] [2020-09-15 01:10:49,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801552982] [2020-09-15 01:10:49,273 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 01:10:49,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 01:10:49,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:49,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:10:49,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:49,351 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 01:10:49,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:49,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 01:10:49,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260282295] [2020-09-15 01:10:49,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:10:49,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:49,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:10:49,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:10:49,353 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-09-15 01:10:49,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:49,541 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-09-15 01:10:49,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:10:49,542 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-15 01:10:49,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:49,543 INFO L225 Difference]: With dead ends: 66 [2020-09-15 01:10:49,543 INFO L226 Difference]: Without dead ends: 60 [2020-09-15 01:10:49,544 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 01:10:49,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-15 01:10:49,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-15 01:10:49,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 01:10:49,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-15 01:10:49,546 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-09-15 01:10:49,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:49,547 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-15 01:10:49,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:10:49,547 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-15 01:10:49,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:10:49,548 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:49,548 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:49,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:49,757 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:49,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:49,758 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-09-15 01:10:49,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:49,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241405263] [2020-09-15 01:10:49,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:49,904 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 01:10:49,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241405263] [2020-09-15 01:10:49,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820520393] [2020-09-15 01:10:49,905 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 01:10:49,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:10:49,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:49,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:10:49,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:49,992 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:50,004 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 01:10:50,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:50,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-15 01:10:50,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168787230] [2020-09-15 01:10:50,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:10:50,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:50,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:10:50,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:10:50,006 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-09-15 01:10:50,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:50,214 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-09-15 01:10:50,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:10:50,215 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 01:10:50,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:50,216 INFO L225 Difference]: With dead ends: 74 [2020-09-15 01:10:50,216 INFO L226 Difference]: Without dead ends: 68 [2020-09-15 01:10:50,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:10:50,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-15 01:10:50,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-15 01:10:50,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-15 01:10:50,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-09-15 01:10:50,218 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-09-15 01:10:50,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:50,219 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-09-15 01:10:50,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:10:50,219 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-09-15 01:10:50,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:10:50,219 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:50,219 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:50,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-15 01:10:50,426 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:50,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:50,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-09-15 01:10:50,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:50,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132518298] [2020-09-15 01:10:50,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:50,554 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 01:10:50,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132518298] [2020-09-15 01:10:50,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567765702] [2020-09-15 01:10:50,555 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 01:10:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:50,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:10:50,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:50,628 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 01:10:50,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:50,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 01:10:50,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219333236] [2020-09-15 01:10:50,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:10:50,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:50,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:10:50,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:10:50,630 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-09-15 01:10:50,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:50,902 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-09-15 01:10:50,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:10:50,902 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-15 01:10:50,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:50,903 INFO L225 Difference]: With dead ends: 75 [2020-09-15 01:10:50,903 INFO L226 Difference]: Without dead ends: 69 [2020-09-15 01:10:50,904 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 01:10:50,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-15 01:10:50,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-09-15 01:10:50,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-15 01:10:50,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-15 01:10:50,907 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-09-15 01:10:50,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:50,907 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-15 01:10:50,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:10:50,909 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-15 01:10:50,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:10:50,909 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:50,909 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:51,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:51,112 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:51,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:51,112 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-09-15 01:10:51,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:51,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618836502] [2020-09-15 01:10:51,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:51,242 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 01:10:51,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618836502] [2020-09-15 01:10:51,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682036409] [2020-09-15 01:10:51,243 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 01:10:51,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:10:51,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:51,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:10:51,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:51,324 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:51,339 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 01:10:51,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:51,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-15 01:10:51,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158815233] [2020-09-15 01:10:51,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:10:51,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:51,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:10:51,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:10:51,341 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-09-15 01:10:51,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:51,614 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-09-15 01:10:51,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:10:51,615 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 01:10:51,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:51,616 INFO L225 Difference]: With dead ends: 79 [2020-09-15 01:10:51,616 INFO L226 Difference]: Without dead ends: 73 [2020-09-15 01:10:51,616 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 01:10:51,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-15 01:10:51,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-09-15 01:10:51,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 01:10:51,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-15 01:10:51,619 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-09-15 01:10:51,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:51,619 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-15 01:10:51,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:10:51,619 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-15 01:10:51,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:10:51,620 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:51,620 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:51,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-15 01:10:51,827 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:51,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:51,827 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-09-15 01:10:51,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:51,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127284625] [2020-09-15 01:10:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:51,942 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 01:10:51,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127284625] [2020-09-15 01:10:51,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115750079] [2020-09-15 01:10:51,943 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 01:10:52,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-15 01:10:52,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:52,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:10:52,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:52,041 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 01:10:52,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:52,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 01:10:52,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811222423] [2020-09-15 01:10:52,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:10:52,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:52,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:10:52,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:10:52,043 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-09-15 01:10:52,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:52,393 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-09-15 01:10:52,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:10:52,393 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-15 01:10:52,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:52,394 INFO L225 Difference]: With dead ends: 79 [2020-09-15 01:10:52,394 INFO L226 Difference]: Without dead ends: 73 [2020-09-15 01:10:52,395 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 01:10:52,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-15 01:10:52,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-09-15 01:10:52,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-15 01:10:52,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-09-15 01:10:52,398 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-09-15 01:10:52,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:52,402 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-09-15 01:10:52,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:10:52,402 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-09-15 01:10:52,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:10:52,403 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:52,403 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:52,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:52,604 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:52,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:52,605 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-09-15 01:10:52,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:52,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374145550] [2020-09-15 01:10:52,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:52,714 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 01:10:52,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374145550] [2020-09-15 01:10:52,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519511032] [2020-09-15 01:10:52,715 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 01:10:52,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:10:52,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:52,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:10:52,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:52,791 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:52,807 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 01:10:52,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:52,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-15 01:10:52,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840639414] [2020-09-15 01:10:52,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:10:52,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:52,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:10:52,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:10:52,809 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-09-15 01:10:53,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:53,198 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-09-15 01:10:53,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:10:53,199 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 01:10:53,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:53,200 INFO L225 Difference]: With dead ends: 76 [2020-09-15 01:10:53,200 INFO L226 Difference]: Without dead ends: 70 [2020-09-15 01:10:53,200 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 01:10:53,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-15 01:10:53,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-09-15 01:10:53,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-15 01:10:53,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-15 01:10:53,203 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-09-15 01:10:53,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:53,203 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-15 01:10:53,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:10:53,204 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-15 01:10:53,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:10:53,204 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:53,204 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:53,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-15 01:10:53,405 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:53,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:53,405 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-09-15 01:10:53,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:53,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59415720] [2020-09-15 01:10:53,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:53,493 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 01:10:53,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59415720] [2020-09-15 01:10:53,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514379590] [2020-09-15 01:10:53,494 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 01:10:53,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 01:10:53,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:53,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:10:53,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:53,566 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 01:10:53,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:53,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 01:10:53,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143034126] [2020-09-15 01:10:53,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:10:53,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:53,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:10:53,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:10:53,569 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-09-15 01:10:53,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:53,915 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-09-15 01:10:53,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:10:53,916 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-15 01:10:53,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:53,917 INFO L225 Difference]: With dead ends: 96 [2020-09-15 01:10:53,918 INFO L226 Difference]: Without dead ends: 90 [2020-09-15 01:10:53,918 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 01:10:53,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-15 01:10:53,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-09-15 01:10:53,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 01:10:53,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-09-15 01:10:53,922 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-09-15 01:10:53,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:53,922 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-09-15 01:10:53,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:10:53,922 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-09-15 01:10:53,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:10:53,923 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:53,923 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:54,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-15 01:10:54,124 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:54,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:54,125 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-09-15 01:10:54,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:54,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889591144] [2020-09-15 01:10:54,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:54,242 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 01:10:54,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889591144] [2020-09-15 01:10:54,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740821884] [2020-09-15 01:10:54,243 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 01:10:54,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:10:54,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:54,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:10:54,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:54,339 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:54,352 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 01:10:54,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:54,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-15 01:10:54,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207827541] [2020-09-15 01:10:54,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:10:54,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:54,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:10:54,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:10:54,355 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-09-15 01:10:54,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:54,847 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-09-15 01:10:54,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:10:54,848 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 01:10:54,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:54,849 INFO L225 Difference]: With dead ends: 77 [2020-09-15 01:10:54,849 INFO L226 Difference]: Without dead ends: 69 [2020-09-15 01:10:54,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:10:54,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-15 01:10:54,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-15 01:10:54,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-15 01:10:54,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-09-15 01:10:54,854 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-09-15 01:10:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:54,854 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-09-15 01:10:54,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:10:54,854 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-09-15 01:10:54,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:10:54,855 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:54,855 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:55,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-15 01:10:55,064 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:55,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:55,065 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-09-15 01:10:55,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:55,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008796325] [2020-09-15 01:10:55,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:55,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:55,215 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 01:10:55,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008796325] [2020-09-15 01:10:55,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001609656] [2020-09-15 01:10:55,216 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 01:10:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:55,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:10:55,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:55,287 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 01:10:55,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:55,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 01:10:55,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562336837] [2020-09-15 01:10:55,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:10:55,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:55,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:10:55,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:10:55,289 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-09-15 01:10:55,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:55,499 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-15 01:10:55,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:10:55,500 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-15 01:10:55,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:55,501 INFO L225 Difference]: With dead ends: 84 [2020-09-15 01:10:55,501 INFO L226 Difference]: Without dead ends: 78 [2020-09-15 01:10:55,502 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 01:10:55,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-15 01:10:55,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-15 01:10:55,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-15 01:10:55,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-15 01:10:55,505 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-15 01:10:55,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:55,506 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-15 01:10:55,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:10:55,506 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-15 01:10:55,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:10:55,506 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:55,507 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:55,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-15 01:10:55,712 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:55,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:55,712 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-09-15 01:10:55,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:55,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693125781] [2020-09-15 01:10:55,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:55,850 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 01:10:55,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693125781] [2020-09-15 01:10:55,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470810880] [2020-09-15 01:10:55,851 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 01:10:55,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:10:55,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:55,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:10:55,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:55,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:55,960 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 01:10:55,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:55,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-15 01:10:55,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379558871] [2020-09-15 01:10:55,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:10:55,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:55,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:10:55,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:10:55,962 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-15 01:10:56,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:56,242 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-15 01:10:56,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:10:56,242 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 01:10:56,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:56,243 INFO L225 Difference]: With dead ends: 81 [2020-09-15 01:10:56,244 INFO L226 Difference]: Without dead ends: 75 [2020-09-15 01:10:56,244 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 01:10:56,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-15 01:10:56,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-09-15 01:10:56,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-15 01:10:56,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-15 01:10:56,247 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-15 01:10:56,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:56,248 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-15 01:10:56,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:10:56,248 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-15 01:10:56,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:10:56,248 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:56,249 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:56,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-15 01:10:56,454 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:56,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:56,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-09-15 01:10:56,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:56,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857944118] [2020-09-15 01:10:56,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:56,581 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 01:10:56,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857944118] [2020-09-15 01:10:56,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112476524] [2020-09-15 01:10:56,582 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 01:10:56,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-15 01:10:56,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:56,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:10:56,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:56,660 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 01:10:56,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:56,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 01:10:56,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694824084] [2020-09-15 01:10:56,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:10:56,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:56,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:10:56,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:10:56,661 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-15 01:10:56,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:56,987 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-15 01:10:56,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:10:56,988 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-15 01:10:56,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:56,989 INFO L225 Difference]: With dead ends: 78 [2020-09-15 01:10:56,989 INFO L226 Difference]: Without dead ends: 72 [2020-09-15 01:10:56,989 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 01:10:56,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-15 01:10:56,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-09-15 01:10:56,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-15 01:10:56,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-15 01:10:56,992 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-15 01:10:56,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:56,993 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-15 01:10:56,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:10:56,993 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-15 01:10:56,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:10:56,993 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:56,994 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:57,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-15 01:10:57,202 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:57,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:57,203 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-09-15 01:10:57,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:57,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388619399] [2020-09-15 01:10:57,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:57,337 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 01:10:57,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388619399] [2020-09-15 01:10:57,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533202400] [2020-09-15 01:10:57,338 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 01:10:57,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:10:57,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:57,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:10:57,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:57,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:57,431 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 01:10:57,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:57,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-15 01:10:57,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440048611] [2020-09-15 01:10:57,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:10:57,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:57,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:10:57,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:10:57,432 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-15 01:10:57,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:57,825 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-15 01:10:57,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:10:57,826 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 01:10:57,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:57,827 INFO L225 Difference]: With dead ends: 77 [2020-09-15 01:10:57,827 INFO L226 Difference]: Without dead ends: 71 [2020-09-15 01:10:57,827 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 01:10:57,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-15 01:10:57,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-09-15 01:10:57,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-15 01:10:57,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-15 01:10:57,830 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-15 01:10:57,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:57,831 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-15 01:10:57,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:10:57,831 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-15 01:10:57,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:10:57,832 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:57,832 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:58,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-15 01:10:58,041 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:58,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:58,042 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-09-15 01:10:58,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:58,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893767327] [2020-09-15 01:10:58,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:58,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:58,170 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 01:10:58,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893767327] [2020-09-15 01:10:58,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803908918] [2020-09-15 01:10:58,170 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 01:10:58,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 01:10:58,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:58,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:10:58,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:58,267 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 01:10:58,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:58,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 01:10:58,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773077170] [2020-09-15 01:10:58,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:10:58,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:58,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:10:58,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:10:58,270 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-15 01:10:58,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:58,679 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-09-15 01:10:58,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:10:58,680 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-15 01:10:58,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:58,681 INFO L225 Difference]: With dead ends: 74 [2020-09-15 01:10:58,681 INFO L226 Difference]: Without dead ends: 68 [2020-09-15 01:10:58,682 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 01:10:58,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-15 01:10:58,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-09-15 01:10:58,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-15 01:10:58,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-15 01:10:58,687 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-15 01:10:58,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:58,690 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-15 01:10:58,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:10:58,691 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-15 01:10:58,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:10:58,696 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:58,696 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:58,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:58,908 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:58,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:58,909 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-09-15 01:10:58,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:58,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103779305] [2020-09-15 01:10:58,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:59,015 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 01:10:59,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103779305] [2020-09-15 01:10:59,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924400142] [2020-09-15 01:10:59,016 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 01:10:59,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:10:59,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:59,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:10:59,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:59,101 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:59,120 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 01:10:59,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:59,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-15 01:10:59,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677052481] [2020-09-15 01:10:59,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:10:59,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:59,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:10:59,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:10:59,122 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-15 01:10:59,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:59,617 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-09-15 01:10:59,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:10:59,618 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 01:10:59,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:59,619 INFO L225 Difference]: With dead ends: 73 [2020-09-15 01:10:59,619 INFO L226 Difference]: Without dead ends: 67 [2020-09-15 01:10:59,620 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 01:10:59,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-15 01:10:59,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-09-15 01:10:59,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-15 01:10:59,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-15 01:10:59,623 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-15 01:10:59,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:59,623 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-15 01:10:59,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:10:59,624 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-15 01:10:59,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:10:59,624 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:59,624 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:59,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-15 01:10:59,834 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:59,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:59,836 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-09-15 01:10:59,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:59,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555367053] [2020-09-15 01:10:59,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:59,946 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 01:10:59,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555367053] [2020-09-15 01:10:59,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879003117] [2020-09-15 01:10:59,948 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 01:11:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:00,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:11:00,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:00,038 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 01:11:00,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:00,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 01:11:00,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756160427] [2020-09-15 01:11:00,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:11:00,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:00,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:11:00,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:11:00,040 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-15 01:11:00,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:00,420 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-15 01:11:00,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:11:00,420 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-15 01:11:00,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:00,421 INFO L225 Difference]: With dead ends: 89 [2020-09-15 01:11:00,422 INFO L226 Difference]: Without dead ends: 83 [2020-09-15 01:11:00,422 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 01:11:00,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-15 01:11:00,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-15 01:11:00,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-15 01:11:00,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-09-15 01:11:00,427 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-09-15 01:11:00,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:00,427 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-09-15 01:11:00,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:11:00,427 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-09-15 01:11:00,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:11:00,428 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:00,428 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:00,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:00,640 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:00,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:00,641 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-09-15 01:11:00,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:00,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766142057] [2020-09-15 01:11:00,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:00,744 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 01:11:00,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766142057] [2020-09-15 01:11:00,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718599302] [2020-09-15 01:11:00,745 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 01:11:00,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:11:00,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:00,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:11:00,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:00,846 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 01:11:00,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:00,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-15 01:11:00,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60147912] [2020-09-15 01:11:00,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:11:00,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:00,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:11:00,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:11:00,847 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-09-15 01:11:01,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:01,301 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-09-15 01:11:01,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:11:01,301 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 01:11:01,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:01,302 INFO L225 Difference]: With dead ends: 68 [2020-09-15 01:11:01,302 INFO L226 Difference]: Without dead ends: 60 [2020-09-15 01:11:01,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:11:01,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-15 01:11:01,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-09-15 01:11:01,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-15 01:11:01,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-09-15 01:11:01,305 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-09-15 01:11:01,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:01,305 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-09-15 01:11:01,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:11:01,306 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-09-15 01:11:01,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:11:01,306 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:01,306 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:01,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-15 01:11:01,513 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:01,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:01,514 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-09-15 01:11:01,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:01,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962904758] [2020-09-15 01:11:01,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:01,634 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 01:11:01,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962904758] [2020-09-15 01:11:01,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988374816] [2020-09-15 01:11:01,635 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 01:11:01,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-15 01:11:01,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:01,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:11:01,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:01,724 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:11:01,737 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 01:11:01,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:01,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-15 01:11:01,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27979369] [2020-09-15 01:11:01,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:11:01,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:01,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:11:01,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:11:01,739 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-09-15 01:11:02,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:02,236 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-09-15 01:11:02,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:11:02,236 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 01:11:02,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:02,237 INFO L225 Difference]: With dead ends: 76 [2020-09-15 01:11:02,238 INFO L226 Difference]: Without dead ends: 71 [2020-09-15 01:11:02,238 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 01:11:02,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-15 01:11:02,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-09-15 01:11:02,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 01:11:02,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-15 01:11:02,241 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-09-15 01:11:02,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:02,241 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-15 01:11:02,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:11:02,242 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-15 01:11:02,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:11:02,243 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:02,243 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:02,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:02,453 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:02,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:02,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-09-15 01:11:02,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:02,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445566963] [2020-09-15 01:11:02,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:02,579 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 01:11:02,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445566963] [2020-09-15 01:11:02,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625628137] [2020-09-15 01:11:02,579 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 01:11:02,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:11:02,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:02,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:11:02,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:02,666 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:11:02,686 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 01:11:02,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:02,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 01:11:02,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673203244] [2020-09-15 01:11:02,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:11:02,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:02,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:11:02,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:11:02,689 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-09-15 01:11:03,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:03,191 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-09-15 01:11:03,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:11:03,191 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 01:11:03,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:03,192 INFO L225 Difference]: With dead ends: 66 [2020-09-15 01:11:03,193 INFO L226 Difference]: Without dead ends: 61 [2020-09-15 01:11:03,193 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 01:11:03,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-15 01:11:03,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-09-15 01:11:03,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 01:11:03,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-15 01:11:03,197 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-09-15 01:11:03,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:03,198 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-15 01:11:03,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:11:03,198 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-15 01:11:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:11:03,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:03,198 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:03,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-15 01:11:03,400 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:03,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:03,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-09-15 01:11:03,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:03,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510311825] [2020-09-15 01:11:03,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:03,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:03,552 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 01:11:03,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510311825] [2020-09-15 01:11:03,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527244690] [2020-09-15 01:11:03,553 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 01:11:03,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-15 01:11:03,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:03,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:11:03,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:03,623 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 01:11:03,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:03,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 01:11:03,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018217111] [2020-09-15 01:11:03,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:11:03,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:03,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:11:03,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:11:03,625 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-09-15 01:11:03,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:03,849 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-09-15 01:11:03,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:11:03,849 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-15 01:11:03,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:03,850 INFO L225 Difference]: With dead ends: 72 [2020-09-15 01:11:03,850 INFO L226 Difference]: Without dead ends: 66 [2020-09-15 01:11:03,851 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 01:11:03,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-15 01:11:03,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-15 01:11:03,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-15 01:11:03,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-15 01:11:03,854 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-09-15 01:11:03,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:03,854 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-15 01:11:03,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:11:03,855 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-15 01:11:03,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:11:03,855 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:03,855 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:04,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-15 01:11:04,065 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:04,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:04,065 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-09-15 01:11:04,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:04,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813928762] [2020-09-15 01:11:04,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:04,233 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 01:11:04,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813928762] [2020-09-15 01:11:04,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171189569] [2020-09-15 01:11:04,234 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 01:11:04,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-15 01:11:04,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:04,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:11:04,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:04,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:11:04,375 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 01:11:04,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:04,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 01:11:04,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865526740] [2020-09-15 01:11:04,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:11:04,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:04,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:11:04,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:11:04,378 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-09-15 01:11:04,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:04,682 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-09-15 01:11:04,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:11:04,683 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 01:11:04,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:04,684 INFO L225 Difference]: With dead ends: 82 [2020-09-15 01:11:04,684 INFO L226 Difference]: Without dead ends: 76 [2020-09-15 01:11:04,684 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 01:11:04,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-15 01:11:04,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-15 01:11:04,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-15 01:11:04,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-09-15 01:11:04,687 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-09-15 01:11:04,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:04,687 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-09-15 01:11:04,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:11:04,687 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-09-15 01:11:04,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:11:04,688 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:04,688 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:04,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-15 01:11:04,896 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:04,897 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-09-15 01:11:04,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:04,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169016196] [2020-09-15 01:11:04,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:04,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:05,044 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 01:11:05,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169016196] [2020-09-15 01:11:05,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861210687] [2020-09-15 01:11:05,045 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 01:11:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:05,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:11:05,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:05,114 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 01:11:05,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:05,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 01:11:05,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504445567] [2020-09-15 01:11:05,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:11:05,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:05,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:11:05,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:11:05,116 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-09-15 01:11:05,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:05,442 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-09-15 01:11:05,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:11:05,443 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-15 01:11:05,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:05,444 INFO L225 Difference]: With dead ends: 83 [2020-09-15 01:11:05,444 INFO L226 Difference]: Without dead ends: 77 [2020-09-15 01:11:05,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:11:05,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-15 01:11:05,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-09-15 01:11:05,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-15 01:11:05,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-09-15 01:11:05,447 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-09-15 01:11:05,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:05,447 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-09-15 01:11:05,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:11:05,447 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-09-15 01:11:05,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:11:05,448 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:05,448 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:05,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-15 01:11:05,649 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:05,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:05,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-09-15 01:11:05,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:05,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643865441] [2020-09-15 01:11:05,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:05,812 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 01:11:05,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643865441] [2020-09-15 01:11:05,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588414998] [2020-09-15 01:11:05,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:11:05,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:11:05,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:05,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:11:05,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:05,884 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:11:05,904 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 01:11:05,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:05,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 01:11:05,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291088028] [2020-09-15 01:11:05,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:11:05,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:05,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:11:05,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:11:05,906 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-09-15 01:11:06,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:06,274 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-09-15 01:11:06,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:11:06,275 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 01:11:06,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:06,276 INFO L225 Difference]: With dead ends: 89 [2020-09-15 01:11:06,276 INFO L226 Difference]: Without dead ends: 83 [2020-09-15 01:11:06,277 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 01:11:06,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-15 01:11:06,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-09-15 01:11:06,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-15 01:11:06,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-09-15 01:11:06,280 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-09-15 01:11:06,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:06,280 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-09-15 01:11:06,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:11:06,280 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-09-15 01:11:06,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:11:06,281 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:06,281 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:06,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:06,489 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:06,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:06,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-09-15 01:11:06,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:06,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347106751] [2020-09-15 01:11:06,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:06,617 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 01:11:06,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347106751] [2020-09-15 01:11:06,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018351150] [2020-09-15 01:11:06,618 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 01:11:06,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-15 01:11:06,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:06,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:11:06,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:06,710 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 01:11:06,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:06,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 01:11:06,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066529574] [2020-09-15 01:11:06,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:11:06,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:06,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:11:06,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:11:06,712 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-09-15 01:11:07,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:07,093 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-09-15 01:11:07,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:11:07,094 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-15 01:11:07,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:07,094 INFO L225 Difference]: With dead ends: 89 [2020-09-15 01:11:07,095 INFO L226 Difference]: Without dead ends: 83 [2020-09-15 01:11:07,095 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 01:11:07,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-15 01:11:07,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-09-15 01:11:07,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-15 01:11:07,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-15 01:11:07,098 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-09-15 01:11:07,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:07,098 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-15 01:11:07,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:11:07,098 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-15 01:11:07,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:11:07,099 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:07,099 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:07,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:07,307 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:07,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:07,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-09-15 01:11:07,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:07,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973365595] [2020-09-15 01:11:07,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:07,475 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 01:11:07,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973365595] [2020-09-15 01:11:07,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009960458] [2020-09-15 01:11:07,476 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 01:11:07,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:11:07,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:07,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:11:07,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:07,559 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:11:07,575 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 01:11:07,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:07,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 01:11:07,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78944457] [2020-09-15 01:11:07,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:11:07,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:07,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:11:07,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:11:07,577 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-09-15 01:11:08,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:08,048 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-09-15 01:11:08,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:11:08,049 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 01:11:08,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:08,050 INFO L225 Difference]: With dead ends: 86 [2020-09-15 01:11:08,050 INFO L226 Difference]: Without dead ends: 80 [2020-09-15 01:11:08,051 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 01:11:08,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-15 01:11:08,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-09-15 01:11:08,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-15 01:11:08,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-15 01:11:08,053 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-09-15 01:11:08,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:08,054 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-15 01:11:08,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:11:08,054 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-15 01:11:08,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:11:08,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:08,055 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:08,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-15 01:11:08,256 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:08,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:08,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-09-15 01:11:08,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:08,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490832560] [2020-09-15 01:11:08,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:08,386 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 01:11:08,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490832560] [2020-09-15 01:11:08,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508583189] [2020-09-15 01:11:08,387 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 01:11:08,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-15 01:11:08,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:08,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:11:08,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:08,463 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 01:11:08,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:08,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 01:11:08,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843712324] [2020-09-15 01:11:08,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:11:08,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:08,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:11:08,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:11:08,466 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-09-15 01:11:08,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:08,888 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-09-15 01:11:08,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:11:08,889 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-15 01:11:08,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:08,890 INFO L225 Difference]: With dead ends: 87 [2020-09-15 01:11:08,890 INFO L226 Difference]: Without dead ends: 81 [2020-09-15 01:11:08,890 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 01:11:08,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-15 01:11:08,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-09-15 01:11:08,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-15 01:11:08,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-09-15 01:11:08,895 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-09-15 01:11:08,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:08,895 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-09-15 01:11:08,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:11:08,896 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-09-15 01:11:08,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:11:08,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:08,896 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:09,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:09,106 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:09,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:09,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-09-15 01:11:09,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:09,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370410270] [2020-09-15 01:11:09,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:09,238 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 01:11:09,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370410270] [2020-09-15 01:11:09,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623819726] [2020-09-15 01:11:09,239 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 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 01:11:09,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-15 01:11:09,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:09,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:11:09,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:09,323 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:11:09,336 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 01:11:09,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:09,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 01:11:09,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104808369] [2020-09-15 01:11:09,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:11:09,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:09,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:11:09,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:11:09,337 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-09-15 01:11:09,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:09,894 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-09-15 01:11:09,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:11:09,894 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 01:11:09,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:09,896 INFO L225 Difference]: With dead ends: 84 [2020-09-15 01:11:09,896 INFO L226 Difference]: Without dead ends: 78 [2020-09-15 01:11:09,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:11:09,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-15 01:11:09,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-09-15 01:11:09,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 01:11:09,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-15 01:11:09,899 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-09-15 01:11:09,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:09,900 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-15 01:11:09,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:11:09,900 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-15 01:11:09,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:11:09,900 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:09,901 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:10,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-15 01:11:10,110 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:10,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:10,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-09-15 01:11:10,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:10,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449460995] [2020-09-15 01:11:10,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:10,224 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 01:11:10,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449460995] [2020-09-15 01:11:10,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471129235] [2020-09-15 01:11:10,225 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 01:11:10,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:10,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:11:10,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:10,295 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 01:11:10,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:10,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 01:11:10,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563046196] [2020-09-15 01:11:10,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:11:10,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:10,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:11:10,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:11:10,298 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-09-15 01:11:10,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:10,777 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-15 01:11:10,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:11:10,778 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-15 01:11:10,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:10,779 INFO L225 Difference]: With dead ends: 104 [2020-09-15 01:11:10,779 INFO L226 Difference]: Without dead ends: 98 [2020-09-15 01:11:10,779 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 01:11:10,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-15 01:11:10,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-09-15 01:11:10,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-15 01:11:10,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-09-15 01:11:10,782 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-09-15 01:11:10,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:10,782 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-09-15 01:11:10,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:11:10,782 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-09-15 01:11:10,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:11:10,783 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:10,783 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:10,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-15 01:11:10,986 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:10,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:10,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-09-15 01:11:10,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:10,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378772283] [2020-09-15 01:11:10,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:11,115 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 01:11:11,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378772283] [2020-09-15 01:11:11,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723821944] [2020-09-15 01:11:11,116 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 01:11:11,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:11:11,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:11,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:11:11,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:11,200 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:11:11,218 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 01:11:11,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:11,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 01:11:11,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569289269] [2020-09-15 01:11:11,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:11:11,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:11,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:11:11,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:11:11,220 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-09-15 01:11:11,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:11,846 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-09-15 01:11:11,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:11:11,847 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 01:11:11,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:11,847 INFO L225 Difference]: With dead ends: 85 [2020-09-15 01:11:11,847 INFO L226 Difference]: Without dead ends: 77 [2020-09-15 01:11:11,848 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 01:11:11,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-15 01:11:11,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-09-15 01:11:11,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-15 01:11:11,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-09-15 01:11:11,851 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-09-15 01:11:11,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:11,851 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-09-15 01:11:11,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:11:11,851 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-09-15 01:11:11,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:11:11,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:11,852 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:12,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-15 01:11:12,059 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:12,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:12,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-09-15 01:11:12,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:12,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567818596] [2020-09-15 01:11:12,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:12,281 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 01:11:12,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567818596] [2020-09-15 01:11:12,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615734851] [2020-09-15 01:11:12,282 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 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 01:11:12,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-15 01:11:12,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:12,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:11:12,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:12,385 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 01:11:12,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:12,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 01:11:12,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900614266] [2020-09-15 01:11:12,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:11:12,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:12,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:11:12,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:11:12,387 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-09-15 01:11:12,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:12,684 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-15 01:11:12,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:11:12,685 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-15 01:11:12,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:12,685 INFO L225 Difference]: With dead ends: 94 [2020-09-15 01:11:12,686 INFO L226 Difference]: Without dead ends: 88 [2020-09-15 01:11:12,686 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 01:11:12,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-15 01:11:12,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-09-15 01:11:12,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 01:11:12,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-15 01:11:12,689 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-15 01:11:12,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:12,689 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-15 01:11:12,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:11:12,690 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-15 01:11:12,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:11:12,690 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:12,690 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:12,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-15 01:11:12,891 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:12,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:12,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-09-15 01:11:12,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:12,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320177033] [2020-09-15 01:11:12,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:13,078 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 01:11:13,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320177033] [2020-09-15 01:11:13,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389892286] [2020-09-15 01:11:13,079 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 01:11:13,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:11:13,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:13,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:11:13,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:13,156 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:11:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:13,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:13,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 01:11:13,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661898136] [2020-09-15 01:11:13,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:11:13,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:13,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:11:13,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:11:13,171 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-15 01:11:13,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:13,562 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-09-15 01:11:13,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:11:13,563 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 01:11:13,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:13,564 INFO L225 Difference]: With dead ends: 91 [2020-09-15 01:11:13,564 INFO L226 Difference]: Without dead ends: 85 [2020-09-15 01:11:13,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:11:13,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-15 01:11:13,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-15 01:11:13,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:11:13,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-15 01:11:13,566 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-15 01:11:13,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:13,566 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-15 01:11:13,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:11:13,567 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-15 01:11:13,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:11:13,567 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:13,567 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:13,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-15 01:11:13,774 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:13,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:13,775 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-09-15 01:11:13,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:13,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476647221] [2020-09-15 01:11:13,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:13,919 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 01:11:13,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476647221] [2020-09-15 01:11:13,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063084378] [2020-09-15 01:11:13,920 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 01:11:13,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-15 01:11:13,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:13,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:11:13,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:13,997 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 01:11:13,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:13,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 01:11:13,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562977796] [2020-09-15 01:11:13,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:11:13,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:13,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:11:13,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:11:13,999 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-15 01:11:14,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:14,372 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-15 01:11:14,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:11:14,373 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-15 01:11:14,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:14,374 INFO L225 Difference]: With dead ends: 88 [2020-09-15 01:11:14,374 INFO L226 Difference]: Without dead ends: 82 [2020-09-15 01:11:14,375 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 01:11:14,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-15 01:11:14,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-09-15 01:11:14,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 01:11:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-15 01:11:14,377 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-15 01:11:14,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:14,377 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-15 01:11:14,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:11:14,377 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-15 01:11:14,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:11:14,377 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:14,378 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:14,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:14,579 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:14,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:14,579 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-09-15 01:11:14,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:14,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538596594] [2020-09-15 01:11:14,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:14,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:14,732 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 01:11:14,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538596594] [2020-09-15 01:11:14,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700886142] [2020-09-15 01:11:14,733 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 01:11:14,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-15 01:11:14,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:14,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:11:14,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:14,842 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:11:14,862 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 01:11:14,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:14,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 01:11:14,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352686592] [2020-09-15 01:11:14,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:11:14,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:14,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:11:14,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:11:14,864 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-15 01:11:15,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:15,368 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-09-15 01:11:15,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:11:15,368 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 01:11:15,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:15,369 INFO L225 Difference]: With dead ends: 87 [2020-09-15 01:11:15,369 INFO L226 Difference]: Without dead ends: 81 [2020-09-15 01:11:15,370 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 01:11:15,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-15 01:11:15,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-09-15 01:11:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:11:15,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-15 01:11:15,372 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-15 01:11:15,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:15,372 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-15 01:11:15,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:11:15,372 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-15 01:11:15,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:11:15,372 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:15,372 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:15,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:15,573 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:15,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:15,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-09-15 01:11:15,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:15,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049561801] [2020-09-15 01:11:15,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:15,722 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 01:11:15,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049561801] [2020-09-15 01:11:15,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040800934] [2020-09-15 01:11:15,723 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 01:11:15,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:15,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:11:15,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:15,810 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 01:11:15,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:15,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 01:11:15,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269500839] [2020-09-15 01:11:15,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:11:15,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:15,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:11:15,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:11:15,812 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-15 01:11:16,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:16,231 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-15 01:11:16,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:11:16,231 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-15 01:11:16,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:16,232 INFO L225 Difference]: With dead ends: 84 [2020-09-15 01:11:16,232 INFO L226 Difference]: Without dead ends: 78 [2020-09-15 01:11:16,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:11:16,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-15 01:11:16,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-09-15 01:11:16,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 01:11:16,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-15 01:11:16,235 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-15 01:11:16,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:16,235 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-15 01:11:16,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:11:16,235 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-15 01:11:16,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:11:16,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:16,236 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:16,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-09-15 01:11:16,438 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:16,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:16,439 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-09-15 01:11:16,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:16,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957120887] [2020-09-15 01:11:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:16,604 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 01:11:16,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957120887] [2020-09-15 01:11:16,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683170592] [2020-09-15 01:11:16,604 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 01:11:16,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:11:16,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:16,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:11:16,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:16,679 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:11:16,697 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 01:11:16,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:16,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 01:11:16,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19728459] [2020-09-15 01:11:16,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:11:16,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:16,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:11:16,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:11:16,699 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-15 01:11:17,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:17,275 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-15 01:11:17,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:11:17,276 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 01:11:17,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:17,277 INFO L225 Difference]: With dead ends: 83 [2020-09-15 01:11:17,277 INFO L226 Difference]: Without dead ends: 77 [2020-09-15 01:11:17,278 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 01:11:17,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-15 01:11:17,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-09-15 01:11:17,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:11:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-15 01:11:17,281 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-15 01:11:17,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:17,281 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-15 01:11:17,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:11:17,282 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-15 01:11:17,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:11:17,282 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:17,282 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:17,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:17,484 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:17,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:17,485 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-09-15 01:11:17,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:17,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656388521] [2020-09-15 01:11:17,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:17,640 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 01:11:17,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656388521] [2020-09-15 01:11:17,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212706322] [2020-09-15 01:11:17,641 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 01:11:17,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-15 01:11:17,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:17,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:11:17,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:17,726 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 01:11:17,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:17,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 01:11:17,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294804530] [2020-09-15 01:11:17,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:11:17,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:17,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:11:17,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:11:17,728 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-15 01:11:18,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:18,207 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-09-15 01:11:18,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:11:18,208 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-15 01:11:18,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:18,209 INFO L225 Difference]: With dead ends: 80 [2020-09-15 01:11:18,209 INFO L226 Difference]: Without dead ends: 74 [2020-09-15 01:11:18,209 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 01:11:18,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-15 01:11:18,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-09-15 01:11:18,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 01:11:18,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-15 01:11:18,212 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-15 01:11:18,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:18,212 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-15 01:11:18,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:11:18,213 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-15 01:11:18,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:11:18,213 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:18,213 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:18,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-15 01:11:18,414 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:18,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:18,415 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-09-15 01:11:18,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:18,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691371205] [2020-09-15 01:11:18,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:18,567 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 01:11:18,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691371205] [2020-09-15 01:11:18,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077705952] [2020-09-15 01:11:18,568 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 01:11:18,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:11:18,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:18,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:11:18,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:18,660 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:11:18,676 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 01:11:18,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:18,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 01:11:18,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242569123] [2020-09-15 01:11:18,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:11:18,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:18,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:11:18,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:11:18,678 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-15 01:11:19,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:19,343 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-09-15 01:11:19,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:11:19,343 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 01:11:19,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:19,344 INFO L225 Difference]: With dead ends: 79 [2020-09-15 01:11:19,344 INFO L226 Difference]: Without dead ends: 73 [2020-09-15 01:11:19,345 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 01:11:19,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-15 01:11:19,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-09-15 01:11:19,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:11:19,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-15 01:11:19,347 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-15 01:11:19,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:19,347 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-15 01:11:19,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:11:19,348 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-15 01:11:19,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:11:19,348 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:19,348 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:19,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:19,549 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:19,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:19,550 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-09-15 01:11:19,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:19,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833543663] [2020-09-15 01:11:19,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:19,685 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 01:11:19,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833543663] [2020-09-15 01:11:19,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476874109] [2020-09-15 01:11:19,686 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 01:11:19,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-15 01:11:19,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:19,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:11:19,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:19,764 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 01:11:19,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:19,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 01:11:19,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693673675] [2020-09-15 01:11:19,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:11:19,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:19,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:11:19,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:11:19,767 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-15 01:11:20,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:20,297 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-15 01:11:20,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:11:20,298 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-15 01:11:20,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:20,299 INFO L225 Difference]: With dead ends: 95 [2020-09-15 01:11:20,299 INFO L226 Difference]: Without dead ends: 89 [2020-09-15 01:11:20,299 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 01:11:20,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-15 01:11:20,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-09-15 01:11:20,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-15 01:11:20,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-09-15 01:11:20,302 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-09-15 01:11:20,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:20,302 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-09-15 01:11:20,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:11:20,303 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-09-15 01:11:20,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:11:20,304 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:20,304 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:20,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-15 01:11:20,511 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:20,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:20,511 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-09-15 01:11:20,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:20,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643915583] [2020-09-15 01:11:20,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:20,630 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 01:11:20,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643915583] [2020-09-15 01:11:20,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843421580] [2020-09-15 01:11:20,630 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 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 01:11:20,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-15 01:11:20,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:20,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:11:20,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:20,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:11:20,733 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 01:11:20,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:20,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 01:11:20,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367094040] [2020-09-15 01:11:20,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:11:20,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:20,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:11:20,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:11:20,735 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-09-15 01:11:21,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:21,446 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-09-15 01:11:21,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:11:21,447 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 01:11:21,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:21,448 INFO L225 Difference]: With dead ends: 76 [2020-09-15 01:11:21,448 INFO L226 Difference]: Without dead ends: 68 [2020-09-15 01:11:21,449 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 01:11:21,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-15 01:11:21,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-09-15 01:11:21,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-15 01:11:21,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-09-15 01:11:21,451 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-09-15 01:11:21,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:21,452 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-09-15 01:11:21,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:11:21,452 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-09-15 01:11:21,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:11:21,452 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:21,452 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:21,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:21,653 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:21,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:21,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-09-15 01:11:21,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:21,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126968413] [2020-09-15 01:11:21,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:21,797 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 01:11:21,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126968413] [2020-09-15 01:11:21,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546167163] [2020-09-15 01:11:21,798 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 01:11:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:21,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:11:21,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:21,878 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:11:21,894 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 01:11:21,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:21,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 01:11:21,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417893220] [2020-09-15 01:11:21,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:11:21,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:21,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:11:21,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:11:21,897 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-09-15 01:11:22,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:22,559 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-09-15 01:11:22,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:11:22,559 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 01:11:22,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:22,560 INFO L225 Difference]: With dead ends: 84 [2020-09-15 01:11:22,561 INFO L226 Difference]: Without dead ends: 79 [2020-09-15 01:11:22,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:11:22,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-15 01:11:22,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-09-15 01:11:22,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-15 01:11:22,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-15 01:11:22,563 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-09-15 01:11:22,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:22,564 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-15 01:11:22,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:11:22,564 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-15 01:11:22,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:11:22,564 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:22,564 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:22,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-15 01:11:22,766 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:22,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:22,767 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-09-15 01:11:22,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:22,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655968549] [2020-09-15 01:11:22,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:22,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655968549] [2020-09-15 01:11:22,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839847025] [2020-09-15 01:11:22,890 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 01:11:22,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:11:22,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:22,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:11:22,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:22,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-15 01:11:22,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-09-15 01:11:22,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837152632] [2020-09-15 01:11:22,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 01:11:22,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:22,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 01:11:22,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:11:22,974 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 8 states. [2020-09-15 01:11:22,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:22,992 INFO L93 Difference]: Finished difference Result 151 states and 338 transitions. [2020-09-15 01:11:22,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 01:11:22,993 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-09-15 01:11:22,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:22,994 INFO L225 Difference]: With dead ends: 151 [2020-09-15 01:11:22,994 INFO L226 Difference]: Without dead ends: 50 [2020-09-15 01:11:22,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:11:22,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-15 01:11:22,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-09-15 01:11:22,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 01:11:22,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 100 transitions. [2020-09-15 01:11:22,998 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 100 transitions. Word has length 19 [2020-09-15 01:11:22,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:22,998 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 100 transitions. [2020-09-15 01:11:22,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 01:11:22,998 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 100 transitions. [2020-09-15 01:11:22,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:11:22,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:22,999 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:23,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-15 01:11:23,209 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:23,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:23,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-09-15 01:11:23,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:23,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068535816] [2020-09-15 01:11:23,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:23,283 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:23,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068535816] [2020-09-15 01:11:23,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254868057] [2020-09-15 01:11:23,284 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 01:11:23,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-15 01:11:23,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:23,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:11:23,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:23,379 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:23,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-15 01:11:23,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-09-15 01:11:23,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47092627] [2020-09-15 01:11:23,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 01:11:23,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:23,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 01:11:23,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:11:23,381 INFO L87 Difference]: Start difference. First operand 50 states and 100 transitions. Second operand 8 states. [2020-09-15 01:11:23,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:23,401 INFO L93 Difference]: Finished difference Result 86 states and 150 transitions. [2020-09-15 01:11:23,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 01:11:23,402 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-09-15 01:11:23,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:23,403 INFO L225 Difference]: With dead ends: 86 [2020-09-15 01:11:23,403 INFO L226 Difference]: Without dead ends: 0 [2020-09-15 01:11:23,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:11:23,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-15 01:11:23,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-15 01:11:23,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-15 01:11:23,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-15 01:11:23,404 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-09-15 01:11:23,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:23,405 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-15 01:11:23,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 01:11:23,405 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-15 01:11:23,405 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-15 01:11:23,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:23,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.09 01:11:23 BasicIcfg [2020-09-15 01:11:23,620 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-15 01:11:23,623 INFO L168 Benchmark]: Toolchain (without parser) took 55952.90 ms. Allocated memory was 143.7 MB in the beginning and 429.4 MB in the end (delta: 285.7 MB). Free memory was 104.1 MB in the beginning and 368.8 MB in the end (delta: -264.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. [2020-09-15 01:11:23,624 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 143.7 MB. Free memory was 123.9 MB in the beginning and 123.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-15 01:11:23,624 INFO L168 Benchmark]: CACSL2BoogieTranslator took 864.24 ms. Allocated memory was 143.7 MB in the beginning and 206.6 MB in the end (delta: 62.9 MB). Free memory was 103.4 MB in the beginning and 166.7 MB in the end (delta: -63.2 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. [2020-09-15 01:11:23,625 INFO L168 Benchmark]: Boogie Procedure Inliner took 94.70 ms. Allocated memory is still 206.6 MB. Free memory was 166.7 MB in the beginning and 164.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-09-15 01:11:23,625 INFO L168 Benchmark]: Boogie Preprocessor took 37.37 ms. Allocated memory is still 206.6 MB. Free memory was 164.8 MB in the beginning and 162.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-09-15 01:11:23,625 INFO L168 Benchmark]: RCFGBuilder took 506.03 ms. Allocated memory is still 206.6 MB. Free memory was 162.9 MB in the beginning and 143.3 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2020-09-15 01:11:23,626 INFO L168 Benchmark]: TraceAbstraction took 54437.94 ms. Allocated memory was 206.6 MB in the beginning and 429.4 MB in the end (delta: 222.8 MB). Free memory was 142.6 MB in the beginning and 368.8 MB in the end (delta: -226.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-15 01:11:23,628 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 143.7 MB. Free memory was 123.9 MB in the beginning and 123.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 864.24 ms. Allocated memory was 143.7 MB in the beginning and 206.6 MB in the end (delta: 62.9 MB). Free memory was 103.4 MB in the beginning and 166.7 MB in the end (delta: -63.2 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 94.70 ms. Allocated memory is still 206.6 MB. Free memory was 166.7 MB in the beginning and 164.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 37.37 ms. Allocated memory is still 206.6 MB. Free memory was 164.8 MB in the beginning and 162.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 506.03 ms. Allocated memory is still 206.6 MB. Free memory was 162.9 MB in the beginning and 143.3 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 54437.94 ms. Allocated memory was 206.6 MB in the beginning and 429.4 MB in the end (delta: 222.8 MB). Free memory was 142.6 MB in the beginning and 368.8 MB in the end (delta: -226.2 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.6s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 54.2s, OverallIterations: 71, TraceHistogramMax: 6, AutomataDifference: 22.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 1137 SDtfs, 2971 SDslu, 4527 SDs, 0 SdLazy, 4797 SolverSat, 2174 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2326 GetRequests, 842 SyntacticMatches, 64 SemanticMatches, 1420 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6833 ImplicationChecksByTransitivity, 21.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 71 MinimizatonAttempts, 1143 StatesRemovedByMinimization, 68 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 10.0s InterpolantComputationTime, 2056 NumberOfCodeBlocks, 2056 NumberOfCodeBlocksAsserted, 254 NumberOfCheckSat, 1919 ConstructedInterpolants, 0 QuantifiedInterpolants, 117675 SizeOfPredicates, 456 NumberOfNonLiveVariables, 6614 ConjunctsInSsa, 729 ConjunctsInUnsatCore, 137 InterpolantComputations, 7 PerfectInterpolantSequences, 90/1440 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...