/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-fae578e [2019-12-18 19:33:22,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-18 19:33:22,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-18 19:33:22,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-18 19:33:22,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-18 19:33:22,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-18 19:33:22,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-18 19:33:22,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-18 19:33:22,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-18 19:33:22,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-18 19:33:22,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-18 19:33:22,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-18 19:33:22,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-18 19:33:22,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-18 19:33:22,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-18 19:33:22,370 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-18 19:33:22,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-18 19:33:22,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-18 19:33:22,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-18 19:33:22,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-18 19:33:22,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-18 19:33:22,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-18 19:33:22,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-18 19:33:22,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-18 19:33:22,391 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-12-18 19:33:22,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-18 19:33:22,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-18 19:33:22,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-18 19:33:22,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-18 19:33:22,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-18 19:33:22,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-18 19:33:22,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-18 19:33:22,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-18 19:33:22,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-18 19:33:22,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-18 19:33:22,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-18 19:33:22,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe.epf [2019-12-18 19:33:22,414 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-18 19:33:22,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-18 19:33:22,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-18 19:33:22,415 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-18 19:33:22,416 INFO L138 SettingsManager]: * Use SBE=true [2019-12-18 19:33:22,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-18 19:33:22,416 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-18 19:33:22,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-18 19:33:22,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-18 19:33:22,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-18 19:33:22,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-18 19:33:22,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-18 19:33:22,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-18 19:33:22,418 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-18 19:33:22,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-18 19:33:22,418 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-18 19:33:22,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-18 19:33:22,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-18 19:33:22,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-18 19:33:22,419 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-18 19:33:22,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-18 19:33:22,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 19:33:22,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-18 19:33:22,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-18 19:33:22,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-18 19:33:22,420 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-18 19:33:22,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-18 19:33:22,420 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2019-12-18 19:33:22,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-18 19:33:22,421 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-18 19:33:22,729 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-18 19:33:22,746 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-18 19:33:22,750 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-18 19:33:22,751 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-18 19:33:22,752 INFO L275 PluginConnector]: CDTParser initialized [2019-12-18 19:33:22,753 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-2.i [2019-12-18 19:33:22,830 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fc1f6620/e6c6905d038f4367935f4a34d3efe7df/FLAGf4f05f751 [2019-12-18 19:33:23,394 INFO L306 CDTParser]: Found 1 translation units. [2019-12-18 19:33:23,395 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i [2019-12-18 19:33:23,418 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fc1f6620/e6c6905d038f4367935f4a34d3efe7df/FLAGf4f05f751 [2019-12-18 19:33:23,756 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fc1f6620/e6c6905d038f4367935f4a34d3efe7df [2019-12-18 19:33:23,767 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-18 19:33:23,769 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-18 19:33:23,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-18 19:33:23,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-18 19:33:23,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-18 19:33:23,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:33:23" (1/1) ... [2019-12-18 19:33:23,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d0208c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:33:23, skipping insertion in model container [2019-12-18 19:33:23,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:33:23" (1/1) ... [2019-12-18 19:33:23,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-18 19:33:23,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-18 19:33:24,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 19:33:24,388 INFO L203 MainTranslator]: Completed pre-run [2019-12-18 19:33:24,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 19:33:24,531 INFO L208 MainTranslator]: Completed translation [2019-12-18 19:33:24,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:33:24 WrapperNode [2019-12-18 19:33:24,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-18 19:33:24,533 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-18 19:33:24,533 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-18 19:33:24,533 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-18 19:33:24,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:33:24" (1/1) ... [2019-12-18 19:33:24,570 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:33:24" (1/1) ... [2019-12-18 19:33:24,597 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-18 19:33:24,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-18 19:33:24,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-18 19:33:24,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-18 19:33:24,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:33:24" (1/1) ... [2019-12-18 19:33:24,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:33:24" (1/1) ... [2019-12-18 19:33:24,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:33:24" (1/1) ... [2019-12-18 19:33:24,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:33:24" (1/1) ... [2019-12-18 19:33:24,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:33:24" (1/1) ... [2019-12-18 19:33:24,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:33:24" (1/1) ... [2019-12-18 19:33:24,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:33:24" (1/1) ... [2019-12-18 19:33:24,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-18 19:33:24,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-18 19:33:24,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-18 19:33:24,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-18 19:33:24,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:33:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 19:33:24,702 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-18 19:33:24,702 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-18 19:33:24,702 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-18 19:33:24,703 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-18 19:33:24,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-18 19:33:24,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-18 19:33:24,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-18 19:33:24,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-18 19:33:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-18 19:33:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-18 19:33:24,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-18 19:33:24,705 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-18 19:33:25,066 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-18 19:33:25,066 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-18 19:33:25,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:33:25 BoogieIcfgContainer [2019-12-18 19:33:25,068 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-18 19:33:25,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-18 19:33:25,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-18 19:33:25,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-18 19:33:25,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:33:23" (1/3) ... [2019-12-18 19:33:25,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ca0b88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:33:25, skipping insertion in model container [2019-12-18 19:33:25,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:33:24" (2/3) ... [2019-12-18 19:33:25,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ca0b88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:33:25, skipping insertion in model container [2019-12-18 19:33:25,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:33:25" (3/3) ... [2019-12-18 19:33:25,079 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2019-12-18 19:33:25,090 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-18 19:33:25,090 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-18 19:33:25,097 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-18 19:33:25,099 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-18 19:33:25,124 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,125 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,125 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,125 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,126 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,126 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,127 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,127 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,127 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,127 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,128 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,128 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,129 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,129 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,129 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,130 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,130 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,130 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,130 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,131 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,131 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,131 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,132 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,132 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,132 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,132 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,133 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,133 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,133 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,133 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,137 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,138 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,138 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,139 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,139 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,139 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,145 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,145 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,145 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,146 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,146 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,146 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,162 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-18 19:33:25,181 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-18 19:33:25,182 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-18 19:33:25,182 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-18 19:33:25,182 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-18 19:33:25,182 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-18 19:33:25,182 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-18 19:33:25,183 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-18 19:33:25,183 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-18 19:33:25,196 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-18 19:33:25,199 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-18 19:33:25,240 INFO L126 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-18 19:33:25,240 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 19:33:25,249 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs. 6/51 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-18 19:33:25,255 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-18 19:33:25,276 INFO L126 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-18 19:33:25,276 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 19:33:25,278 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs. 6/51 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-18 19:33:25,280 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-18 19:33:25,281 INFO L182 etLargeBlockEncoding]: Variable Check. [2019-12-18 19:33:26,483 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-18 19:33:26,597 INFO L206 etLargeBlockEncoding]: Checked pairs total: 686 [2019-12-18 19:33:26,597 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-18 19:33:26,602 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-18 19:33:26,614 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-18 19:33:26,617 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-18 19:33:26,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-18 19:33:26,625 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:26,626 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-18 19:33:26,626 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:26,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:26,635 INFO L82 PathProgramCache]: Analyzing trace with hash 214338580, now seen corresponding path program 1 times [2019-12-18 19:33:26,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:26,647 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457757733] [2019-12-18 19:33:26,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:26,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457757733] [2019-12-18 19:33:26,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 19:33:26,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-18 19:33:26,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551917301] [2019-12-18 19:33:26,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 19:33:27,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:27,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 19:33:27,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 19:33:27,020 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-18 19:33:27,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:27,070 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-18 19:33:27,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 19:33:27,073 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-18 19:33:27,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:27,108 INFO L225 Difference]: With dead ends: 54 [2019-12-18 19:33:27,109 INFO L226 Difference]: Without dead ends: 36 [2019-12-18 19:33:27,110 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 19:33:27,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-18 19:33:27,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-18 19:33:27,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-18 19:33:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-18 19:33:27,149 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-18 19:33:27,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:27,150 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-18 19:33:27,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 19:33:27,150 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-18 19:33:27,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-18 19:33:27,151 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:27,151 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:27,151 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:27,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:27,152 INFO L82 PathProgramCache]: Analyzing trace with hash -179042095, now seen corresponding path program 1 times [2019-12-18 19:33:27,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:27,153 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706797657] [2019-12-18 19:33:27,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:27,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706797657] [2019-12-18 19:33:27,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 19:33:27,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 19:33:27,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847247211] [2019-12-18 19:33:27,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-18 19:33:27,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:27,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-18 19:33:27,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-18 19:33:27,241 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-18 19:33:27,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:27,280 INFO L93 Difference]: Finished difference Result 42 states and 90 transitions. [2019-12-18 19:33:27,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-18 19:33:27,283 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-18 19:33:27,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:27,284 INFO L225 Difference]: With dead ends: 42 [2019-12-18 19:33:27,284 INFO L226 Difference]: Without dead ends: 41 [2019-12-18 19:33:27,285 INFO L631 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 [2019-12-18 19:33:27,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-18 19:33:27,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-12-18 19:33:27,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-18 19:33:27,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 86 transitions. [2019-12-18 19:33:27,294 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 86 transitions. Word has length 7 [2019-12-18 19:33:27,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:27,294 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 86 transitions. [2019-12-18 19:33:27,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-18 19:33:27,294 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 86 transitions. [2019-12-18 19:33:27,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-18 19:33:27,295 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:27,295 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:27,296 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:27,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:27,296 INFO L82 PathProgramCache]: Analyzing trace with hash -179038096, now seen corresponding path program 1 times [2019-12-18 19:33:27,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:27,297 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895140129] [2019-12-18 19:33:27,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:27,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895140129] [2019-12-18 19:33:27,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 19:33:27,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 19:33:27,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341381140] [2019-12-18 19:33:27,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-18 19:33:27,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:27,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-18 19:33:27,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-18 19:33:27,362 INFO L87 Difference]: Start difference. First operand 39 states and 86 transitions. Second operand 4 states. [2019-12-18 19:33:27,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:27,389 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-18 19:33:27,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-18 19:33:27,390 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-18 19:33:27,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:27,391 INFO L225 Difference]: With dead ends: 51 [2019-12-18 19:33:27,391 INFO L226 Difference]: Without dead ends: 50 [2019-12-18 19:33:27,392 INFO L631 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 [2019-12-18 19:33:27,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-18 19:33:27,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-18 19:33:27,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-18 19:33:27,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-18 19:33:27,403 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-18 19:33:27,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:27,403 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-18 19:33:27,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-18 19:33:27,404 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-18 19:33:27,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-18 19:33:27,406 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:27,406 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:27,406 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:27,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:27,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1255337161, now seen corresponding path program 2 times [2019-12-18 19:33:27,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:27,407 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763341607] [2019-12-18 19:33:27,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:27,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763341607] [2019-12-18 19:33:27,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059185822] [2019-12-18 19:33:27,475 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:27,542 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:33:27,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:27,544 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 19:33:27,549 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:27,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:27,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:27,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-18 19:33:27,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698751229] [2019-12-18 19:33:27,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 19:33:27,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:27,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 19:33:27,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-18 19:33:27,601 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 8 states. [2019-12-18 19:33:27,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:27,656 INFO L93 Difference]: Finished difference Result 56 states and 118 transitions. [2019-12-18 19:33:27,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 19:33:27,656 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-18 19:33:27,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:27,658 INFO L225 Difference]: With dead ends: 56 [2019-12-18 19:33:27,658 INFO L226 Difference]: Without dead ends: 55 [2019-12-18 19:33:27,658 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-12-18 19:33:27,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-18 19:33:27,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2019-12-18 19:33:27,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-18 19:33:27,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 108 transitions. [2019-12-18 19:33:27,666 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 108 transitions. Word has length 8 [2019-12-18 19:33:27,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:27,667 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 108 transitions. [2019-12-18 19:33:27,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 19:33:27,667 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 108 transitions. [2019-12-18 19:33:27,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-18 19:33:27,668 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:27,668 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:27,873 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:27,874 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:27,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:27,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1255213037, now seen corresponding path program 2 times [2019-12-18 19:33:27,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:27,876 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078505532] [2019-12-18 19:33:27,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:27,958 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078505532] [2019-12-18 19:33:27,958 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743975593] [2019-12-18 19:33:27,958 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:28,035 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:33:28,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:28,036 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 19:33:28,037 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:28,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:28,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-18 19:33:28,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825086983] [2019-12-18 19:33:28,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 19:33:28,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:28,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 19:33:28,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-18 19:33:28,073 INFO L87 Difference]: Start difference. First operand 50 states and 108 transitions. Second operand 8 states. [2019-12-18 19:33:28,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:28,118 INFO L93 Difference]: Finished difference Result 63 states and 134 transitions. [2019-12-18 19:33:28,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 19:33:28,118 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-18 19:33:28,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:28,119 INFO L225 Difference]: With dead ends: 63 [2019-12-18 19:33:28,119 INFO L226 Difference]: Without dead ends: 62 [2019-12-18 19:33:28,120 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-12-18 19:33:28,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-18 19:33:28,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-12-18 19:33:28,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-18 19:33:28,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-18 19:33:28,127 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-18 19:33:28,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:28,128 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-18 19:33:28,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 19:33:28,128 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-18 19:33:28,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 19:33:28,129 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:28,129 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:28,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:28,330 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:28,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:28,331 INFO L82 PathProgramCache]: Analyzing trace with hash -260745839, now seen corresponding path program 3 times [2019-12-18 19:33:28,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:28,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146918060] [2019-12-18 19:33:28,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:28,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146918060] [2019-12-18 19:33:28,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344815158] [2019-12-18 19:33:28,434 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:28,481 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 19:33:28,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:28,482 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 19:33:28,484 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:28,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:28,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 19:33:28,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716135109] [2019-12-18 19:33:28,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 19:33:28,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:28,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 19:33:28,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-18 19:33:28,558 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 10 states. [2019-12-18 19:33:28,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:28,659 INFO L93 Difference]: Finished difference Result 66 states and 142 transitions. [2019-12-18 19:33:28,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 19:33:28,659 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-18 19:33:28,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:28,660 INFO L225 Difference]: With dead ends: 66 [2019-12-18 19:33:28,660 INFO L226 Difference]: Without dead ends: 65 [2019-12-18 19:33:28,661 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-12-18 19:33:28,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-18 19:33:28,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2019-12-18 19:33:28,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-18 19:33:28,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 130 transitions. [2019-12-18 19:33:28,668 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 130 transitions. Word has length 9 [2019-12-18 19:33:28,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:28,668 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 130 transitions. [2019-12-18 19:33:28,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 19:33:28,668 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 130 transitions. [2019-12-18 19:33:28,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 19:33:28,669 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:28,669 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:28,877 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:28,877 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:28,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:28,878 INFO L82 PathProgramCache]: Analyzing trace with hash -260744723, now seen corresponding path program 1 times [2019-12-18 19:33:28,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:28,878 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961288190] [2019-12-18 19:33:28,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:28,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961288190] [2019-12-18 19:33:28,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 19:33:28,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 19:33:28,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880422439] [2019-12-18 19:33:28,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 19:33:28,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:28,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 19:33:28,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-18 19:33:28,943 INFO L87 Difference]: Start difference. First operand 58 states and 130 transitions. Second operand 5 states. [2019-12-18 19:33:28,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:28,991 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-18 19:33:28,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 19:33:28,993 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 19:33:28,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:28,994 INFO L225 Difference]: With dead ends: 68 [2019-12-18 19:33:28,994 INFO L226 Difference]: Without dead ends: 67 [2019-12-18 19:33:28,995 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-18 19:33:28,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-18 19:33:29,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2019-12-18 19:33:29,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-18 19:33:29,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 131 transitions. [2019-12-18 19:33:29,004 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 131 transitions. Word has length 9 [2019-12-18 19:33:29,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:29,005 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 131 transitions. [2019-12-18 19:33:29,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 19:33:29,005 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 131 transitions. [2019-12-18 19:33:29,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 19:33:29,006 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:29,006 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:29,007 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:29,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:29,007 INFO L82 PathProgramCache]: Analyzing trace with hash -260711243, now seen corresponding path program 2 times [2019-12-18 19:33:29,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:29,008 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371704166] [2019-12-18 19:33:29,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:29,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:29,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371704166] [2019-12-18 19:33:29,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 19:33:29,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 19:33:29,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972062353] [2019-12-18 19:33:29,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 19:33:29,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:29,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 19:33:29,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-18 19:33:29,089 INFO L87 Difference]: Start difference. First operand 59 states and 131 transitions. Second operand 5 states. [2019-12-18 19:33:29,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:29,142 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-18 19:33:29,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 19:33:29,142 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 19:33:29,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:29,143 INFO L225 Difference]: With dead ends: 68 [2019-12-18 19:33:29,143 INFO L226 Difference]: Without dead ends: 67 [2019-12-18 19:33:29,144 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-18 19:33:29,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-18 19:33:29,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2019-12-18 19:33:29,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-18 19:33:29,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 134 transitions. [2019-12-18 19:33:29,152 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 134 transitions. Word has length 9 [2019-12-18 19:33:29,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:29,152 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 134 transitions. [2019-12-18 19:33:29,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 19:33:29,152 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 134 transitions. [2019-12-18 19:33:29,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 19:33:29,153 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:29,153 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:29,153 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:29,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:29,154 INFO L82 PathProgramCache]: Analyzing trace with hash -256897840, now seen corresponding path program 3 times [2019-12-18 19:33:29,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:29,154 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903403544] [2019-12-18 19:33:29,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:29,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:29,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903403544] [2019-12-18 19:33:29,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216954771] [2019-12-18 19:33:29,231 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:29,274 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 19:33:29,274 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:29,275 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 19:33:29,276 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:29,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:29,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:29,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 19:33:29,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009426922] [2019-12-18 19:33:29,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 19:33:29,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:29,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 19:33:29,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-18 19:33:29,328 INFO L87 Difference]: Start difference. First operand 62 states and 134 transitions. Second operand 10 states. [2019-12-18 19:33:29,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:29,434 INFO L93 Difference]: Finished difference Result 77 states and 162 transitions. [2019-12-18 19:33:29,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 19:33:29,434 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-18 19:33:29,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:29,435 INFO L225 Difference]: With dead ends: 77 [2019-12-18 19:33:29,435 INFO L226 Difference]: Without dead ends: 76 [2019-12-18 19:33:29,435 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-12-18 19:33:29,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-18 19:33:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2019-12-18 19:33:29,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-18 19:33:29,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-18 19:33:29,446 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-18 19:33:29,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:29,446 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-18 19:33:29,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 19:33:29,446 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-18 19:33:29,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 19:33:29,447 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:29,447 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:29,648 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:29,648 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:29,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:29,649 INFO L82 PathProgramCache]: Analyzing trace with hash 506814071, now seen corresponding path program 4 times [2019-12-18 19:33:29,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:29,649 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020398607] [2019-12-18 19:33:29,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:29,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020398607] [2019-12-18 19:33:29,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640755904] [2019-12-18 19:33:29,726 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:29,772 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:33:29,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:29,773 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 19:33:29,775 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:29,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:29,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 19:33:29,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397860982] [2019-12-18 19:33:29,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 19:33:29,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:29,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 19:33:29,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:33:29,901 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 12 states. [2019-12-18 19:33:30,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:30,012 INFO L93 Difference]: Finished difference Result 80 states and 170 transitions. [2019-12-18 19:33:30,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 19:33:30,017 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-18 19:33:30,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:30,018 INFO L225 Difference]: With dead ends: 80 [2019-12-18 19:33:30,018 INFO L226 Difference]: Without dead ends: 79 [2019-12-18 19:33:30,019 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:33:30,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-18 19:33:30,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2019-12-18 19:33:30,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-18 19:33:30,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-18 19:33:30,025 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-18 19:33:30,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:30,025 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-18 19:33:30,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 19:33:30,026 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-18 19:33:30,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 19:33:30,026 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:30,027 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:30,239 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:30,240 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:30,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:30,240 INFO L82 PathProgramCache]: Analyzing trace with hash 506815187, now seen corresponding path program 3 times [2019-12-18 19:33:30,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:30,241 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532566201] [2019-12-18 19:33:30,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:30,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532566201] [2019-12-18 19:33:30,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41940242] [2019-12-18 19:33:30,355 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:30,404 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 19:33:30,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:30,405 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:30,406 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:30,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:30,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:30,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 19:33:30,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007623912] [2019-12-18 19:33:30,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 19:33:30,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:30,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 19:33:30,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-18 19:33:30,460 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-18 19:33:30,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:30,532 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-18 19:33:30,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 19:33:30,532 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 19:33:30,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:30,533 INFO L225 Difference]: With dead ends: 88 [2019-12-18 19:33:30,534 INFO L226 Difference]: Without dead ends: 87 [2019-12-18 19:33:30,534 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:33:30,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-18 19:33:30,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2019-12-18 19:33:30,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-18 19:33:30,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-18 19:33:30,539 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-18 19:33:30,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:30,540 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-18 19:33:30,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 19:33:30,540 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-18 19:33:30,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 19:33:30,541 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:30,541 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:30,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:30,745 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:30,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:30,745 INFO L82 PathProgramCache]: Analyzing trace with hash 506848822, now seen corresponding path program 4 times [2019-12-18 19:33:30,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:30,746 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253809971] [2019-12-18 19:33:30,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:30,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253809971] [2019-12-18 19:33:30,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889711354] [2019-12-18 19:33:30,818 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:30,877 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:33:30,877 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:30,878 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 19:33:30,881 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:30,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:30,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 19:33:30,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329251322] [2019-12-18 19:33:30,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 19:33:30,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:30,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 19:33:30,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-18 19:33:30,938 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-18 19:33:31,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:31,019 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-18 19:33:31,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 19:33:31,019 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 19:33:31,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:31,020 INFO L225 Difference]: With dead ends: 88 [2019-12-18 19:33:31,020 INFO L226 Difference]: Without dead ends: 87 [2019-12-18 19:33:31,021 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-12-18 19:33:31,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-18 19:33:31,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2019-12-18 19:33:31,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-18 19:33:31,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-18 19:33:31,025 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-18 19:33:31,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:31,026 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-18 19:33:31,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 19:33:31,026 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-18 19:33:31,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 19:33:31,027 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:31,027 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:31,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:31,238 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:31,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:31,238 INFO L82 PathProgramCache]: Analyzing trace with hash 506848667, now seen corresponding path program 5 times [2019-12-18 19:33:31,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:31,239 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774016605] [2019-12-18 19:33:31,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:31,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:31,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774016605] [2019-12-18 19:33:31,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401159326] [2019-12-18 19:33:31,325 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:31,368 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:33:31,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:31,369 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 19:33:31,370 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:31,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:31,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:31,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 19:33:31,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783487987] [2019-12-18 19:33:31,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 19:33:31,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:31,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 19:33:31,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-18 19:33:31,436 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 10 states. [2019-12-18 19:33:31,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:31,527 INFO L93 Difference]: Finished difference Result 94 states and 194 transitions. [2019-12-18 19:33:31,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 19:33:31,528 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 19:33:31,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:31,529 INFO L225 Difference]: With dead ends: 94 [2019-12-18 19:33:31,529 INFO L226 Difference]: Without dead ends: 92 [2019-12-18 19:33:31,530 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:31,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-12-18 19:33:31,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2019-12-18 19:33:31,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-18 19:33:31,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-18 19:33:31,535 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-18 19:33:31,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:31,535 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-18 19:33:31,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 19:33:31,536 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-18 19:33:31,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 19:33:31,536 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:31,536 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:31,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:31,740 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:31,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:31,741 INFO L82 PathProgramCache]: Analyzing trace with hash 507886702, now seen corresponding path program 6 times [2019-12-18 19:33:31,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:31,742 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405518027] [2019-12-18 19:33:31,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:31,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:31,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:31,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405518027] [2019-12-18 19:33:31,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708768512] [2019-12-18 19:33:31,824 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:31,877 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 19:33:31,877 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:31,878 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 19:33:31,881 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:31,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:31,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:31,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 19:33:31,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896752053] [2019-12-18 19:33:31,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 19:33:31,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:31,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 19:33:31,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-18 19:33:31,942 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 10 states. [2019-12-18 19:33:32,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:32,079 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-18 19:33:32,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 19:33:32,080 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 19:33:32,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:32,081 INFO L225 Difference]: With dead ends: 88 [2019-12-18 19:33:32,081 INFO L226 Difference]: Without dead ends: 87 [2019-12-18 19:33:32,082 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:32,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-18 19:33:32,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2019-12-18 19:33:32,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-18 19:33:32,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-18 19:33:32,086 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-18 19:33:32,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:32,086 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-18 19:33:32,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 19:33:32,087 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-18 19:33:32,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 19:33:32,087 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:32,087 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:32,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:32,292 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:32,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:32,293 INFO L82 PathProgramCache]: Analyzing trace with hash 626102195, now seen corresponding path program 4 times [2019-12-18 19:33:32,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:32,293 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107479595] [2019-12-18 19:33:32,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:32,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:32,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107479595] [2019-12-18 19:33:32,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921826029] [2019-12-18 19:33:32,372 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:32,442 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:33:32,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:32,443 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 19:33:32,445 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:32,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:32,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:32,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 19:33:32,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968958313] [2019-12-18 19:33:32,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 19:33:32,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:32,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 19:33:32,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:33:32,545 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 12 states. [2019-12-18 19:33:32,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:32,693 INFO L93 Difference]: Finished difference Result 92 states and 194 transitions. [2019-12-18 19:33:32,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 19:33:32,694 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-18 19:33:32,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:32,695 INFO L225 Difference]: With dead ends: 92 [2019-12-18 19:33:32,695 INFO L226 Difference]: Without dead ends: 91 [2019-12-18 19:33:32,696 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:33:32,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-18 19:33:32,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2019-12-18 19:33:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-18 19:33:32,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-18 19:33:32,710 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-18 19:33:32,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:32,711 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-18 19:33:32,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 19:33:32,711 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-18 19:33:32,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 19:33:32,715 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:32,716 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:32,930 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:32,931 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:32,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:32,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1468632495, now seen corresponding path program 5 times [2019-12-18 19:33:32,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:32,932 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200795684] [2019-12-18 19:33:32,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:32,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:33,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200795684] [2019-12-18 19:33:33,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470222679] [2019-12-18 19:33:33,063 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:33,139 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:33:33,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:33,141 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:33,143 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:33,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:33,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:33,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900410688] [2019-12-18 19:33:33,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:33,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:33,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:33,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:33,290 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 14 states. [2019-12-18 19:33:33,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:33,482 INFO L93 Difference]: Finished difference Result 95 states and 202 transitions. [2019-12-18 19:33:33,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 19:33:33,483 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-18 19:33:33,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:33,484 INFO L225 Difference]: With dead ends: 95 [2019-12-18 19:33:33,484 INFO L226 Difference]: Without dead ends: 94 [2019-12-18 19:33:33,484 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2019-12-18 19:33:33,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-18 19:33:33,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2019-12-18 19:33:33,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 19:33:33,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 19:33:33,492 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 19:33:33,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:33,493 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 19:33:33,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:33,493 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 19:33:33,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 19:33:33,494 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:33,494 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:33,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:33,699 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:33,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:33,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1468631379, now seen corresponding path program 7 times [2019-12-18 19:33:33,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:33,700 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34826915] [2019-12-18 19:33:33,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:33,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:33,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34826915] [2019-12-18 19:33:33,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185607601] [2019-12-18 19:33:33,799 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:33,851 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 19:33:33,852 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:33,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:33,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:33,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 19:33:33,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829803437] [2019-12-18 19:33:33,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 19:33:33,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:33,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 19:33:33,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:33:33,922 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 19:33:34,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:34,103 INFO L93 Difference]: Finished difference Result 104 states and 220 transitions. [2019-12-18 19:33:34,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 19:33:34,104 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 19:33:34,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:34,104 INFO L225 Difference]: With dead ends: 104 [2019-12-18 19:33:34,105 INFO L226 Difference]: Without dead ends: 103 [2019-12-18 19:33:34,105 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:33:34,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-12-18 19:33:34,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2019-12-18 19:33:34,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 19:33:34,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 19:33:34,108 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 19:33:34,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:34,108 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 19:33:34,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 19:33:34,108 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 19:33:34,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 19:33:34,109 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:34,109 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:34,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:34,309 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:34,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:34,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597744, now seen corresponding path program 8 times [2019-12-18 19:33:34,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:34,311 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117919791] [2019-12-18 19:33:34,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:34,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:34,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117919791] [2019-12-18 19:33:34,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916109776] [2019-12-18 19:33:34,379 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:34,437 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:33:34,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:34,438 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 19:33:34,438 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:34,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:34,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 19:33:34,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881361106] [2019-12-18 19:33:34,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 19:33:34,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:34,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 19:33:34,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:33:34,507 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 19:33:34,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:34,706 INFO L93 Difference]: Finished difference Result 110 states and 230 transitions. [2019-12-18 19:33:34,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 19:33:34,707 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 19:33:34,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:34,707 INFO L225 Difference]: With dead ends: 110 [2019-12-18 19:33:34,708 INFO L226 Difference]: Without dead ends: 108 [2019-12-18 19:33:34,708 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:33:34,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-18 19:33:34,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 84. [2019-12-18 19:33:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-18 19:33:34,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-18 19:33:34,715 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-18 19:33:34,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:34,715 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-18 19:33:34,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 19:33:34,716 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-18 19:33:34,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 19:33:34,716 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:34,716 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:34,919 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:34,920 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:34,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:34,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597899, now seen corresponding path program 9 times [2019-12-18 19:33:34,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:34,921 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389226731] [2019-12-18 19:33:34,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:34,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389226731] [2019-12-18 19:33:34,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491031679] [2019-12-18 19:33:34,996 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:35,038 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 19:33:35,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:35,039 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 19:33:35,042 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:35,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:35,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 19:33:35,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792142196] [2019-12-18 19:33:35,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 19:33:35,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:35,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 19:33:35,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:33:35,169 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-18 19:33:35,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:35,374 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-18 19:33:35,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 19:33:35,375 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 19:33:35,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:35,376 INFO L225 Difference]: With dead ends: 107 [2019-12-18 19:33:35,376 INFO L226 Difference]: Without dead ends: 106 [2019-12-18 19:33:35,377 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2019-12-18 19:33:35,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-18 19:33:35,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2019-12-18 19:33:35,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-18 19:33:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-18 19:33:35,381 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-18 19:33:35,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:35,381 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-18 19:33:35,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 19:33:35,382 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-18 19:33:35,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 19:33:35,382 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:35,382 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:35,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:35,586 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:35,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:35,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555214, now seen corresponding path program 10 times [2019-12-18 19:33:35,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:35,587 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237296282] [2019-12-18 19:33:35,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:35,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:35,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237296282] [2019-12-18 19:33:35,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337833896] [2019-12-18 19:33:35,673 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:35,731 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:33:35,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:35,732 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 19:33:35,734 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:35,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:35,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 19:33:35,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286396345] [2019-12-18 19:33:35,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 19:33:35,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:35,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 19:33:35,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:33:35,827 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-18 19:33:36,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:36,029 INFO L93 Difference]: Finished difference Result 117 states and 243 transitions. [2019-12-18 19:33:36,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 19:33:36,030 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 19:33:36,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:36,032 INFO L225 Difference]: With dead ends: 117 [2019-12-18 19:33:36,032 INFO L226 Difference]: Without dead ends: 115 [2019-12-18 19:33:36,032 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:33:36,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-18 19:33:36,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 83. [2019-12-18 19:33:36,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 19:33:36,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 183 transitions. [2019-12-18 19:33:36,036 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 183 transitions. Word has length 11 [2019-12-18 19:33:36,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:36,036 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 183 transitions. [2019-12-18 19:33:36,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 19:33:36,037 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 183 transitions. [2019-12-18 19:33:36,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 19:33:36,037 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:36,037 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:36,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:36,241 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:36,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:36,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1467559864, now seen corresponding path program 11 times [2019-12-18 19:33:36,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:36,242 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114649435] [2019-12-18 19:33:36,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:36,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114649435] [2019-12-18 19:33:36,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721199912] [2019-12-18 19:33:36,317 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:36,368 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:33:36,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:36,369 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 19:33:36,371 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:36,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:36,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 19:33:36,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9612840] [2019-12-18 19:33:36,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 19:33:36,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:36,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 19:33:36,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:33:36,450 INFO L87 Difference]: Start difference. First operand 83 states and 183 transitions. Second operand 12 states. [2019-12-18 19:33:36,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:36,601 INFO L93 Difference]: Finished difference Result 121 states and 250 transitions. [2019-12-18 19:33:36,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 19:33:36,601 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 19:33:36,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:36,602 INFO L225 Difference]: With dead ends: 121 [2019-12-18 19:33:36,602 INFO L226 Difference]: Without dead ends: 119 [2019-12-18 19:33:36,602 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:33:36,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-18 19:33:36,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 85. [2019-12-18 19:33:36,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 19:33:36,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 19:33:36,605 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 19:33:36,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:36,605 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 19:33:36,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 19:33:36,605 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 19:33:36,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 19:33:36,607 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:36,607 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:36,807 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:36,808 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:36,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:36,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1467560019, now seen corresponding path program 12 times [2019-12-18 19:33:36,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:36,809 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726572022] [2019-12-18 19:33:36,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:36,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726572022] [2019-12-18 19:33:36,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79503548] [2019-12-18 19:33:36,877 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:36,925 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 19:33:36,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:36,926 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 19:33:36,927 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:37,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:37,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 19:33:37,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307200347] [2019-12-18 19:33:37,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 19:33:37,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:37,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 19:33:37,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:33:37,005 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 19:33:37,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:37,217 INFO L93 Difference]: Finished difference Result 117 states and 243 transitions. [2019-12-18 19:33:37,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 19:33:37,218 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 19:33:37,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:37,219 INFO L225 Difference]: With dead ends: 117 [2019-12-18 19:33:37,219 INFO L226 Difference]: Without dead ends: 115 [2019-12-18 19:33:37,219 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2019-12-18 19:33:37,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-18 19:33:37,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 88. [2019-12-18 19:33:37,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-18 19:33:37,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 194 transitions. [2019-12-18 19:33:37,222 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 194 transitions. Word has length 11 [2019-12-18 19:33:37,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:37,222 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 194 transitions. [2019-12-18 19:33:37,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 19:33:37,222 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 194 transitions. [2019-12-18 19:33:37,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 19:33:37,222 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:37,222 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:37,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:37,423 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:37,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:37,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380934, now seen corresponding path program 13 times [2019-12-18 19:33:37,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:37,424 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134477640] [2019-12-18 19:33:37,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:37,490 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134477640] [2019-12-18 19:33:37,490 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988815997] [2019-12-18 19:33:37,490 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:37,535 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 19:33:37,536 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:37,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:37,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 19:33:37,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162116862] [2019-12-18 19:33:37,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 19:33:37,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:37,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 19:33:37,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:33:37,601 INFO L87 Difference]: Start difference. First operand 88 states and 194 transitions. Second operand 12 states. [2019-12-18 19:33:37,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:37,783 INFO L93 Difference]: Finished difference Result 108 states and 224 transitions. [2019-12-18 19:33:37,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 19:33:37,787 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 19:33:37,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:37,788 INFO L225 Difference]: With dead ends: 108 [2019-12-18 19:33:37,788 INFO L226 Difference]: Without dead ends: 107 [2019-12-18 19:33:37,789 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:33:37,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-12-18 19:33:37,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 86. [2019-12-18 19:33:37,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-18 19:33:37,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-18 19:33:37,806 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-18 19:33:37,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:37,807 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-18 19:33:37,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 19:33:37,807 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-18 19:33:37,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 19:33:37,807 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:37,807 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:38,010 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:38,011 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:38,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:38,011 INFO L82 PathProgramCache]: Analyzing trace with hash -2065667792, now seen corresponding path program 5 times [2019-12-18 19:33:38,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:38,012 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069115794] [2019-12-18 19:33:38,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:38,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069115794] [2019-12-18 19:33:38,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139433540] [2019-12-18 19:33:38,077 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:38,125 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:33:38,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:38,126 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:38,127 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:38,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:38,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:38,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068219056] [2019-12-18 19:33:38,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:38,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:38,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:38,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:38,211 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 14 states. [2019-12-18 19:33:38,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:38,344 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-18 19:33:38,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 19:33:38,344 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-18 19:33:38,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:38,345 INFO L225 Difference]: With dead ends: 107 [2019-12-18 19:33:38,346 INFO L226 Difference]: Without dead ends: 106 [2019-12-18 19:33:38,346 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2019-12-18 19:33:38,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-18 19:33:38,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2019-12-18 19:33:38,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-18 19:33:38,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-18 19:33:38,351 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-18 19:33:38,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:38,351 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-18 19:33:38,351 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:38,351 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-18 19:33:38,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:38,352 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:38,352 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:38,555 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:38,555 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:38,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:38,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1717033399, now seen corresponding path program 6 times [2019-12-18 19:33:38,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:38,556 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218776382] [2019-12-18 19:33:38,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:38,643 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218776382] [2019-12-18 19:33:38,643 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312371651] [2019-12-18 19:33:38,644 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:38,701 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 19:33:38,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:38,702 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 19:33:38,703 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:38,790 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:38,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 19:33:38,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 15 [2019-12-18 19:33:38,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806403795] [2019-12-18 19:33:38,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 19:33:38,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:38,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 19:33:38,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2019-12-18 19:33:38,792 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 8 states. [2019-12-18 19:33:38,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:38,827 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2019-12-18 19:33:38,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 19:33:38,828 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-18 19:33:38,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:38,829 INFO L225 Difference]: With dead ends: 124 [2019-12-18 19:33:38,829 INFO L226 Difference]: Without dead ends: 115 [2019-12-18 19:33:38,830 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2019-12-18 19:33:38,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-18 19:33:38,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2019-12-18 19:33:38,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-18 19:33:38,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 274 transitions. [2019-12-18 19:33:38,835 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 274 transitions. Word has length 12 [2019-12-18 19:33:38,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:38,835 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 274 transitions. [2019-12-18 19:33:38,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 19:33:38,835 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 274 transitions. [2019-12-18 19:33:38,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:38,836 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:38,836 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:39,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:39,040 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:39,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:39,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1717034515, now seen corresponding path program 14 times [2019-12-18 19:33:39,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:39,041 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666429472] [2019-12-18 19:33:39,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:39,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:39,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:39,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666429472] [2019-12-18 19:33:39,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280398054] [2019-12-18 19:33:39,131 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:39,176 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:33:39,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:39,177 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:33:39,183 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:39,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:39,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:39,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459442764] [2019-12-18 19:33:39,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:39,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:39,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:39,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:39,269 INFO L87 Difference]: Start difference. First operand 115 states and 274 transitions. Second operand 14 states. [2019-12-18 19:33:39,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:39,373 INFO L93 Difference]: Finished difference Result 139 states and 317 transitions. [2019-12-18 19:33:39,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 19:33:39,373 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:39,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:39,374 INFO L225 Difference]: With dead ends: 139 [2019-12-18 19:33:39,374 INFO L226 Difference]: Without dead ends: 138 [2019-12-18 19:33:39,375 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2019-12-18 19:33:39,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-12-18 19:33:39,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 117. [2019-12-18 19:33:39,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-18 19:33:39,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 279 transitions. [2019-12-18 19:33:39,379 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 279 transitions. Word has length 12 [2019-12-18 19:33:39,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:39,379 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 279 transitions. [2019-12-18 19:33:39,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:39,379 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 279 transitions. [2019-12-18 19:33:39,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:39,381 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:39,381 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:39,584 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:39,584 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:39,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:39,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1717068150, now seen corresponding path program 15 times [2019-12-18 19:33:39,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:39,586 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424990187] [2019-12-18 19:33:39,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:39,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:39,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424990187] [2019-12-18 19:33:39,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164924637] [2019-12-18 19:33:39,667 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:39,718 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 19:33:39,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:39,719 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:39,720 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:39,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:39,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:39,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758738171] [2019-12-18 19:33:39,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:39,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:39,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:39,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:39,835 INFO L87 Difference]: Start difference. First operand 117 states and 279 transitions. Second operand 14 states. [2019-12-18 19:33:40,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:40,143 INFO L93 Difference]: Finished difference Result 147 states and 334 transitions. [2019-12-18 19:33:40,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 19:33:40,143 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:40,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:40,144 INFO L225 Difference]: With dead ends: 147 [2019-12-18 19:33:40,144 INFO L226 Difference]: Without dead ends: 146 [2019-12-18 19:33:40,145 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2019-12-18 19:33:40,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-18 19:33:40,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 118. [2019-12-18 19:33:40,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-12-18 19:33:40,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 283 transitions. [2019-12-18 19:33:40,149 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 283 transitions. Word has length 12 [2019-12-18 19:33:40,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:40,152 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 283 transitions. [2019-12-18 19:33:40,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:40,152 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 283 transitions. [2019-12-18 19:33:40,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:40,152 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:40,153 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:40,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:40,356 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:40,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:40,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1717067995, now seen corresponding path program 16 times [2019-12-18 19:33:40,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:40,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766195480] [2019-12-18 19:33:40,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:40,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:40,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766195480] [2019-12-18 19:33:40,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975641147] [2019-12-18 19:33:40,441 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:40,492 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:33:40,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:40,492 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:40,493 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:41,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:41,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:41,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711594001] [2019-12-18 19:33:41,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:41,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:41,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:41,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:41,569 INFO L87 Difference]: Start difference. First operand 118 states and 283 transitions. Second operand 14 states. [2019-12-18 19:33:41,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:41,887 INFO L93 Difference]: Finished difference Result 150 states and 340 transitions. [2019-12-18 19:33:41,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 19:33:41,888 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:41,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:41,889 INFO L225 Difference]: With dead ends: 150 [2019-12-18 19:33:41,889 INFO L226 Difference]: Without dead ends: 149 [2019-12-18 19:33:41,890 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2019-12-18 19:33:41,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-18 19:33:41,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 119. [2019-12-18 19:33:41,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-18 19:33:41,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 284 transitions. [2019-12-18 19:33:41,895 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 284 transitions. Word has length 12 [2019-12-18 19:33:41,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:41,896 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 284 transitions. [2019-12-18 19:33:41,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:41,896 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 284 transitions. [2019-12-18 19:33:41,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:41,896 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:41,897 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:42,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:42,100 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:42,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:42,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110835, now seen corresponding path program 17 times [2019-12-18 19:33:42,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:42,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528084855] [2019-12-18 19:33:42,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:42,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528084855] [2019-12-18 19:33:42,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667076349] [2019-12-18 19:33:42,184 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:42,257 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:33:42,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:42,259 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:42,264 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:42,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:42,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:42,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375133949] [2019-12-18 19:33:42,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:42,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:42,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:42,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:42,430 INFO L87 Difference]: Start difference. First operand 119 states and 284 transitions. Second operand 14 states. [2019-12-18 19:33:42,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:42,723 INFO L93 Difference]: Finished difference Result 151 states and 339 transitions. [2019-12-18 19:33:42,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 19:33:42,724 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:42,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:42,726 INFO L225 Difference]: With dead ends: 151 [2019-12-18 19:33:42,726 INFO L226 Difference]: Without dead ends: 149 [2019-12-18 19:33:42,726 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2019-12-18 19:33:42,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-18 19:33:42,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 125. [2019-12-18 19:33:42,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-18 19:33:42,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 305 transitions. [2019-12-18 19:33:42,736 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 305 transitions. Word has length 12 [2019-12-18 19:33:42,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:42,737 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 305 transitions. [2019-12-18 19:33:42,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:42,737 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 305 transitions. [2019-12-18 19:33:42,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:42,738 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:42,738 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:42,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:42,943 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:42,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:42,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110680, now seen corresponding path program 18 times [2019-12-18 19:33:42,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:42,944 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769264580] [2019-12-18 19:33:42,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:43,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769264580] [2019-12-18 19:33:43,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711351004] [2019-12-18 19:33:43,044 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:43,088 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:33:43,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:43,089 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:43,090 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:43,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:43,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:43,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576142447] [2019-12-18 19:33:43,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:43,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:43,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:43,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:43,201 INFO L87 Difference]: Start difference. First operand 125 states and 305 transitions. Second operand 14 states. [2019-12-18 19:33:43,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:43,498 INFO L93 Difference]: Finished difference Result 166 states and 375 transitions. [2019-12-18 19:33:43,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 19:33:43,498 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:43,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:43,500 INFO L225 Difference]: With dead ends: 166 [2019-12-18 19:33:43,500 INFO L226 Difference]: Without dead ends: 164 [2019-12-18 19:33:43,500 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2019-12-18 19:33:43,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-12-18 19:33:43,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 123. [2019-12-18 19:33:43,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-12-18 19:33:43,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 297 transitions. [2019-12-18 19:33:43,506 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 297 transitions. Word has length 12 [2019-12-18 19:33:43,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:43,507 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 297 transitions. [2019-12-18 19:33:43,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:43,508 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 297 transitions. [2019-12-18 19:33:43,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:43,508 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:43,508 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:43,709 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:43,709 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:43,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:43,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1718106030, now seen corresponding path program 19 times [2019-12-18 19:33:43,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:43,710 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148139279] [2019-12-18 19:33:43,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:43,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:43,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148139279] [2019-12-18 19:33:43,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042299972] [2019-12-18 19:33:43,788 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:43,832 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:43,833 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:44,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:44,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:44,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:44,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102574119] [2019-12-18 19:33:44,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:44,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:44,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:44,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:44,051 INFO L87 Difference]: Start difference. First operand 123 states and 297 transitions. Second operand 14 states. [2019-12-18 19:33:44,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:44,466 INFO L93 Difference]: Finished difference Result 162 states and 367 transitions. [2019-12-18 19:33:44,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 19:33:44,467 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:44,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:44,469 INFO L225 Difference]: With dead ends: 162 [2019-12-18 19:33:44,469 INFO L226 Difference]: Without dead ends: 161 [2019-12-18 19:33:44,470 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-12-18 19:33:44,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-18 19:33:44,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 124. [2019-12-18 19:33:44,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 19:33:44,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 301 transitions. [2019-12-18 19:33:44,477 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 301 transitions. Word has length 12 [2019-12-18 19:33:44,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:44,477 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 301 transitions. [2019-12-18 19:33:44,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:44,478 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 301 transitions. [2019-12-18 19:33:44,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:44,479 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:44,479 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:44,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:44,684 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:44,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:44,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1718105875, now seen corresponding path program 20 times [2019-12-18 19:33:44,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:44,684 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209468039] [2019-12-18 19:33:44,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:44,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:44,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209468039] [2019-12-18 19:33:44,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455913388] [2019-12-18 19:33:44,766 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:44,808 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:33:44,809 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:44,809 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:44,810 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:44,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:44,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:44,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103385938] [2019-12-18 19:33:44,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:44,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:44,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:44,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:44,934 INFO L87 Difference]: Start difference. First operand 124 states and 301 transitions. Second operand 14 states. [2019-12-18 19:33:45,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:45,200 INFO L93 Difference]: Finished difference Result 153 states and 352 transitions. [2019-12-18 19:33:45,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 19:33:45,202 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:45,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:45,203 INFO L225 Difference]: With dead ends: 153 [2019-12-18 19:33:45,204 INFO L226 Difference]: Without dead ends: 152 [2019-12-18 19:33:45,204 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-12-18 19:33:45,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-18 19:33:45,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 124. [2019-12-18 19:33:45,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 19:33:45,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 298 transitions. [2019-12-18 19:33:45,210 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 298 transitions. Word has length 12 [2019-12-18 19:33:45,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:45,210 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 298 transitions. [2019-12-18 19:33:45,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:45,211 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 298 transitions. [2019-12-18 19:33:45,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:45,211 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:45,211 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:45,414 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:45,414 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:45,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:45,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429265, now seen corresponding path program 21 times [2019-12-18 19:33:45,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:45,416 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222811648] [2019-12-18 19:33:45,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:45,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222811648] [2019-12-18 19:33:45,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658092492] [2019-12-18 19:33:45,505 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:45,549 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 19:33:45,550 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:45,551 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 19:33:45,552 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:45,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:45,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:45,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398997510] [2019-12-18 19:33:45,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:45,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:45,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:45,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:45,650 INFO L87 Difference]: Start difference. First operand 124 states and 298 transitions. Second operand 14 states. [2019-12-18 19:33:46,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:46,010 INFO L93 Difference]: Finished difference Result 184 states and 407 transitions. [2019-12-18 19:33:46,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 19:33:46,010 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:46,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:46,011 INFO L225 Difference]: With dead ends: 184 [2019-12-18 19:33:46,012 INFO L226 Difference]: Without dead ends: 181 [2019-12-18 19:33:46,012 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2019-12-18 19:33:46,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-18 19:33:46,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 127. [2019-12-18 19:33:46,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-18 19:33:46,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 310 transitions. [2019-12-18 19:33:46,020 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 310 transitions. Word has length 12 [2019-12-18 19:33:46,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:46,020 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 310 transitions. [2019-12-18 19:33:46,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:46,021 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 310 transitions. [2019-12-18 19:33:46,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:46,021 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:46,022 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:46,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:46,225 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:46,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:46,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429110, now seen corresponding path program 22 times [2019-12-18 19:33:46,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:46,226 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967076527] [2019-12-18 19:33:46,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:46,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967076527] [2019-12-18 19:33:46,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369157132] [2019-12-18 19:33:46,301 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:46,343 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:33:46,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:46,344 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:46,344 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:46,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:46,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:46,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242397089] [2019-12-18 19:33:46,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:46,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:46,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:46,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:46,450 INFO L87 Difference]: Start difference. First operand 127 states and 310 transitions. Second operand 14 states. [2019-12-18 19:33:46,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:46,762 INFO L93 Difference]: Finished difference Result 177 states and 400 transitions. [2019-12-18 19:33:46,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 19:33:46,766 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:46,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:46,767 INFO L225 Difference]: With dead ends: 177 [2019-12-18 19:33:46,767 INFO L226 Difference]: Without dead ends: 175 [2019-12-18 19:33:46,768 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2019-12-18 19:33:46,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-18 19:33:46,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 128. [2019-12-18 19:33:46,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-18 19:33:46,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 311 transitions. [2019-12-18 19:33:46,772 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 311 transitions. Word has length 12 [2019-12-18 19:33:46,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:46,772 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 311 transitions. [2019-12-18 19:33:46,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:46,773 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 311 transitions. [2019-12-18 19:33:46,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:46,773 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:46,773 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:46,976 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:46,976 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:46,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:46,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1750285115, now seen corresponding path program 23 times [2019-12-18 19:33:46,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:46,978 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35805199] [2019-12-18 19:33:46,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:47,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35805199] [2019-12-18 19:33:47,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732362021] [2019-12-18 19:33:47,054 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:47,097 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:33:47,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:47,098 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:47,098 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:47,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:47,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:47,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115064052] [2019-12-18 19:33:47,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:47,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:47,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:47,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:47,185 INFO L87 Difference]: Start difference. First operand 128 states and 311 transitions. Second operand 14 states. [2019-12-18 19:33:47,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:47,464 INFO L93 Difference]: Finished difference Result 187 states and 421 transitions. [2019-12-18 19:33:47,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 19:33:47,464 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:47,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:47,465 INFO L225 Difference]: With dead ends: 187 [2019-12-18 19:33:47,465 INFO L226 Difference]: Without dead ends: 185 [2019-12-18 19:33:47,466 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2019-12-18 19:33:47,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-12-18 19:33:47,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 132. [2019-12-18 19:33:47,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-12-18 19:33:47,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2019-12-18 19:33:47,472 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2019-12-18 19:33:47,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:47,472 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2019-12-18 19:33:47,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:47,472 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2019-12-18 19:33:47,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:47,474 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:47,474 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:47,677 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:47,678 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:47,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:47,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1750284960, now seen corresponding path program 24 times [2019-12-18 19:33:47,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:47,679 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557676651] [2019-12-18 19:33:47,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:47,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557676651] [2019-12-18 19:33:47,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568289364] [2019-12-18 19:33:47,745 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:47,793 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:33:47,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:47,794 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:47,795 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:47,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:47,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:47,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752443098] [2019-12-18 19:33:47,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:47,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:47,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:47,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:47,873 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 14 states. [2019-12-18 19:33:48,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:48,090 INFO L93 Difference]: Finished difference Result 185 states and 422 transitions. [2019-12-18 19:33:48,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 19:33:48,091 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:48,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:48,093 INFO L225 Difference]: With dead ends: 185 [2019-12-18 19:33:48,093 INFO L226 Difference]: Without dead ends: 183 [2019-12-18 19:33:48,094 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2019-12-18 19:33:48,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-18 19:33:48,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 131. [2019-12-18 19:33:48,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-18 19:33:48,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 323 transitions. [2019-12-18 19:33:48,098 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 323 transitions. Word has length 12 [2019-12-18 19:33:48,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:48,099 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 323 transitions. [2019-12-18 19:33:48,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:48,099 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 323 transitions. [2019-12-18 19:33:48,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:48,099 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:48,100 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:48,302 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:48,303 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:48,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:48,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1750280310, now seen corresponding path program 25 times [2019-12-18 19:33:48,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:48,304 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746619049] [2019-12-18 19:33:48,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:48,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746619049] [2019-12-18 19:33:48,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482371854] [2019-12-18 19:33:48,365 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:48,418 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:48,419 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:48,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:48,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:48,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944751642] [2019-12-18 19:33:48,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:48,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:48,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:48,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:48,514 INFO L87 Difference]: Start difference. First operand 131 states and 323 transitions. Second operand 14 states. [2019-12-18 19:33:48,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:48,805 INFO L93 Difference]: Finished difference Result 179 states and 406 transitions. [2019-12-18 19:33:48,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 19:33:48,806 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:48,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:48,807 INFO L225 Difference]: With dead ends: 179 [2019-12-18 19:33:48,807 INFO L226 Difference]: Without dead ends: 177 [2019-12-18 19:33:48,808 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2019-12-18 19:33:48,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-18 19:33:48,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 130. [2019-12-18 19:33:48,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-18 19:33:48,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 319 transitions. [2019-12-18 19:33:48,812 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 319 transitions. Word has length 12 [2019-12-18 19:33:48,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:48,812 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 319 transitions. [2019-12-18 19:33:48,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:48,812 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 319 transitions. [2019-12-18 19:33:48,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:48,813 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:48,813 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:49,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:49,017 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:49,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:49,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135351, now seen corresponding path program 26 times [2019-12-18 19:33:49,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:49,018 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900670714] [2019-12-18 19:33:49,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:49,094 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900670714] [2019-12-18 19:33:49,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271951897] [2019-12-18 19:33:49,095 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:49,142 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:33:49,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:49,143 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:49,144 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:49,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:49,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:49,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716861924] [2019-12-18 19:33:49,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:49,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:49,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:49,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:49,234 INFO L87 Difference]: Start difference. First operand 130 states and 319 transitions. Second operand 14 states. [2019-12-18 19:33:49,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:49,474 INFO L93 Difference]: Finished difference Result 175 states and 398 transitions. [2019-12-18 19:33:49,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 19:33:49,479 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:49,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:49,480 INFO L225 Difference]: With dead ends: 175 [2019-12-18 19:33:49,481 INFO L226 Difference]: Without dead ends: 174 [2019-12-18 19:33:49,481 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2019-12-18 19:33:49,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-12-18 19:33:49,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 128. [2019-12-18 19:33:49,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-18 19:33:49,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 311 transitions. [2019-12-18 19:33:49,485 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 311 transitions. Word has length 12 [2019-12-18 19:33:49,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:49,486 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 311 transitions. [2019-12-18 19:33:49,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:49,486 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 311 transitions. [2019-12-18 19:33:49,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:49,486 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:49,487 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:49,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:49,690 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:49,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:49,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1547284461, now seen corresponding path program 27 times [2019-12-18 19:33:49,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:49,691 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050894801] [2019-12-18 19:33:49,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:49,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050894801] [2019-12-18 19:33:49,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909539691] [2019-12-18 19:33:49,763 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:49,806 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 19:33:49,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:49,807 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:49,808 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:49,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:49,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:49,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633944205] [2019-12-18 19:33:49,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:49,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:49,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:49,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:49,896 INFO L87 Difference]: Start difference. First operand 128 states and 311 transitions. Second operand 14 states. [2019-12-18 19:33:50,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:50,110 INFO L93 Difference]: Finished difference Result 147 states and 334 transitions. [2019-12-18 19:33:50,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 19:33:50,111 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:50,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:50,112 INFO L225 Difference]: With dead ends: 147 [2019-12-18 19:33:50,112 INFO L226 Difference]: Without dead ends: 146 [2019-12-18 19:33:50,113 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2019-12-18 19:33:50,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-18 19:33:50,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 129. [2019-12-18 19:33:50,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-18 19:33:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 303 transitions. [2019-12-18 19:33:50,118 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 303 transitions. Word has length 12 [2019-12-18 19:33:50,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:50,118 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 303 transitions. [2019-12-18 19:33:50,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:50,119 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 303 transitions. [2019-12-18 19:33:50,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:50,119 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:50,119 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:50,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:50,323 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:50,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:50,323 INFO L82 PathProgramCache]: Analyzing trace with hash 388808531, now seen corresponding path program 6 times [2019-12-18 19:33:50,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:50,324 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045285875] [2019-12-18 19:33:50,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:50,393 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:50,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045285875] [2019-12-18 19:33:50,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038697085] [2019-12-18 19:33:50,394 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:50,442 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 19:33:50,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:50,443 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 19:33:50,443 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:50,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 19:33:50,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 15 [2019-12-18 19:33:50,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739155224] [2019-12-18 19:33:50,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 19:33:50,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:50,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 19:33:50,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2019-12-18 19:33:50,513 INFO L87 Difference]: Start difference. First operand 129 states and 303 transitions. Second operand 8 states. [2019-12-18 19:33:50,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:50,534 INFO L93 Difference]: Finished difference Result 161 states and 374 transitions. [2019-12-18 19:33:50,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 19:33:50,534 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-18 19:33:50,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:50,536 INFO L225 Difference]: With dead ends: 161 [2019-12-18 19:33:50,536 INFO L226 Difference]: Without dead ends: 154 [2019-12-18 19:33:50,536 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2019-12-18 19:33:50,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-12-18 19:33:50,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2019-12-18 19:33:50,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 19:33:50,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 359 transitions. [2019-12-18 19:33:50,541 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 359 transitions. Word has length 12 [2019-12-18 19:33:50,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:50,541 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 359 transitions. [2019-12-18 19:33:50,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 19:33:50,542 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 359 transitions. [2019-12-18 19:33:50,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:33:50,542 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:50,542 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:50,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:50,746 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:50,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:50,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1688429421, now seen corresponding path program 28 times [2019-12-18 19:33:50,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:50,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364320701] [2019-12-18 19:33:50,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:50,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:50,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:50,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364320701] [2019-12-18 19:33:50,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741381570] [2019-12-18 19:33:50,832 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:50,882 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:33:50,883 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:50,883 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:33:50,884 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:50,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:50,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:33:50,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598627112] [2019-12-18 19:33:50,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:33:50,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:50,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:33:50,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:33:50,987 INFO L87 Difference]: Start difference. First operand 154 states and 359 transitions. Second operand 16 states. [2019-12-18 19:33:51,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:51,298 INFO L93 Difference]: Finished difference Result 179 states and 407 transitions. [2019-12-18 19:33:51,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 19:33:51,299 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:33:51,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:51,301 INFO L225 Difference]: With dead ends: 179 [2019-12-18 19:33:51,301 INFO L226 Difference]: Without dead ends: 177 [2019-12-18 19:33:51,301 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2019-12-18 19:33:51,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-18 19:33:51,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 153. [2019-12-18 19:33:51,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-18 19:33:51,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 359 transitions. [2019-12-18 19:33:51,306 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 359 transitions. Word has length 13 [2019-12-18 19:33:51,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:51,307 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 359 transitions. [2019-12-18 19:33:51,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:33:51,307 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 359 transitions. [2019-12-18 19:33:51,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:33:51,307 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:51,308 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:51,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:51,511 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:51,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:51,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1688463056, now seen corresponding path program 29 times [2019-12-18 19:33:51,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:51,512 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032167822] [2019-12-18 19:33:51,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:51,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032167822] [2019-12-18 19:33:51,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504121595] [2019-12-18 19:33:51,602 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:51,651 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:33:51,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:51,653 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:33:51,653 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:51,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:51,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:33:51,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936827683] [2019-12-18 19:33:51,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:33:51,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:51,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:33:51,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:33:51,763 INFO L87 Difference]: Start difference. First operand 153 states and 359 transitions. Second operand 16 states. [2019-12-18 19:33:52,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:52,113 INFO L93 Difference]: Finished difference Result 189 states and 429 transitions. [2019-12-18 19:33:52,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 19:33:52,114 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:33:52,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:52,115 INFO L225 Difference]: With dead ends: 189 [2019-12-18 19:33:52,116 INFO L226 Difference]: Without dead ends: 188 [2019-12-18 19:33:52,116 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2019-12-18 19:33:52,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-18 19:33:52,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 155. [2019-12-18 19:33:52,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-18 19:33:52,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 367 transitions. [2019-12-18 19:33:52,121 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 367 transitions. Word has length 13 [2019-12-18 19:33:52,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:52,122 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 367 transitions. [2019-12-18 19:33:52,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:33:52,122 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 367 transitions. [2019-12-18 19:33:52,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:33:52,123 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:52,123 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:52,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:52,324 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:52,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:52,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1688462901, now seen corresponding path program 30 times [2019-12-18 19:33:52,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:52,325 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664791636] [2019-12-18 19:33:52,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:52,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664791636] [2019-12-18 19:33:52,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116951378] [2019-12-18 19:33:52,405 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:52,452 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:33:52,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:52,453 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:33:52,454 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:52,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:52,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:33:52,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947863329] [2019-12-18 19:33:52,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:33:52,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:52,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:33:52,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:33:52,596 INFO L87 Difference]: Start difference. First operand 155 states and 367 transitions. Second operand 16 states. [2019-12-18 19:33:53,071 WARN L192 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2019-12-18 19:33:53,401 WARN L192 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-12-18 19:33:53,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:53,455 INFO L93 Difference]: Finished difference Result 189 states and 430 transitions. [2019-12-18 19:33:53,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 19:33:53,455 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:33:53,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:53,457 INFO L225 Difference]: With dead ends: 189 [2019-12-18 19:33:53,457 INFO L226 Difference]: Without dead ends: 186 [2019-12-18 19:33:53,458 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2019-12-18 19:33:53,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-18 19:33:53,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 155. [2019-12-18 19:33:53,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-18 19:33:53,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 366 transitions. [2019-12-18 19:33:53,463 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 366 transitions. Word has length 13 [2019-12-18 19:33:53,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:53,463 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 366 transitions. [2019-12-18 19:33:53,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:33:53,463 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 366 transitions. [2019-12-18 19:33:53,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:33:53,464 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:53,464 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:53,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:53,667 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:53,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:53,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505741, now seen corresponding path program 31 times [2019-12-18 19:33:53,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:53,669 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408382848] [2019-12-18 19:33:53,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:53,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:53,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408382848] [2019-12-18 19:33:53,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305568961] [2019-12-18 19:33:53,761 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:53,803 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:33:53,804 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:53,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:53,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:33:53,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815968138] [2019-12-18 19:33:53,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:33:53,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:53,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:33:53,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:33:53,911 INFO L87 Difference]: Start difference. First operand 155 states and 366 transitions. Second operand 16 states. [2019-12-18 19:33:54,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:54,326 INFO L93 Difference]: Finished difference Result 198 states and 450 transitions. [2019-12-18 19:33:54,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 19:33:54,327 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:33:54,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:54,328 INFO L225 Difference]: With dead ends: 198 [2019-12-18 19:33:54,329 INFO L226 Difference]: Without dead ends: 196 [2019-12-18 19:33:54,329 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2019-12-18 19:33:54,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-12-18 19:33:54,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 162. [2019-12-18 19:33:54,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-18 19:33:54,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 394 transitions. [2019-12-18 19:33:54,341 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 394 transitions. Word has length 13 [2019-12-18 19:33:54,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:54,341 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 394 transitions. [2019-12-18 19:33:54,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:33:54,342 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 394 transitions. [2019-12-18 19:33:54,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:33:54,342 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:54,342 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:54,545 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:54,546 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:54,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:54,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505586, now seen corresponding path program 32 times [2019-12-18 19:33:54,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:54,547 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296180856] [2019-12-18 19:33:54,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:54,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296180856] [2019-12-18 19:33:54,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248528118] [2019-12-18 19:33:54,631 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:54,681 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:33:54,681 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:54,682 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:33:54,683 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:55,193 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_121 Int)) (and (<= (div (+ (* v_~j~0_121 (- 1)) 1) (- 3)) 1) (<= c_~i~0 (+ (* 2 v_~j~0_121) 1)) (<= c_~j~0 (+ c_~i~0 v_~j~0_121)))) is different from true [2019-12-18 19:33:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:55,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:55,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:33:55,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838287598] [2019-12-18 19:33:55,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:33:55,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:55,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:33:55,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=157, Unknown=1, NotChecked=26, Total=240 [2019-12-18 19:33:55,196 INFO L87 Difference]: Start difference. First operand 162 states and 394 transitions. Second operand 16 states. [2019-12-18 19:33:57,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:57,767 INFO L93 Difference]: Finished difference Result 222 states and 501 transitions. [2019-12-18 19:33:57,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 19:33:57,769 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:33:57,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:57,770 INFO L225 Difference]: With dead ends: 222 [2019-12-18 19:33:57,770 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 19:33:57,771 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=274, Invalid=598, Unknown=2, NotChecked=56, Total=930 [2019-12-18 19:33:57,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 19:33:57,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2019-12-18 19:33:57,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-18 19:33:57,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 394 transitions. [2019-12-18 19:33:57,775 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 394 transitions. Word has length 13 [2019-12-18 19:33:57,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:57,775 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 394 transitions. [2019-12-18 19:33:57,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:33:57,775 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 394 transitions. [2019-12-18 19:33:57,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:33:57,776 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:57,776 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:57,979 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:57,979 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:57,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:57,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500936, now seen corresponding path program 33 times [2019-12-18 19:33:57,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:57,980 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627776736] [2019-12-18 19:33:57,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:58,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627776736] [2019-12-18 19:33:58,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766410424] [2019-12-18 19:33:58,086 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:58,155 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 19:33:58,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:58,157 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:33:58,159 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:01,113 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 19:34:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:01,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:01,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:01,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511875898] [2019-12-18 19:34:01,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:01,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:01,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:01,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=174, Unknown=5, NotChecked=0, Total=240 [2019-12-18 19:34:01,115 INFO L87 Difference]: Start difference. First operand 162 states and 394 transitions. Second operand 16 states. [2019-12-18 19:34:01,791 WARN L192 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 19:34:02,419 WARN L192 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2019-12-18 19:34:02,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:02,567 INFO L93 Difference]: Finished difference Result 215 states and 488 transitions. [2019-12-18 19:34:02,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 19:34:02,567 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:02,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:02,568 INFO L225 Difference]: With dead ends: 215 [2019-12-18 19:34:02,568 INFO L226 Difference]: Without dead ends: 214 [2019-12-18 19:34:02,569 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=196, Invalid=449, Unknown=5, NotChecked=0, Total=650 [2019-12-18 19:34:02,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-12-18 19:34:02,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 163. [2019-12-18 19:34:02,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-12-18 19:34:02,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 398 transitions. [2019-12-18 19:34:02,574 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 398 transitions. Word has length 13 [2019-12-18 19:34:02,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:02,574 INFO L462 AbstractCegarLoop]: Abstraction has 163 states and 398 transitions. [2019-12-18 19:34:02,574 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:02,574 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 398 transitions. [2019-12-18 19:34:02,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:02,575 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:02,575 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:02,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:02,778 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:02,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:02,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500781, now seen corresponding path program 34 times [2019-12-18 19:34:02,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:02,779 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731245810] [2019-12-18 19:34:02,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:02,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731245810] [2019-12-18 19:34:02,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126848465] [2019-12-18 19:34:02,870 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:02,916 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:34:02,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:02,918 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:02,918 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:05,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:05,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:05,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535417008] [2019-12-18 19:34:05,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:05,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:05,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:05,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=176, Unknown=2, NotChecked=0, Total=240 [2019-12-18 19:34:05,269 INFO L87 Difference]: Start difference. First operand 163 states and 398 transitions. Second operand 16 states. [2019-12-18 19:34:06,517 WARN L192 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 19:34:07,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:07,288 INFO L93 Difference]: Finished difference Result 207 states and 474 transitions. [2019-12-18 19:34:07,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 19:34:07,288 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:07,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:07,290 INFO L225 Difference]: With dead ends: 207 [2019-12-18 19:34:07,290 INFO L226 Difference]: Without dead ends: 203 [2019-12-18 19:34:07,291 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=230, Invalid=524, Unknown=2, NotChecked=0, Total=756 [2019-12-18 19:34:07,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-12-18 19:34:07,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 162. [2019-12-18 19:34:07,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-18 19:34:07,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 393 transitions. [2019-12-18 19:34:07,296 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 393 transitions. Word has length 13 [2019-12-18 19:34:07,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:07,296 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 393 transitions. [2019-12-18 19:34:07,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:07,296 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 393 transitions. [2019-12-18 19:34:07,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:07,296 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:07,296 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:07,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:07,498 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:07,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:07,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828821, now seen corresponding path program 35 times [2019-12-18 19:34:07,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:07,499 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916920692] [2019-12-18 19:34:07,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:07,576 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916920692] [2019-12-18 19:34:07,577 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912033440] [2019-12-18 19:34:07,577 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:07,616 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:34:07,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:07,618 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:07,618 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:07,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:07,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:07,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273005762] [2019-12-18 19:34:07,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:07,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:07,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:07,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:07,756 INFO L87 Difference]: Start difference. First operand 162 states and 393 transitions. Second operand 16 states. [2019-12-18 19:34:08,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:08,215 INFO L93 Difference]: Finished difference Result 231 states and 523 transitions. [2019-12-18 19:34:08,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 19:34:08,216 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:08,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:08,217 INFO L225 Difference]: With dead ends: 231 [2019-12-18 19:34:08,218 INFO L226 Difference]: Without dead ends: 229 [2019-12-18 19:34:08,218 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2019-12-18 19:34:08,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-12-18 19:34:08,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 166. [2019-12-18 19:34:08,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-12-18 19:34:08,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 409 transitions. [2019-12-18 19:34:08,223 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 409 transitions. Word has length 13 [2019-12-18 19:34:08,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:08,224 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 409 transitions. [2019-12-18 19:34:08,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:08,224 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 409 transitions. [2019-12-18 19:34:08,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:08,225 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:08,225 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:08,427 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:08,428 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:08,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:08,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824171, now seen corresponding path program 36 times [2019-12-18 19:34:08,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:08,429 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674418734] [2019-12-18 19:34:08,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:08,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:08,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674418734] [2019-12-18 19:34:08,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725154097] [2019-12-18 19:34:08,535 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:08,574 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:34:08,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:08,575 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:08,576 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:08,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:08,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:08,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098124520] [2019-12-18 19:34:08,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:08,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:08,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:08,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:08,735 INFO L87 Difference]: Start difference. First operand 166 states and 409 transitions. Second operand 16 states. [2019-12-18 19:34:09,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:09,674 INFO L93 Difference]: Finished difference Result 242 states and 549 transitions. [2019-12-18 19:34:09,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 19:34:09,675 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:09,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:09,677 INFO L225 Difference]: With dead ends: 242 [2019-12-18 19:34:09,677 INFO L226 Difference]: Without dead ends: 240 [2019-12-18 19:34:09,677 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-12-18 19:34:09,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-12-18 19:34:09,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 168. [2019-12-18 19:34:09,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-12-18 19:34:09,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 417 transitions. [2019-12-18 19:34:09,685 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 417 transitions. Word has length 13 [2019-12-18 19:34:09,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:09,685 INFO L462 AbstractCegarLoop]: Abstraction has 168 states and 417 transitions. [2019-12-18 19:34:09,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:09,685 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 417 transitions. [2019-12-18 19:34:09,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:09,686 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:09,686 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:09,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:09,889 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:09,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:09,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824016, now seen corresponding path program 37 times [2019-12-18 19:34:09,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:09,890 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640996612] [2019-12-18 19:34:09,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:09,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640996612] [2019-12-18 19:34:09,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053025522] [2019-12-18 19:34:09,964 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:10,006 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:10,007 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:10,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:10,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:10,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:10,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338912856] [2019-12-18 19:34:10,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:10,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:10,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:10,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:10,161 INFO L87 Difference]: Start difference. First operand 168 states and 417 transitions. Second operand 16 states. [2019-12-18 19:34:10,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:10,681 INFO L93 Difference]: Finished difference Result 239 states and 543 transitions. [2019-12-18 19:34:10,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 19:34:10,681 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:10,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:10,683 INFO L225 Difference]: With dead ends: 239 [2019-12-18 19:34:10,683 INFO L226 Difference]: Without dead ends: 233 [2019-12-18 19:34:10,683 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2019-12-18 19:34:10,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-12-18 19:34:10,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 170. [2019-12-18 19:34:10,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-12-18 19:34:10,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 422 transitions. [2019-12-18 19:34:10,688 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 422 transitions. Word has length 13 [2019-12-18 19:34:10,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:10,689 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 422 transitions. [2019-12-18 19:34:10,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:10,689 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 422 transitions. [2019-12-18 19:34:10,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:10,690 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:10,690 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:10,890 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:10,891 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:10,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:10,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1721680021, now seen corresponding path program 38 times [2019-12-18 19:34:10,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:10,892 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039585680] [2019-12-18 19:34:10,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:10,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:10,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039585680] [2019-12-18 19:34:10,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646107190] [2019-12-18 19:34:10,978 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:11,024 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:34:11,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:11,025 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:11,025 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:11,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:11,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:11,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313875636] [2019-12-18 19:34:11,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:11,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:11,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:11,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:11,253 INFO L87 Difference]: Start difference. First operand 170 states and 422 transitions. Second operand 16 states. [2019-12-18 19:34:11,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:11,776 INFO L93 Difference]: Finished difference Result 230 states and 533 transitions. [2019-12-18 19:34:11,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 19:34:11,778 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:11,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:11,780 INFO L225 Difference]: With dead ends: 230 [2019-12-18 19:34:11,781 INFO L226 Difference]: Without dead ends: 229 [2019-12-18 19:34:11,781 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2019-12-18 19:34:11,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-12-18 19:34:11,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 171. [2019-12-18 19:34:11,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-12-18 19:34:11,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 426 transitions. [2019-12-18 19:34:11,785 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 426 transitions. Word has length 13 [2019-12-18 19:34:11,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:11,785 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 426 transitions. [2019-12-18 19:34:11,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:11,786 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 426 transitions. [2019-12-18 19:34:11,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:11,786 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:11,786 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:11,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:11,990 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:11,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:11,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1721679866, now seen corresponding path program 39 times [2019-12-18 19:34:11,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:11,991 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360612959] [2019-12-18 19:34:11,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:12,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360612959] [2019-12-18 19:34:12,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954443685] [2019-12-18 19:34:12,071 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:12,128 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 19:34:12,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:12,128 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:12,129 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:12,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:12,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:12,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151745089] [2019-12-18 19:34:12,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:12,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:12,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:12,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:12,310 INFO L87 Difference]: Start difference. First operand 171 states and 426 transitions. Second operand 16 states. [2019-12-18 19:34:12,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:12,739 INFO L93 Difference]: Finished difference Result 235 states and 545 transitions. [2019-12-18 19:34:12,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 19:34:12,740 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:12,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:12,741 INFO L225 Difference]: With dead ends: 235 [2019-12-18 19:34:12,742 INFO L226 Difference]: Without dead ends: 234 [2019-12-18 19:34:12,742 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2019-12-18 19:34:12,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2019-12-18 19:34:12,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 170. [2019-12-18 19:34:12,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-12-18 19:34:12,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 422 transitions. [2019-12-18 19:34:12,746 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 422 transitions. Word has length 13 [2019-12-18 19:34:12,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:12,747 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 422 transitions. [2019-12-18 19:34:12,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:12,747 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 422 transitions. [2019-12-18 19:34:12,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:12,747 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:12,747 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:12,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:12,951 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:12,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:12,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1721675216, now seen corresponding path program 40 times [2019-12-18 19:34:12,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:12,951 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788269760] [2019-12-18 19:34:12,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:13,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788269760] [2019-12-18 19:34:13,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654291895] [2019-12-18 19:34:13,043 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:13,097 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:34:13,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:13,098 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:13,099 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:17,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:17,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:17,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899075309] [2019-12-18 19:34:17,363 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:17,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:17,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:17,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:17,364 INFO L87 Difference]: Start difference. First operand 170 states and 422 transitions. Second operand 16 states. [2019-12-18 19:34:19,511 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-18 19:34:19,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:19,935 INFO L93 Difference]: Finished difference Result 224 states and 519 transitions. [2019-12-18 19:34:19,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 19:34:19,936 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:19,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:19,938 INFO L225 Difference]: With dead ends: 224 [2019-12-18 19:34:19,938 INFO L226 Difference]: Without dead ends: 223 [2019-12-18 19:34:19,938 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2019-12-18 19:34:19,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-18 19:34:19,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 168. [2019-12-18 19:34:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-12-18 19:34:19,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 416 transitions. [2019-12-18 19:34:19,943 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 416 transitions. Word has length 13 [2019-12-18 19:34:19,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:19,943 INFO L462 AbstractCegarLoop]: Abstraction has 168 states and 416 transitions. [2019-12-18 19:34:19,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:19,944 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 416 transitions. [2019-12-18 19:34:19,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:19,944 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:19,944 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:20,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:20,146 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:20,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:20,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118035, now seen corresponding path program 41 times [2019-12-18 19:34:20,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:20,147 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745567183] [2019-12-18 19:34:20,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:20,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:20,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745567183] [2019-12-18 19:34:20,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800723527] [2019-12-18 19:34:20,256 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:20,318 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:34:20,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:20,319 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:20,320 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:20,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:20,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:20,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133123004] [2019-12-18 19:34:20,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:20,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:20,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:20,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:20,460 INFO L87 Difference]: Start difference. First operand 168 states and 416 transitions. Second operand 16 states. [2019-12-18 19:34:20,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:20,734 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2019-12-18 19:34:20,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 19:34:20,740 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:20,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:20,741 INFO L225 Difference]: With dead ends: 182 [2019-12-18 19:34:20,741 INFO L226 Difference]: Without dead ends: 174 [2019-12-18 19:34:20,742 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2019-12-18 19:34:20,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-12-18 19:34:20,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 168. [2019-12-18 19:34:20,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-12-18 19:34:20,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 410 transitions. [2019-12-18 19:34:20,746 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 410 transitions. Word has length 13 [2019-12-18 19:34:20,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:20,746 INFO L462 AbstractCegarLoop]: Abstraction has 168 states and 410 transitions. [2019-12-18 19:34:20,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:20,746 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 410 transitions. [2019-12-18 19:34:20,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:20,747 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:20,747 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:20,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:20,950 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:20,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:20,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1571266990, now seen corresponding path program 42 times [2019-12-18 19:34:20,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:20,952 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658084302] [2019-12-18 19:34:20,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:21,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658084302] [2019-12-18 19:34:21,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539820430] [2019-12-18 19:34:21,040 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:21,087 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:34:21,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:21,088 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:21,089 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:21,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:21,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:21,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737754997] [2019-12-18 19:34:21,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:21,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:21,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:21,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:21,259 INFO L87 Difference]: Start difference. First operand 168 states and 410 transitions. Second operand 16 states. [2019-12-18 19:34:21,720 WARN L192 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-18 19:34:22,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:22,188 INFO L93 Difference]: Finished difference Result 232 states and 528 transitions. [2019-12-18 19:34:22,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 19:34:22,189 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:22,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:22,191 INFO L225 Difference]: With dead ends: 232 [2019-12-18 19:34:22,191 INFO L226 Difference]: Without dead ends: 227 [2019-12-18 19:34:22,191 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2019-12-18 19:34:22,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-18 19:34:22,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 170. [2019-12-18 19:34:22,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-12-18 19:34:22,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 417 transitions. [2019-12-18 19:34:22,196 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 417 transitions. Word has length 13 [2019-12-18 19:34:22,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:22,196 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 417 transitions. [2019-12-18 19:34:22,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:22,196 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 417 transitions. [2019-12-18 19:34:22,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:22,197 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:22,197 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:22,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:22,400 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:22,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:22,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1571267145, now seen corresponding path program 43 times [2019-12-18 19:34:22,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:22,401 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69322494] [2019-12-18 19:34:22,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:22,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:22,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69322494] [2019-12-18 19:34:22,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594618011] [2019-12-18 19:34:22,489 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:22,560 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:22,561 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:23,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:23,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:23,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:23,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574817669] [2019-12-18 19:34:23,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:23,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:23,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:23,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:23,393 INFO L87 Difference]: Start difference. First operand 170 states and 417 transitions. Second operand 16 states. [2019-12-18 19:34:24,637 WARN L192 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2019-12-18 19:34:24,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:24,697 INFO L93 Difference]: Finished difference Result 257 states and 585 transitions. [2019-12-18 19:34:24,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 19:34:24,697 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:24,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:24,699 INFO L225 Difference]: With dead ends: 257 [2019-12-18 19:34:24,699 INFO L226 Difference]: Without dead ends: 255 [2019-12-18 19:34:24,700 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2019-12-18 19:34:24,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2019-12-18 19:34:24,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 174. [2019-12-18 19:34:24,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-12-18 19:34:24,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 433 transitions. [2019-12-18 19:34:24,704 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 433 transitions. Word has length 13 [2019-12-18 19:34:24,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:24,704 INFO L462 AbstractCegarLoop]: Abstraction has 174 states and 433 transitions. [2019-12-18 19:34:24,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:24,705 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 433 transitions. [2019-12-18 19:34:24,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:24,705 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:24,705 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:24,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:24,908 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:24,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:24,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1571271795, now seen corresponding path program 44 times [2019-12-18 19:34:24,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:24,909 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854782836] [2019-12-18 19:34:24,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:25,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854782836] [2019-12-18 19:34:25,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174704315] [2019-12-18 19:34:25,014 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:25,078 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:34:25,078 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:25,079 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:25,080 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:26,191 WARN L192 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 19:34:26,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:26,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:26,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:26,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299733464] [2019-12-18 19:34:26,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:26,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:26,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:26,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:26,193 INFO L87 Difference]: Start difference. First operand 174 states and 433 transitions. Second operand 16 states. [2019-12-18 19:34:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:26,845 INFO L93 Difference]: Finished difference Result 258 states and 586 transitions. [2019-12-18 19:34:26,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:34:26,846 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:26,848 INFO L225 Difference]: With dead ends: 258 [2019-12-18 19:34:26,848 INFO L226 Difference]: Without dead ends: 256 [2019-12-18 19:34:26,848 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2019-12-18 19:34:26,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-12-18 19:34:26,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 176. [2019-12-18 19:34:26,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-12-18 19:34:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 441 transitions. [2019-12-18 19:34:26,852 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 441 transitions. Word has length 13 [2019-12-18 19:34:26,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:26,852 INFO L462 AbstractCegarLoop]: Abstraction has 176 states and 441 transitions. [2019-12-18 19:34:26,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:26,852 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 441 transitions. [2019-12-18 19:34:26,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:26,853 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:26,853 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:27,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:27,054 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:27,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:27,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735640, now seen corresponding path program 45 times [2019-12-18 19:34:27,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:27,055 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154179003] [2019-12-18 19:34:27,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:27,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:27,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154179003] [2019-12-18 19:34:27,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027760643] [2019-12-18 19:34:27,140 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:27,184 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 19:34:27,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:27,184 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:27,185 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:27,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:27,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:27,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407699852] [2019-12-18 19:34:27,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:27,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:27,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:27,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:27,277 INFO L87 Difference]: Start difference. First operand 176 states and 441 transitions. Second operand 16 states. [2019-12-18 19:34:27,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:27,687 INFO L93 Difference]: Finished difference Result 241 states and 555 transitions. [2019-12-18 19:34:27,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 19:34:27,687 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:27,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:27,689 INFO L225 Difference]: With dead ends: 241 [2019-12-18 19:34:27,689 INFO L226 Difference]: Without dead ends: 231 [2019-12-18 19:34:27,689 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=287, Invalid=705, Unknown=0, NotChecked=0, Total=992 [2019-12-18 19:34:27,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-12-18 19:34:27,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 176. [2019-12-18 19:34:27,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-12-18 19:34:27,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 437 transitions. [2019-12-18 19:34:27,693 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 437 transitions. Word has length 13 [2019-12-18 19:34:27,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:27,693 INFO L462 AbstractCegarLoop]: Abstraction has 176 states and 437 transitions. [2019-12-18 19:34:27,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:27,693 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 437 transitions. [2019-12-18 19:34:27,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:27,694 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:27,694 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:27,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:27,897 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:27,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:27,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735795, now seen corresponding path program 46 times [2019-12-18 19:34:27,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:27,898 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465520768] [2019-12-18 19:34:27,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:27,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465520768] [2019-12-18 19:34:27,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104228464] [2019-12-18 19:34:27,977 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:28,031 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:34:28,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:28,032 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:28,033 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:28,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:28,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:28,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:28,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000053729] [2019-12-18 19:34:28,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:28,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:28,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:28,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:28,151 INFO L87 Difference]: Start difference. First operand 176 states and 437 transitions. Second operand 16 states. [2019-12-18 19:34:28,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:28,527 INFO L93 Difference]: Finished difference Result 258 states and 590 transitions. [2019-12-18 19:34:28,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:34:28,528 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:28,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:28,530 INFO L225 Difference]: With dead ends: 258 [2019-12-18 19:34:28,530 INFO L226 Difference]: Without dead ends: 256 [2019-12-18 19:34:28,531 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2019-12-18 19:34:28,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-12-18 19:34:28,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 176. [2019-12-18 19:34:28,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-12-18 19:34:28,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 437 transitions. [2019-12-18 19:34:28,534 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 437 transitions. Word has length 13 [2019-12-18 19:34:28,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:28,535 INFO L462 AbstractCegarLoop]: Abstraction has 176 states and 437 transitions. [2019-12-18 19:34:28,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:28,535 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 437 transitions. [2019-12-18 19:34:28,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:28,536 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:28,536 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:28,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:28,739 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:28,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:28,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740445, now seen corresponding path program 47 times [2019-12-18 19:34:28,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:28,740 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329438716] [2019-12-18 19:34:28,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:28,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329438716] [2019-12-18 19:34:28,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016745982] [2019-12-18 19:34:28,823 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:28,878 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:34:28,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:28,879 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:28,880 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:29,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:29,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:29,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265997160] [2019-12-18 19:34:29,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:29,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:29,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:29,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:29,009 INFO L87 Difference]: Start difference. First operand 176 states and 437 transitions. Second operand 16 states. [2019-12-18 19:34:29,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:29,301 INFO L93 Difference]: Finished difference Result 258 states and 585 transitions. [2019-12-18 19:34:29,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 19:34:29,302 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:29,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:29,304 INFO L225 Difference]: With dead ends: 258 [2019-12-18 19:34:29,304 INFO L226 Difference]: Without dead ends: 256 [2019-12-18 19:34:29,305 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2019-12-18 19:34:29,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-12-18 19:34:29,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 175. [2019-12-18 19:34:29,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-12-18 19:34:29,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 434 transitions. [2019-12-18 19:34:29,309 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 434 transitions. Word has length 13 [2019-12-18 19:34:29,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:29,309 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 434 transitions. [2019-12-18 19:34:29,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:29,310 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 434 transitions. [2019-12-18 19:34:29,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:29,310 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:29,310 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:29,513 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:29,514 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:29,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:29,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740600, now seen corresponding path program 48 times [2019-12-18 19:34:29,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:29,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731822139] [2019-12-18 19:34:29,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:29,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731822139] [2019-12-18 19:34:29,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163603181] [2019-12-18 19:34:29,610 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:29,654 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:34:29,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:29,655 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:29,655 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:29,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:29,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:29,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924799271] [2019-12-18 19:34:29,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:29,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:29,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:29,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:29,752 INFO L87 Difference]: Start difference. First operand 175 states and 434 transitions. Second operand 16 states. [2019-12-18 19:34:30,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:30,120 INFO L93 Difference]: Finished difference Result 249 states and 566 transitions. [2019-12-18 19:34:30,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 19:34:30,120 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:30,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:30,122 INFO L225 Difference]: With dead ends: 249 [2019-12-18 19:34:30,123 INFO L226 Difference]: Without dead ends: 242 [2019-12-18 19:34:30,123 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2019-12-18 19:34:30,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-12-18 19:34:30,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 173. [2019-12-18 19:34:30,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-12-18 19:34:30,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 423 transitions. [2019-12-18 19:34:30,128 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 423 transitions. Word has length 13 [2019-12-18 19:34:30,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:30,128 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 423 transitions. [2019-12-18 19:34:30,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:30,129 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 423 transitions. [2019-12-18 19:34:30,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:30,129 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:30,129 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:30,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:30,332 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:30,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:30,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1575884595, now seen corresponding path program 49 times [2019-12-18 19:34:30,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:30,333 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158253601] [2019-12-18 19:34:30,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:30,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158253601] [2019-12-18 19:34:30,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652354120] [2019-12-18 19:34:30,413 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:30,455 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:30,456 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:30,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:30,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:30,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366664470] [2019-12-18 19:34:30,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:30,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:30,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:30,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:30,568 INFO L87 Difference]: Start difference. First operand 173 states and 423 transitions. Second operand 16 states. [2019-12-18 19:34:31,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:31,007 INFO L93 Difference]: Finished difference Result 240 states and 544 transitions. [2019-12-18 19:34:31,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:34:31,008 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:31,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:31,010 INFO L225 Difference]: With dead ends: 240 [2019-12-18 19:34:31,010 INFO L226 Difference]: Without dead ends: 238 [2019-12-18 19:34:31,011 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=254, Invalid=616, Unknown=0, NotChecked=0, Total=870 [2019-12-18 19:34:31,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-12-18 19:34:31,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 169. [2019-12-18 19:34:31,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-12-18 19:34:31,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 409 transitions. [2019-12-18 19:34:31,015 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 409 transitions. Word has length 13 [2019-12-18 19:34:31,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:31,015 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 409 transitions. [2019-12-18 19:34:31,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:31,015 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 409 transitions. [2019-12-18 19:34:31,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:31,016 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:31,016 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:31,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:31,219 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:31,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:31,219 INFO L82 PathProgramCache]: Analyzing trace with hash -573260427, now seen corresponding path program 50 times [2019-12-18 19:34:31,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:31,220 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359604355] [2019-12-18 19:34:31,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:31,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:31,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359604355] [2019-12-18 19:34:31,309 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312587489] [2019-12-18 19:34:31,309 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:31,365 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:34:31,365 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:31,365 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:31,366 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:31,497 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:31,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:31,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:31,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173928582] [2019-12-18 19:34:31,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:31,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:31,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:31,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:31,498 INFO L87 Difference]: Start difference. First operand 169 states and 409 transitions. Second operand 16 states. [2019-12-18 19:34:31,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:31,794 INFO L93 Difference]: Finished difference Result 180 states and 419 transitions. [2019-12-18 19:34:31,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 19:34:31,794 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:31,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:31,796 INFO L225 Difference]: With dead ends: 180 [2019-12-18 19:34:31,796 INFO L226 Difference]: Without dead ends: 178 [2019-12-18 19:34:31,797 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2019-12-18 19:34:31,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-18 19:34:31,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 161. [2019-12-18 19:34:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-18 19:34:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 393 transitions. [2019-12-18 19:34:31,800 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 393 transitions. Word has length 13 [2019-12-18 19:34:31,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:31,801 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 393 transitions. [2019-12-18 19:34:31,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:31,801 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 393 transitions. [2019-12-18 19:34:31,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:31,801 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:31,801 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:32,001 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:32,002 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:32,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:32,002 INFO L82 PathProgramCache]: Analyzing trace with hash -573265232, now seen corresponding path program 51 times [2019-12-18 19:34:32,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:32,003 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425278151] [2019-12-18 19:34:32,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:32,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:32,099 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425278151] [2019-12-18 19:34:32,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562322313] [2019-12-18 19:34:32,100 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:32,146 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 19:34:32,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:32,147 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 19:34:32,148 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:32,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:32,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:32,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:32,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132096285] [2019-12-18 19:34:32,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:32,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:32,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:32,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:32,246 INFO L87 Difference]: Start difference. First operand 161 states and 393 transitions. Second operand 16 states. [2019-12-18 19:34:32,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:32,457 INFO L93 Difference]: Finished difference Result 191 states and 438 transitions. [2019-12-18 19:34:32,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 19:34:32,458 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:32,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:32,460 INFO L225 Difference]: With dead ends: 191 [2019-12-18 19:34:32,460 INFO L226 Difference]: Without dead ends: 190 [2019-12-18 19:34:32,460 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2019-12-18 19:34:32,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-12-18 19:34:32,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 160. [2019-12-18 19:34:32,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-12-18 19:34:32,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2019-12-18 19:34:32,465 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 13 [2019-12-18 19:34:32,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:32,465 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2019-12-18 19:34:32,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:32,465 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2019-12-18 19:34:32,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:32,466 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:32,466 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:32,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:32,669 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:32,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:32,670 INFO L82 PathProgramCache]: Analyzing trace with hash -573414187, now seen corresponding path program 52 times [2019-12-18 19:34:32,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:32,670 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013573262] [2019-12-18 19:34:32,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:32,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013573262] [2019-12-18 19:34:32,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467712491] [2019-12-18 19:34:32,753 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:32,794 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:34:32,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:32,795 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:32,796 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:32,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:32,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:32,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347388303] [2019-12-18 19:34:32,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:32,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:32,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:32,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:32,908 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 16 states. [2019-12-18 19:34:33,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:33,281 INFO L93 Difference]: Finished difference Result 194 states and 441 transitions. [2019-12-18 19:34:33,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 19:34:33,282 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:33,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:33,283 INFO L225 Difference]: With dead ends: 194 [2019-12-18 19:34:33,283 INFO L226 Difference]: Without dead ends: 192 [2019-12-18 19:34:33,284 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2019-12-18 19:34:33,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-12-18 19:34:33,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 156. [2019-12-18 19:34:33,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 19:34:33,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 376 transitions. [2019-12-18 19:34:33,288 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 376 transitions. Word has length 13 [2019-12-18 19:34:33,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:33,289 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 376 transitions. [2019-12-18 19:34:33,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:33,289 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 376 transitions. [2019-12-18 19:34:33,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:33,289 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:33,290 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:33,492 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:33,493 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:33,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:33,493 INFO L82 PathProgramCache]: Analyzing trace with hash -716554982, now seen corresponding path program 53 times [2019-12-18 19:34:33,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:33,494 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763335399] [2019-12-18 19:34:33,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:33,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763335399] [2019-12-18 19:34:33,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601003767] [2019-12-18 19:34:33,570 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:33,615 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:34:33,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:33,617 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:33,617 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:33,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:33,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:33,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778696365] [2019-12-18 19:34:33,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:33,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:33,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:33,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:33,722 INFO L87 Difference]: Start difference. First operand 156 states and 376 transitions. Second operand 16 states. [2019-12-18 19:34:34,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:34,096 INFO L93 Difference]: Finished difference Result 218 states and 481 transitions. [2019-12-18 19:34:34,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 19:34:34,097 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:34,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:34,099 INFO L225 Difference]: With dead ends: 218 [2019-12-18 19:34:34,099 INFO L226 Difference]: Without dead ends: 217 [2019-12-18 19:34:34,099 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2019-12-18 19:34:34,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-12-18 19:34:34,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 154. [2019-12-18 19:34:34,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 19:34:34,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 367 transitions. [2019-12-18 19:34:34,104 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 367 transitions. Word has length 13 [2019-12-18 19:34:34,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:34,105 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 367 transitions. [2019-12-18 19:34:34,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:34,105 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 367 transitions. [2019-12-18 19:34:34,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:34,105 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:34,105 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:34,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:34,309 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:34,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:34,309 INFO L82 PathProgramCache]: Analyzing trace with hash -716555137, now seen corresponding path program 54 times [2019-12-18 19:34:34,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:34,310 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321061434] [2019-12-18 19:34:34,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:34,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321061434] [2019-12-18 19:34:34,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813607574] [2019-12-18 19:34:34,384 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:34,430 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:34:34,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:34,431 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:34,432 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:34,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:34,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:34,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801914176] [2019-12-18 19:34:34,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:34,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:34,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:34,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:34,524 INFO L87 Difference]: Start difference. First operand 154 states and 367 transitions. Second operand 16 states. [2019-12-18 19:34:34,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:34,831 INFO L93 Difference]: Finished difference Result 231 states and 505 transitions. [2019-12-18 19:34:34,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 19:34:34,832 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:34,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:34,833 INFO L225 Difference]: With dead ends: 231 [2019-12-18 19:34:34,834 INFO L226 Difference]: Without dead ends: 229 [2019-12-18 19:34:34,834 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2019-12-18 19:34:34,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-12-18 19:34:34,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 152. [2019-12-18 19:34:34,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 19:34:34,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 359 transitions. [2019-12-18 19:34:34,843 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 359 transitions. Word has length 13 [2019-12-18 19:34:34,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:34,844 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 359 transitions. [2019-12-18 19:34:34,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:34,844 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 359 transitions. [2019-12-18 19:34:34,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:34,844 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:34,844 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:35,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:35,048 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:35,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:35,048 INFO L82 PathProgramCache]: Analyzing trace with hash -716559787, now seen corresponding path program 55 times [2019-12-18 19:34:35,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:35,049 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460014455] [2019-12-18 19:34:35,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:35,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460014455] [2019-12-18 19:34:35,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110744034] [2019-12-18 19:34:35,125 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:35,169 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:35,169 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:35,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:35,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:35,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431842228] [2019-12-18 19:34:35,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:35,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:35,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:35,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:35,297 INFO L87 Difference]: Start difference. First operand 152 states and 359 transitions. Second operand 16 states. [2019-12-18 19:34:35,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:35,934 INFO L93 Difference]: Finished difference Result 225 states and 480 transitions. [2019-12-18 19:34:35,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:34:35,935 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:35,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:35,937 INFO L225 Difference]: With dead ends: 225 [2019-12-18 19:34:35,937 INFO L226 Difference]: Without dead ends: 223 [2019-12-18 19:34:35,938 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2019-12-18 19:34:35,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-18 19:34:35,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 145. [2019-12-18 19:34:35,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 19:34:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 330 transitions. [2019-12-18 19:34:35,944 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 330 transitions. Word has length 13 [2019-12-18 19:34:35,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:35,944 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 330 transitions. [2019-12-18 19:34:35,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:35,945 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 330 transitions. [2019-12-18 19:34:35,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:35,945 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:35,946 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:36,149 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:36,150 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:36,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:36,150 INFO L82 PathProgramCache]: Analyzing trace with hash -721177547, now seen corresponding path program 56 times [2019-12-18 19:34:36,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:36,151 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239954148] [2019-12-18 19:34:36,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:36,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239954148] [2019-12-18 19:34:36,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367376778] [2019-12-18 19:34:36,232 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:36,285 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:34:36,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:36,286 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:36,287 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:36,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:36,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:36,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731907652] [2019-12-18 19:34:36,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:36,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:36,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:36,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:36,380 INFO L87 Difference]: Start difference. First operand 145 states and 330 transitions. Second operand 16 states. [2019-12-18 19:34:36,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:36,651 INFO L93 Difference]: Finished difference Result 156 states and 335 transitions. [2019-12-18 19:34:36,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 19:34:36,651 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:36,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:36,652 INFO L225 Difference]: With dead ends: 156 [2019-12-18 19:34:36,653 INFO L226 Difference]: Without dead ends: 146 [2019-12-18 19:34:36,653 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2019-12-18 19:34:36,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-18 19:34:36,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 137. [2019-12-18 19:34:36,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-18 19:34:36,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 299 transitions. [2019-12-18 19:34:36,657 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 299 transitions. Word has length 13 [2019-12-18 19:34:36,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:36,657 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 299 transitions. [2019-12-18 19:34:36,657 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:36,657 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 299 transitions. [2019-12-18 19:34:36,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:34:36,657 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:36,658 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:36,858 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:36,858 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:36,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:36,859 INFO L82 PathProgramCache]: Analyzing trace with hash 801705142, now seen corresponding path program 57 times [2019-12-18 19:34:36,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:36,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062221563] [2019-12-18 19:34:36,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:36,969 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062221563] [2019-12-18 19:34:36,969 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786165790] [2019-12-18 19:34:36,969 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:37,024 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 19:34:37,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:37,026 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 19:34:37,027 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:37,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:37,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:37,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:34:37,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964547736] [2019-12-18 19:34:37,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:34:37,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:37,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:34:37,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:34:37,164 INFO L87 Difference]: Start difference. First operand 137 states and 299 transitions. Second operand 18 states. [2019-12-18 19:34:37,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:37,469 INFO L93 Difference]: Finished difference Result 178 states and 378 transitions. [2019-12-18 19:34:37,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 19:34:37,470 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:34:37,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:37,471 INFO L225 Difference]: With dead ends: 178 [2019-12-18 19:34:37,472 INFO L226 Difference]: Without dead ends: 176 [2019-12-18 19:34:37,472 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2019-12-18 19:34:37,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-18 19:34:37,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 137. [2019-12-18 19:34:37,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-18 19:34:37,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 301 transitions. [2019-12-18 19:34:37,475 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 301 transitions. Word has length 14 [2019-12-18 19:34:37,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:37,476 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 301 transitions. [2019-12-18 19:34:37,476 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:34:37,476 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 301 transitions. [2019-12-18 19:34:37,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:34:37,476 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:37,476 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:37,679 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:37,680 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:37,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:37,680 INFO L82 PathProgramCache]: Analyzing trace with hash 802747827, now seen corresponding path program 58 times [2019-12-18 19:34:37,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:37,681 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927216003] [2019-12-18 19:34:37,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:37,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927216003] [2019-12-18 19:34:37,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675771562] [2019-12-18 19:34:37,764 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:37,808 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:34:37,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:37,809 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:34:37,809 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:37,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:37,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:37,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:34:37,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049853301] [2019-12-18 19:34:37,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:34:37,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:37,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:34:37,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:34:37,956 INFO L87 Difference]: Start difference. First operand 137 states and 301 transitions. Second operand 18 states. [2019-12-18 19:34:38,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:38,385 INFO L93 Difference]: Finished difference Result 178 states and 381 transitions. [2019-12-18 19:34:38,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 19:34:38,386 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:34:38,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:38,387 INFO L225 Difference]: With dead ends: 178 [2019-12-18 19:34:38,387 INFO L226 Difference]: Without dead ends: 177 [2019-12-18 19:34:38,388 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2019-12-18 19:34:38,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-18 19:34:38,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 140. [2019-12-18 19:34:38,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 19:34:38,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 312 transitions. [2019-12-18 19:34:38,391 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 312 transitions. Word has length 14 [2019-12-18 19:34:38,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:38,391 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 312 transitions. [2019-12-18 19:34:38,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:34:38,391 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 312 transitions. [2019-12-18 19:34:38,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:34:38,392 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:38,392 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:38,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:38,594 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:38,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:38,595 INFO L82 PathProgramCache]: Analyzing trace with hash 802747672, now seen corresponding path program 59 times [2019-12-18 19:34:38,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:38,595 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407657778] [2019-12-18 19:34:38,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:38,708 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407657778] [2019-12-18 19:34:38,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372786970] [2019-12-18 19:34:38,709 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:38,776 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:34:38,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:38,778 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:34:38,779 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:40,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:40,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:34:40,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668480419] [2019-12-18 19:34:40,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:34:40,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:40,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:34:40,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=231, Unknown=2, NotChecked=0, Total=306 [2019-12-18 19:34:40,177 INFO L87 Difference]: Start difference. First operand 140 states and 312 transitions. Second operand 18 states. [2019-12-18 19:34:41,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:41,112 INFO L93 Difference]: Finished difference Result 200 states and 425 transitions. [2019-12-18 19:34:41,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 19:34:41,112 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:34:41,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:41,114 INFO L225 Difference]: With dead ends: 200 [2019-12-18 19:34:41,114 INFO L226 Difference]: Without dead ends: 197 [2019-12-18 19:34:41,115 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=313, Invalid=677, Unknown=2, NotChecked=0, Total=992 [2019-12-18 19:34:41,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-18 19:34:41,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 140. [2019-12-18 19:34:41,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 19:34:41,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 311 transitions. [2019-12-18 19:34:41,119 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 311 transitions. Word has length 14 [2019-12-18 19:34:41,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:41,119 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 311 transitions. [2019-12-18 19:34:41,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:34:41,119 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 311 transitions. [2019-12-18 19:34:41,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:34:41,120 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:41,120 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:41,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:41,323 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:41,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:41,324 INFO L82 PathProgramCache]: Analyzing trace with hash 802743022, now seen corresponding path program 60 times [2019-12-18 19:34:41,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:41,324 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000933540] [2019-12-18 19:34:41,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:41,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000933540] [2019-12-18 19:34:41,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402538553] [2019-12-18 19:34:41,425 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:41,467 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:34:41,467 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:41,468 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:34:41,469 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:42,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:42,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:34:42,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831498323] [2019-12-18 19:34:42,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:34:42,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:42,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:34:42,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:34:42,910 INFO L87 Difference]: Start difference. First operand 140 states and 311 transitions. Second operand 18 states. [2019-12-18 19:34:43,486 WARN L192 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 19:34:44,201 WARN L192 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-18 19:34:45,388 WARN L192 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-12-18 19:34:45,885 WARN L192 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 19:34:45,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:45,905 INFO L93 Difference]: Finished difference Result 201 states and 427 transitions. [2019-12-18 19:34:45,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 19:34:45,906 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:34:45,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:45,907 INFO L225 Difference]: With dead ends: 201 [2019-12-18 19:34:45,908 INFO L226 Difference]: Without dead ends: 199 [2019-12-18 19:34:45,908 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=307, Invalid=684, Unknown=1, NotChecked=0, Total=992 [2019-12-18 19:34:45,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-18 19:34:45,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 140. [2019-12-18 19:34:45,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 19:34:45,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 311 transitions. [2019-12-18 19:34:45,912 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 311 transitions. Word has length 14 [2019-12-18 19:34:45,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:45,912 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 311 transitions. [2019-12-18 19:34:45,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:34:45,912 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 311 transitions. [2019-12-18 19:34:45,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:34:45,912 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:45,912 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:46,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:46,113 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:46,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:46,114 INFO L82 PathProgramCache]: Analyzing trace with hash 835071062, now seen corresponding path program 61 times [2019-12-18 19:34:46,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:46,114 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033680430] [2019-12-18 19:34:46,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:46,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033680430] [2019-12-18 19:34:46,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111767981] [2019-12-18 19:34:46,206 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:46,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:46,249 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:34:46,249 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:46,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:46,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:34:46,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946999611] [2019-12-18 19:34:46,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:34:46,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:46,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:34:46,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:34:46,384 INFO L87 Difference]: Start difference. First operand 140 states and 311 transitions. Second operand 18 states. [2019-12-18 19:34:46,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:46,864 INFO L93 Difference]: Finished difference Result 184 states and 394 transitions. [2019-12-18 19:34:46,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 19:34:46,865 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:34:46,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:46,866 INFO L225 Difference]: With dead ends: 184 [2019-12-18 19:34:46,866 INFO L226 Difference]: Without dead ends: 175 [2019-12-18 19:34:46,867 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=774, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 19:34:46,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-18 19:34:46,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 149. [2019-12-18 19:34:46,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 19:34:46,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 337 transitions. [2019-12-18 19:34:46,870 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 337 transitions. Word has length 14 [2019-12-18 19:34:46,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:46,870 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 337 transitions. [2019-12-18 19:34:46,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:34:46,870 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 337 transitions. [2019-12-18 19:34:46,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:34:46,871 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:46,871 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:47,071 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:47,072 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:47,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:47,072 INFO L82 PathProgramCache]: Analyzing trace with hash 835070907, now seen corresponding path program 62 times [2019-12-18 19:34:47,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:47,073 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351070718] [2019-12-18 19:34:47,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:47,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:47,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351070718] [2019-12-18 19:34:47,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194016004] [2019-12-18 19:34:47,163 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:47,207 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:34:47,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:47,208 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:34:47,209 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:47,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:47,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:34:47,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138240842] [2019-12-18 19:34:47,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:34:47,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:47,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:34:47,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:34:47,668 INFO L87 Difference]: Start difference. First operand 149 states and 337 transitions. Second operand 18 states. [2019-12-18 19:34:49,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:49,609 INFO L93 Difference]: Finished difference Result 226 states and 480 transitions. [2019-12-18 19:34:49,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:34:49,610 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:34:49,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:49,612 INFO L225 Difference]: With dead ends: 226 [2019-12-18 19:34:49,612 INFO L226 Difference]: Without dead ends: 224 [2019-12-18 19:34:49,612 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=353, Invalid=769, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 19:34:49,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-12-18 19:34:49,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 149. [2019-12-18 19:34:49,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 19:34:49,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 337 transitions. [2019-12-18 19:34:49,616 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 337 transitions. Word has length 14 [2019-12-18 19:34:49,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:49,616 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 337 transitions. [2019-12-18 19:34:49,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:34:49,616 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 337 transitions. [2019-12-18 19:34:49,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:34:49,616 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:49,616 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:49,817 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:49,817 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:49,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:49,818 INFO L82 PathProgramCache]: Analyzing trace with hash 835066257, now seen corresponding path program 63 times [2019-12-18 19:34:49,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:49,818 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882169939] [2019-12-18 19:34:49,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:49,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:49,909 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882169939] [2019-12-18 19:34:49,909 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804810223] [2019-12-18 19:34:49,909 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:49,951 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 19:34:49,951 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:49,952 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:34:49,952 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:52,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:52,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:34:52,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219425583] [2019-12-18 19:34:52,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:34:52,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:52,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:34:52,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:34:52,055 INFO L87 Difference]: Start difference. First operand 149 states and 337 transitions. Second operand 18 states. [2019-12-18 19:34:52,591 WARN L192 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-18 19:34:53,223 WARN L192 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2019-12-18 19:34:53,476 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2019-12-18 19:34:53,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:53,733 INFO L93 Difference]: Finished difference Result 229 states and 487 transitions. [2019-12-18 19:34:53,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 19:34:53,734 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:34:53,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:53,736 INFO L225 Difference]: With dead ends: 229 [2019-12-18 19:34:53,736 INFO L226 Difference]: Without dead ends: 228 [2019-12-18 19:34:53,736 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=350, Invalid=772, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 19:34:53,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2019-12-18 19:34:53,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 150. [2019-12-18 19:34:53,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-18 19:34:53,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 341 transitions. [2019-12-18 19:34:53,740 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 341 transitions. Word has length 14 [2019-12-18 19:34:53,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:53,741 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 341 transitions. [2019-12-18 19:34:53,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:34:53,741 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 341 transitions. [2019-12-18 19:34:53,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:34:53,741 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:53,742 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:53,945 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:53,945 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:53,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:53,945 INFO L82 PathProgramCache]: Analyzing trace with hash 835066102, now seen corresponding path program 64 times [2019-12-18 19:34:53,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:53,945 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137887335] [2019-12-18 19:34:53,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:54,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:54,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137887335] [2019-12-18 19:34:54,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241858238] [2019-12-18 19:34:54,042 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:54,087 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:34:54,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:54,088 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:34:54,089 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:55,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:55,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:34:55,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742172279] [2019-12-18 19:34:55,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:34:55,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:55,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:34:55,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=230, Unknown=2, NotChecked=0, Total=306 [2019-12-18 19:34:55,917 INFO L87 Difference]: Start difference. First operand 150 states and 341 transitions. Second operand 18 states. [2019-12-18 19:34:58,130 WARN L192 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-18 19:34:59,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:59,427 INFO L93 Difference]: Finished difference Result 220 states and 470 transitions. [2019-12-18 19:34:59,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:34:59,428 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:34:59,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:59,430 INFO L225 Difference]: With dead ends: 220 [2019-12-18 19:34:59,430 INFO L226 Difference]: Without dead ends: 216 [2019-12-18 19:34:59,430 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=378, Invalid=808, Unknown=4, NotChecked=0, Total=1190 [2019-12-18 19:34:59,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-12-18 19:34:59,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 149. [2019-12-18 19:34:59,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 19:34:59,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-18 19:34:59,434 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-18 19:34:59,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:59,435 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-18 19:34:59,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:34:59,435 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-18 19:34:59,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:34:59,435 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:59,435 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:59,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:59,637 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:59,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:59,638 INFO L82 PathProgramCache]: Analyzing trace with hash 834922107, now seen corresponding path program 65 times [2019-12-18 19:34:59,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:59,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186181539] [2019-12-18 19:34:59,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:34:59,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186181539] [2019-12-18 19:34:59,770 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670522527] [2019-12-18 19:34:59,770 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:59,836 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:34:59,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:59,838 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:34:59,839 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:35:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:35:04,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:35:04,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:35:04,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073521660] [2019-12-18 19:35:04,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:35:04,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:35:04,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:35:04,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=232, Unknown=1, NotChecked=0, Total=306 [2019-12-18 19:35:04,613 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 18 states. [2019-12-18 19:35:06,406 WARN L192 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2019-12-18 19:35:07,398 WARN L192 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2019-12-18 19:35:08,215 WARN L192 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-18 19:35:08,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:35:08,637 INFO L93 Difference]: Finished difference Result 223 states and 479 transitions. [2019-12-18 19:35:08,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 19:35:08,637 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:35:08,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:35:08,639 INFO L225 Difference]: With dead ends: 223 [2019-12-18 19:35:08,639 INFO L226 Difference]: Without dead ends: 222 [2019-12-18 19:35:08,639 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=282, Invalid=708, Unknown=2, NotChecked=0, Total=992 [2019-12-18 19:35:08,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-18 19:35:08,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 151. [2019-12-18 19:35:08,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-18 19:35:08,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 343 transitions. [2019-12-18 19:35:08,643 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 343 transitions. Word has length 14 [2019-12-18 19:35:08,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:35:08,643 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 343 transitions. [2019-12-18 19:35:08,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:35:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 343 transitions. [2019-12-18 19:35:08,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:35:08,644 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:35:08,644 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:35:08,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:08,847 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:35:08,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:35:08,848 INFO L82 PathProgramCache]: Analyzing trace with hash 834921952, now seen corresponding path program 66 times [2019-12-18 19:35:08,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:35:08,848 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152496672] [2019-12-18 19:35:08,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:35:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:35:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:35:08,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152496672] [2019-12-18 19:35:08,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107162503] [2019-12-18 19:35:08,929 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:08,972 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:35:08,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:35:08,973 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:35:08,973 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:35:09,943 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_237 Int)) (and (<= c_~i~0 (+ c_~j~0 v_~j~0_237 1)) (<= (div (+ (* v_~j~0_237 (- 1)) 1) (- 3)) 1) (<= c_~j~0 (+ (* 2 v_~j~0_237) 1)))) is different from true [2019-12-18 19:35:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2019-12-18 19:35:11,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:35:11,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:35:11,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003853036] [2019-12-18 19:35:11,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:35:11,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:35:11,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:35:11,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=4, NotChecked=30, Total=306 [2019-12-18 19:35:11,349 INFO L87 Difference]: Start difference. First operand 151 states and 343 transitions. Second operand 18 states. [2019-12-18 19:35:12,264 WARN L192 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2019-12-18 19:35:13,386 WARN L192 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-18 19:35:14,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:35:14,929 INFO L93 Difference]: Finished difference Result 225 states and 485 transitions. [2019-12-18 19:35:14,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:35:14,929 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:35:14,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:35:14,931 INFO L225 Difference]: With dead ends: 225 [2019-12-18 19:35:14,931 INFO L226 Difference]: Without dead ends: 220 [2019-12-18 19:35:14,931 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=288, Invalid=640, Unknown=6, NotChecked=58, Total=992 [2019-12-18 19:35:14,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-12-18 19:35:14,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 150. [2019-12-18 19:35:14,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-18 19:35:14,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 339 transitions. [2019-12-18 19:35:14,935 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 339 transitions. Word has length 14 [2019-12-18 19:35:14,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:35:14,935 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 339 transitions. [2019-12-18 19:35:14,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:35:14,935 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 339 transitions. [2019-12-18 19:35:14,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:35:14,935 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:35:14,936 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:35:15,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:15,136 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:35:15,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:35:15,137 INFO L82 PathProgramCache]: Analyzing trace with hash 834917302, now seen corresponding path program 67 times [2019-12-18 19:35:15,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:35:15,137 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195733650] [2019-12-18 19:35:15,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:35:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:35:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:35:15,225 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195733650] [2019-12-18 19:35:15,225 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599152127] [2019-12-18 19:35:15,225 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:35:15,265 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:35:15,265 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:35:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:35:26,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:35:26,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:35:26,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536165789] [2019-12-18 19:35:26,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:35:26,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:35:26,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:35:26,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=230, Unknown=1, NotChecked=0, Total=306 [2019-12-18 19:35:26,472 INFO L87 Difference]: Start difference. First operand 150 states and 339 transitions. Second operand 18 states. [2019-12-18 19:35:27,454 WARN L192 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2019-12-18 19:35:31,525 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-18 19:35:33,568 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-12-18 19:35:34,326 WARN L192 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2019-12-18 19:35:36,827 WARN L192 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-12-18 19:35:39,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:35:39,455 INFO L93 Difference]: Finished difference Result 206 states and 445 transitions. [2019-12-18 19:35:39,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:35:39,456 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:35:39,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:35:39,457 INFO L225 Difference]: With dead ends: 206 [2019-12-18 19:35:39,457 INFO L226 Difference]: Without dead ends: 204 [2019-12-18 19:35:39,458 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=270, Invalid=656, Unknown=4, NotChecked=0, Total=930 [2019-12-18 19:35:39,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-12-18 19:35:39,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 149. [2019-12-18 19:35:39,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 19:35:39,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-18 19:35:39,460 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-18 19:35:39,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:35:39,460 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-18 19:35:39,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:35:39,461 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-18 19:35:39,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:35:39,461 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:35:39,461 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:35:39,661 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:39,662 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:35:39,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:35:39,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086542, now seen corresponding path program 68 times [2019-12-18 19:35:39,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:35:39,663 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720739382] [2019-12-18 19:35:39,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:35:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:35:39,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:35:39,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720739382] [2019-12-18 19:35:39,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394874148] [2019-12-18 19:35:39,752 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:39,810 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:35:39,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:35:39,811 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:35:39,812 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:35:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:35:40,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:35:40,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:35:40,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767206989] [2019-12-18 19:35:40,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:35:40,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:35:40,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:35:40,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:35:40,031 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 18 states. [2019-12-18 19:35:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:35:40,713 INFO L93 Difference]: Finished difference Result 245 states and 526 transitions. [2019-12-18 19:35:40,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 19:35:40,714 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:35:40,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:35:40,716 INFO L225 Difference]: With dead ends: 245 [2019-12-18 19:35:40,716 INFO L226 Difference]: Without dead ends: 241 [2019-12-18 19:35:40,716 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 19:35:40,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-12-18 19:35:40,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 155. [2019-12-18 19:35:40,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-18 19:35:40,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 354 transitions. [2019-12-18 19:35:40,720 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 354 transitions. Word has length 14 [2019-12-18 19:35:40,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:35:40,720 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 354 transitions. [2019-12-18 19:35:40,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:35:40,721 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 354 transitions. [2019-12-18 19:35:40,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:35:40,721 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:35:40,721 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:35:40,921 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:40,922 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:35:40,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:35:40,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086387, now seen corresponding path program 69 times [2019-12-18 19:35:40,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:35:40,923 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332693408] [2019-12-18 19:35:40,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:35:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:35:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:35:41,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332693408] [2019-12-18 19:35:41,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831405979] [2019-12-18 19:35:41,010 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:41,053 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 19:35:41,053 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:35:41,055 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:35:41,056 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:35:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:35:41,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:35:41,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:35:41,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246102569] [2019-12-18 19:35:41,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:35:41,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:35:41,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:35:41,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:35:41,240 INFO L87 Difference]: Start difference. First operand 155 states and 354 transitions. Second operand 18 states. [2019-12-18 19:35:41,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:35:41,917 INFO L93 Difference]: Finished difference Result 237 states and 509 transitions. [2019-12-18 19:35:41,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 19:35:41,918 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:35:41,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:35:41,920 INFO L225 Difference]: With dead ends: 237 [2019-12-18 19:35:41,920 INFO L226 Difference]: Without dead ends: 235 [2019-12-18 19:35:41,920 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=344, Invalid=778, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 19:35:41,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-18 19:35:41,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 153. [2019-12-18 19:35:41,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-18 19:35:41,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 347 transitions. [2019-12-18 19:35:41,925 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 347 transitions. Word has length 14 [2019-12-18 19:35:41,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:35:41,925 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 347 transitions. [2019-12-18 19:35:41,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:35:41,926 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 347 transitions. [2019-12-18 19:35:41,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:35:41,926 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:35:41,926 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:35:42,129 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:42,129 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:35:42,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:35:42,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942392, now seen corresponding path program 70 times [2019-12-18 19:35:42,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:35:42,131 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308032934] [2019-12-18 19:35:42,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:35:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:35:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:35:42,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308032934] [2019-12-18 19:35:42,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040532089] [2019-12-18 19:35:42,216 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:42,265 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:35:42,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:35:42,266 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:35:42,266 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:35:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:35:42,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:35:42,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:35:42,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239967926] [2019-12-18 19:35:42,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:35:42,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:35:42,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:35:42,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:35:42,474 INFO L87 Difference]: Start difference. First operand 153 states and 347 transitions. Second operand 18 states. [2019-12-18 19:35:43,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:35:43,636 INFO L93 Difference]: Finished difference Result 245 states and 527 transitions. [2019-12-18 19:35:43,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:35:43,636 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:35:43,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:35:43,638 INFO L225 Difference]: With dead ends: 245 [2019-12-18 19:35:43,638 INFO L226 Difference]: Without dead ends: 240 [2019-12-18 19:35:43,639 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=289, Invalid=702, Unknown=1, NotChecked=0, Total=992 [2019-12-18 19:35:43,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-12-18 19:35:43,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 157. [2019-12-18 19:35:43,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-18 19:35:43,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 361 transitions. [2019-12-18 19:35:43,643 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 361 transitions. Word has length 14 [2019-12-18 19:35:43,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:35:43,643 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 361 transitions. [2019-12-18 19:35:43,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:35:43,643 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 361 transitions. [2019-12-18 19:35:43,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:35:43,644 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:35:43,644 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:35:43,844 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:43,845 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:35:43,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:35:43,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942237, now seen corresponding path program 71 times [2019-12-18 19:35:43,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:35:43,846 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272145237] [2019-12-18 19:35:43,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:35:43,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:35:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:35:43,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272145237] [2019-12-18 19:35:43,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915095923] [2019-12-18 19:35:43,932 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:43,972 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 19:35:43,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:35:43,974 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:35:43,974 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:35:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:35:44,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:35:44,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:35:44,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001720348] [2019-12-18 19:35:44,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:35:44,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:35:44,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:35:44,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:35:44,182 INFO L87 Difference]: Start difference. First operand 157 states and 361 transitions. Second operand 18 states. [2019-12-18 19:35:45,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:35:45,263 INFO L93 Difference]: Finished difference Result 267 states and 576 transitions. [2019-12-18 19:35:45,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:35:45,263 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:35:45,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:35:45,265 INFO L225 Difference]: With dead ends: 267 [2019-12-18 19:35:45,265 INFO L226 Difference]: Without dead ends: 260 [2019-12-18 19:35:45,266 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2019-12-18 19:35:45,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-12-18 19:35:45,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 158. [2019-12-18 19:35:45,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-18 19:35:45,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 361 transitions. [2019-12-18 19:35:45,270 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 361 transitions. Word has length 14 [2019-12-18 19:35:45,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:35:45,270 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 361 transitions. [2019-12-18 19:35:45,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:35:45,271 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 361 transitions. [2019-12-18 19:35:45,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:35:45,271 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:35:45,271 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:35:45,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:45,474 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:35:45,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:35:45,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1836937587, now seen corresponding path program 72 times [2019-12-18 19:35:45,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:35:45,476 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83644746] [2019-12-18 19:35:45,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:35:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:35:45,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:35:45,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83644746] [2019-12-18 19:35:45,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538731670] [2019-12-18 19:35:45,567 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:45,609 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 19:35:45,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:35:45,610 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:35:45,611 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:35:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:35:49,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:35:49,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:35:49,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116022978] [2019-12-18 19:35:49,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:35:49,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:35:49,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:35:49,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:35:49,885 INFO L87 Difference]: Start difference. First operand 158 states and 361 transitions. Second operand 18 states. [2019-12-18 19:35:52,143 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-18 19:35:52,866 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-12-18 19:35:59,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:35:59,304 INFO L93 Difference]: Finished difference Result 269 states and 580 transitions. [2019-12-18 19:35:59,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-18 19:35:59,304 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:35:59,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:35:59,306 INFO L225 Difference]: With dead ends: 269 [2019-12-18 19:35:59,306 INFO L226 Difference]: Without dead ends: 266 [2019-12-18 19:35:59,307 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=334, Invalid=787, Unknown=1, NotChecked=0, Total=1122 [2019-12-18 19:35:59,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-12-18 19:35:59,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 161. [2019-12-18 19:35:59,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-18 19:35:59,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 374 transitions. [2019-12-18 19:35:59,312 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 374 transitions. Word has length 14 [2019-12-18 19:35:59,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:35:59,312 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 374 transitions. [2019-12-18 19:35:59,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:35:59,312 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 374 transitions. [2019-12-18 19:35:59,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:35:59,313 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:35:59,313 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:35:59,513 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:59,514 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:35:59,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:35:59,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473742, now seen corresponding path program 73 times [2019-12-18 19:35:59,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:35:59,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507868194] [2019-12-18 19:35:59,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:35:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:35:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:35:59,612 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507868194] [2019-12-18 19:35:59,612 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432714333] [2019-12-18 19:35:59,612 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:35:59,656 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:35:59,657 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:35:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:35:59,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:35:59,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:35:59,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803749201] [2019-12-18 19:35:59,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:35:59,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:35:59,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:35:59,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:35:59,889 INFO L87 Difference]: Start difference. First operand 161 states and 374 transitions. Second operand 18 states. [2019-12-18 19:36:00,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:36:00,926 INFO L93 Difference]: Finished difference Result 225 states and 497 transitions. [2019-12-18 19:36:00,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-18 19:36:00,927 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:36:00,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:36:00,929 INFO L225 Difference]: With dead ends: 225 [2019-12-18 19:36:00,929 INFO L226 Difference]: Without dead ends: 224 [2019-12-18 19:36:00,930 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=415, Invalid=1067, Unknown=0, NotChecked=0, Total=1482 [2019-12-18 19:36:00,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-12-18 19:36:00,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 162. [2019-12-18 19:36:00,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-18 19:36:00,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 378 transitions. [2019-12-18 19:36:00,934 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 378 transitions. Word has length 14 [2019-12-18 19:36:00,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:36:00,934 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 378 transitions. [2019-12-18 19:36:00,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:36:00,935 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 378 transitions. [2019-12-18 19:36:00,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:36:00,935 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:36:00,935 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:36:01,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:01,137 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:36:01,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:36:01,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473587, now seen corresponding path program 74 times [2019-12-18 19:36:01,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:36:01,138 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37186602] [2019-12-18 19:36:01,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:36:01,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:36:01,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37186602] [2019-12-18 19:36:01,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658815661] [2019-12-18 19:36:01,240 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:01,279 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:36:01,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:36:01,279 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:36:01,280 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:36:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:36:03,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:36:03,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:36:03,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062113433] [2019-12-18 19:36:03,606 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:36:03,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:36:03,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:36:03,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:36:03,607 INFO L87 Difference]: Start difference. First operand 162 states and 378 transitions. Second operand 18 states. [2019-12-18 19:36:06,213 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-18 19:36:08,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:36:08,705 INFO L93 Difference]: Finished difference Result 248 states and 554 transitions. [2019-12-18 19:36:08,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 19:36:08,705 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:36:08,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:36:08,707 INFO L225 Difference]: With dead ends: 248 [2019-12-18 19:36:08,708 INFO L226 Difference]: Without dead ends: 247 [2019-12-18 19:36:08,708 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=271, Invalid=658, Unknown=1, NotChecked=0, Total=930 [2019-12-18 19:36:08,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-12-18 19:36:08,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 162. [2019-12-18 19:36:08,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-18 19:36:08,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 378 transitions. [2019-12-18 19:36:08,712 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 378 transitions. Word has length 14 [2019-12-18 19:36:08,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:36:08,712 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 378 transitions. [2019-12-18 19:36:08,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:36:08,713 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 378 transitions. [2019-12-18 19:36:08,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:36:08,713 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:36:08,713 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:36:08,916 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:08,916 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:36:08,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:36:08,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468937, now seen corresponding path program 75 times [2019-12-18 19:36:08,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:36:08,917 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254554162] [2019-12-18 19:36:08,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:36:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:09,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:36:09,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254554162] [2019-12-18 19:36:09,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594365834] [2019-12-18 19:36:09,006 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:09,050 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 19:36:09,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:36:09,051 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:36:09,051 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:36:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:36:09,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:36:09,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:36:09,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323239311] [2019-12-18 19:36:09,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:36:09,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:36:09,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:36:09,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:36:09,282 INFO L87 Difference]: Start difference. First operand 162 states and 378 transitions. Second operand 18 states. [2019-12-18 19:36:09,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:36:09,896 INFO L93 Difference]: Finished difference Result 249 states and 559 transitions. [2019-12-18 19:36:09,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:36:09,897 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:36:09,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:36:09,899 INFO L225 Difference]: With dead ends: 249 [2019-12-18 19:36:09,899 INFO L226 Difference]: Without dead ends: 248 [2019-12-18 19:36:09,900 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2019-12-18 19:36:09,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2019-12-18 19:36:09,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 162. [2019-12-18 19:36:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-18 19:36:09,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 378 transitions. [2019-12-18 19:36:09,908 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 378 transitions. Word has length 14 [2019-12-18 19:36:09,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:36:09,908 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 378 transitions. [2019-12-18 19:36:09,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:36:09,908 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 378 transitions. [2019-12-18 19:36:09,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:36:09,909 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:36:09,909 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:36:10,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:10,109 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:36:10,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:36:10,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468782, now seen corresponding path program 76 times [2019-12-18 19:36:10,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:36:10,111 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477381151] [2019-12-18 19:36:10,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:36:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:36:10,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477381151] [2019-12-18 19:36:10,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146726871] [2019-12-18 19:36:10,202 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:10,246 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:36:10,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:36:10,247 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:36:10,247 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:36:10,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:36:10,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:36:10,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:36:10,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165996527] [2019-12-18 19:36:10,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:36:10,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:36:10,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:36:10,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:36:10,537 INFO L87 Difference]: Start difference. First operand 162 states and 378 transitions. Second operand 18 states. [2019-12-18 19:36:11,371 WARN L192 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-12-18 19:36:12,292 WARN L192 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-18 19:36:12,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:36:12,376 INFO L93 Difference]: Finished difference Result 242 states and 528 transitions. [2019-12-18 19:36:12,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-18 19:36:12,377 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:36:12,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:36:12,379 INFO L225 Difference]: With dead ends: 242 [2019-12-18 19:36:12,379 INFO L226 Difference]: Without dead ends: 238 [2019-12-18 19:36:12,379 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=314, Invalid=742, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 19:36:12,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-12-18 19:36:12,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 161. [2019-12-18 19:36:12,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-18 19:36:12,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 374 transitions. [2019-12-18 19:36:12,383 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 374 transitions. Word has length 14 [2019-12-18 19:36:12,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:36:12,383 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 374 transitions. [2019-12-18 19:36:12,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:36:12,384 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 374 transitions. [2019-12-18 19:36:12,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:36:12,384 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:36:12,384 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:36:12,584 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:12,585 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:36:12,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:36:12,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1832324787, now seen corresponding path program 77 times [2019-12-18 19:36:12,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:36:12,586 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082489606] [2019-12-18 19:36:12,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:36:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:36:12,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082489606] [2019-12-18 19:36:12,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292795127] [2019-12-18 19:36:12,671 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:12,716 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:36:12,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:36:12,717 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:36:12,718 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:36:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:36:17,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:36:17,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:36:17,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415139860] [2019-12-18 19:36:17,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:36:17,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:36:17,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:36:17,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:36:17,020 INFO L87 Difference]: Start difference. First operand 161 states and 374 transitions. Second operand 18 states. [2019-12-18 19:36:17,232 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2019-12-18 19:36:19,332 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2019-12-18 19:36:19,623 WARN L192 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2019-12-18 19:36:20,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:36:20,411 INFO L93 Difference]: Finished difference Result 236 states and 519 transitions. [2019-12-18 19:36:20,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 19:36:20,411 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:36:20,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:36:20,413 INFO L225 Difference]: With dead ends: 236 [2019-12-18 19:36:20,413 INFO L226 Difference]: Without dead ends: 235 [2019-12-18 19:36:20,413 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=275, Invalid=717, Unknown=0, NotChecked=0, Total=992 [2019-12-18 19:36:20,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-18 19:36:20,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 158. [2019-12-18 19:36:20,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-18 19:36:20,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 365 transitions. [2019-12-18 19:36:20,417 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 365 transitions. Word has length 14 [2019-12-18 19:36:20,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:36:20,418 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 365 transitions. [2019-12-18 19:36:20,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:36:20,418 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 365 transitions. [2019-12-18 19:36:20,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:36:20,418 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:36:20,418 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:36:20,618 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:20,619 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:36:20,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:36:20,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1460018341, now seen corresponding path program 78 times [2019-12-18 19:36:20,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:36:20,620 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849171749] [2019-12-18 19:36:20,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:36:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:36:20,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849171749] [2019-12-18 19:36:20,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034519489] [2019-12-18 19:36:20,712 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:20,758 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 19:36:20,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:36:20,759 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:36:20,760 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:36:20,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:36:20,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:36:20,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:36:20,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129208004] [2019-12-18 19:36:20,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:36:20,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:36:20,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:36:20,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:36:20,920 INFO L87 Difference]: Start difference. First operand 158 states and 365 transitions. Second operand 18 states. [2019-12-18 19:36:21,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:36:21,580 INFO L93 Difference]: Finished difference Result 199 states and 441 transitions. [2019-12-18 19:36:21,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 19:36:21,581 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:36:21,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:36:21,582 INFO L225 Difference]: With dead ends: 199 [2019-12-18 19:36:21,583 INFO L226 Difference]: Without dead ends: 197 [2019-12-18 19:36:21,583 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2019-12-18 19:36:21,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-18 19:36:21,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 159. [2019-12-18 19:36:21,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-18 19:36:21,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 367 transitions. [2019-12-18 19:36:21,588 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 367 transitions. Word has length 14 [2019-12-18 19:36:21,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:36:21,588 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 367 transitions. [2019-12-18 19:36:21,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:36:21,588 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 367 transitions. [2019-12-18 19:36:21,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:36:21,589 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:36:21,589 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:36:21,790 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:21,790 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:36:21,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:36:21,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1460172101, now seen corresponding path program 79 times [2019-12-18 19:36:21,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:36:21,792 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733835852] [2019-12-18 19:36:21,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:36:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:21,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:36:21,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733835852] [2019-12-18 19:36:21,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016317496] [2019-12-18 19:36:21,896 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:21,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:21,944 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:36:21,945 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:36:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:36:22,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:36:22,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:36:22,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386201441] [2019-12-18 19:36:22,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:36:22,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:36:22,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:36:22,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:36:22,085 INFO L87 Difference]: Start difference. First operand 159 states and 367 transitions. Second operand 18 states. [2019-12-18 19:36:22,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:36:22,642 INFO L93 Difference]: Finished difference Result 229 states and 495 transitions. [2019-12-18 19:36:22,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:36:22,642 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:36:22,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:36:22,644 INFO L225 Difference]: With dead ends: 229 [2019-12-18 19:36:22,644 INFO L226 Difference]: Without dead ends: 222 [2019-12-18 19:36:22,644 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=386, Invalid=804, Unknown=0, NotChecked=0, Total=1190 [2019-12-18 19:36:22,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-18 19:36:22,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 157. [2019-12-18 19:36:22,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-18 19:36:22,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 367 transitions. [2019-12-18 19:36:22,649 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 367 transitions. Word has length 14 [2019-12-18 19:36:22,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:36:22,649 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 367 transitions. [2019-12-18 19:36:22,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:36:22,650 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 367 transitions. [2019-12-18 19:36:22,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:36:22,650 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:36:22,650 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:36:22,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:22,853 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:36:22,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:36:22,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635791, now seen corresponding path program 80 times [2019-12-18 19:36:22,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:36:22,854 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257527444] [2019-12-18 19:36:22,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:36:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:22,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:36:22,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257527444] [2019-12-18 19:36:22,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331538952] [2019-12-18 19:36:22,937 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:22,980 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:36:22,981 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:36:22,981 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:36:22,982 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:36:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:36:24,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:36:24,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:36:24,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402266068] [2019-12-18 19:36:24,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:36:24,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:36:24,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:36:24,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=232, Unknown=1, NotChecked=0, Total=306 [2019-12-18 19:36:24,329 INFO L87 Difference]: Start difference. First operand 157 states and 367 transitions. Second operand 18 states. [2019-12-18 19:36:25,767 WARN L192 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-18 19:36:26,292 WARN L192 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2019-12-18 19:36:28,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:36:28,218 INFO L93 Difference]: Finished difference Result 226 states and 494 transitions. [2019-12-18 19:36:28,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-18 19:36:28,219 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:36:28,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:36:28,220 INFO L225 Difference]: With dead ends: 226 [2019-12-18 19:36:28,220 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 19:36:28,220 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=418, Invalid=1061, Unknown=3, NotChecked=0, Total=1482 [2019-12-18 19:36:28,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 19:36:28,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 159. [2019-12-18 19:36:28,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-18 19:36:28,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 372 transitions. [2019-12-18 19:36:28,223 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 372 transitions. Word has length 14 [2019-12-18 19:36:28,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:36:28,224 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 372 transitions. [2019-12-18 19:36:28,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:36:28,224 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 372 transitions. [2019-12-18 19:36:28,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:36:28,224 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:36:28,224 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:36:28,425 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:28,425 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:36:28,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:36:28,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635946, now seen corresponding path program 81 times [2019-12-18 19:36:28,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:36:28,426 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307222834] [2019-12-18 19:36:28,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:36:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:36:28,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307222834] [2019-12-18 19:36:28,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930519822] [2019-12-18 19:36:28,531 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:28,584 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 19:36:28,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:36:28,585 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:36:28,586 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:36:29,383 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 19:36:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:36:36,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:36:36,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:36:36,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068632393] [2019-12-18 19:36:36,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:36:36,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:36:36,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:36:36,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=229, Unknown=2, NotChecked=0, Total=306 [2019-12-18 19:36:36,274 INFO L87 Difference]: Start difference. First operand 159 states and 372 transitions. Second operand 18 states. [2019-12-18 19:36:44,708 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-18 19:36:45,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:36:45,696 INFO L93 Difference]: Finished difference Result 249 states and 544 transitions. [2019-12-18 19:36:45,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 19:36:45,696 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:36:45,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:36:45,699 INFO L225 Difference]: With dead ends: 249 [2019-12-18 19:36:45,699 INFO L226 Difference]: Without dead ends: 246 [2019-12-18 19:36:45,699 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=342, Invalid=846, Unknown=2, NotChecked=0, Total=1190 [2019-12-18 19:36:45,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2019-12-18 19:36:45,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 159. [2019-12-18 19:36:45,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-18 19:36:45,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 372 transitions. [2019-12-18 19:36:45,704 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 372 transitions. Word has length 14 [2019-12-18 19:36:45,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:36:45,704 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 372 transitions. [2019-12-18 19:36:45,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:36:45,704 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 372 transitions. [2019-12-18 19:36:45,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:36:45,704 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:36:45,704 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:36:45,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:45,905 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:36:45,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:36:45,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640596, now seen corresponding path program 82 times [2019-12-18 19:36:45,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:36:45,906 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765250589] [2019-12-18 19:36:45,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:36:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:36:46,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765250589] [2019-12-18 19:36:46,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356925913] [2019-12-18 19:36:46,007 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:46,050 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:36:46,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:36:46,051 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:36:46,051 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:36:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:36:46,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:36:46,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:36:46,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720627164] [2019-12-18 19:36:46,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:36:46,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:36:46,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:36:46,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:36:46,738 INFO L87 Difference]: Start difference. First operand 159 states and 372 transitions. Second operand 18 states. [2019-12-18 19:36:49,255 WARN L192 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-12-18 19:36:50,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:36:50,148 INFO L93 Difference]: Finished difference Result 280 states and 613 transitions. [2019-12-18 19:36:50,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 19:36:50,149 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:36:50,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:36:50,151 INFO L225 Difference]: With dead ends: 280 [2019-12-18 19:36:50,151 INFO L226 Difference]: Without dead ends: 276 [2019-12-18 19:36:50,152 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=293, Invalid=698, Unknown=1, NotChecked=0, Total=992 [2019-12-18 19:36:50,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2019-12-18 19:36:50,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 170. [2019-12-18 19:36:50,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-12-18 19:36:50,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 410 transitions. [2019-12-18 19:36:50,156 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 410 transitions. Word has length 14 [2019-12-18 19:36:50,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:36:50,156 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 410 transitions. [2019-12-18 19:36:50,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:36:50,156 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 410 transitions. [2019-12-18 19:36:50,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:36:50,157 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:36:50,157 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:36:50,360 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:50,360 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:36:50,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:36:50,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640751, now seen corresponding path program 83 times [2019-12-18 19:36:50,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:36:50,361 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679907209] [2019-12-18 19:36:50,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:36:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:50,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:36:50,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679907209] [2019-12-18 19:36:50,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313384695] [2019-12-18 19:36:50,448 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:50,490 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:36:50,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:36:50,491 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:36:50,492 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:36:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:36:52,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:36:52,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:36:52,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693004299] [2019-12-18 19:36:52,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:36:52,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:36:52,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:36:52,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:36:52,257 INFO L87 Difference]: Start difference. First operand 170 states and 410 transitions. Second operand 18 states. [2019-12-18 19:36:52,814 WARN L192 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2019-12-18 19:36:54,293 WARN L192 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-18 19:36:54,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:36:54,316 INFO L93 Difference]: Finished difference Result 280 states and 611 transitions. [2019-12-18 19:36:54,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 19:36:54,317 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:36:54,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:36:54,319 INFO L225 Difference]: With dead ends: 280 [2019-12-18 19:36:54,319 INFO L226 Difference]: Without dead ends: 275 [2019-12-18 19:36:54,320 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=319, Invalid=803, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 19:36:54,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2019-12-18 19:36:54,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 168. [2019-12-18 19:36:54,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-12-18 19:36:54,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 404 transitions. [2019-12-18 19:36:54,324 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 404 transitions. Word has length 14 [2019-12-18 19:36:54,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:36:54,324 INFO L462 AbstractCegarLoop]: Abstraction has 168 states and 404 transitions. [2019-12-18 19:36:54,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:36:54,324 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 404 transitions. [2019-12-18 19:36:54,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:36:54,325 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:36:54,325 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:36:54,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:54,526 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:36:54,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:36:54,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784746, now seen corresponding path program 84 times [2019-12-18 19:36:54,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:36:54,527 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805148551] [2019-12-18 19:36:54,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:36:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:36:54,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805148551] [2019-12-18 19:36:54,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914090511] [2019-12-18 19:36:54,624 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:54,667 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:36:54,668 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:36:54,668 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:36:54,669 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:36:55,355 WARN L192 SmtUtils]: Spent 514.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 19:36:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:36:55,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:36:55,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:36:55,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494649223] [2019-12-18 19:36:55,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:36:55,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:36:55,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:36:55,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:36:55,396 INFO L87 Difference]: Start difference. First operand 168 states and 404 transitions. Second operand 18 states. [2019-12-18 19:36:57,003 WARN L192 SmtUtils]: Spent 999.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-18 19:36:57,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:36:57,117 INFO L93 Difference]: Finished difference Result 270 states and 594 transitions. [2019-12-18 19:36:57,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 19:36:57,117 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:36:57,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:36:57,119 INFO L225 Difference]: With dead ends: 270 [2019-12-18 19:36:57,120 INFO L226 Difference]: Without dead ends: 262 [2019-12-18 19:36:57,120 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=369, Invalid=891, Unknown=0, NotChecked=0, Total=1260 [2019-12-18 19:36:57,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2019-12-18 19:36:57,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 171. [2019-12-18 19:36:57,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-12-18 19:36:57,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 412 transitions. [2019-12-18 19:36:57,123 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 412 transitions. Word has length 14 [2019-12-18 19:36:57,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:36:57,124 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 412 transitions. [2019-12-18 19:36:57,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:36:57,124 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 412 transitions. [2019-12-18 19:36:57,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:36:57,124 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:36:57,124 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:36:57,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:57,325 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:36:57,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:36:57,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784901, now seen corresponding path program 85 times [2019-12-18 19:36:57,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:36:57,326 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904162485] [2019-12-18 19:36:57,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:36:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:57,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:36:57,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904162485] [2019-12-18 19:36:57,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168902083] [2019-12-18 19:36:57,436 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:57,479 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:36:57,479 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:36:58,018 WARN L192 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 19:36:58,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:36:58,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:36:58,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:36:58,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623305160] [2019-12-18 19:36:58,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:36:58,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:36:58,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:36:58,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:36:58,522 INFO L87 Difference]: Start difference. First operand 171 states and 412 transitions. Second operand 18 states. [2019-12-18 19:36:59,076 WARN L192 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2019-12-18 19:36:59,927 WARN L192 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-18 19:37:01,016 WARN L192 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2019-12-18 19:37:01,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:01,729 INFO L93 Difference]: Finished difference Result 276 states and 610 transitions. [2019-12-18 19:37:01,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 19:37:01,729 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:01,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:01,731 INFO L225 Difference]: With dead ends: 276 [2019-12-18 19:37:01,732 INFO L226 Difference]: Without dead ends: 272 [2019-12-18 19:37:01,732 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=410, Invalid=922, Unknown=0, NotChecked=0, Total=1332 [2019-12-18 19:37:01,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2019-12-18 19:37:01,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 169. [2019-12-18 19:37:01,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-12-18 19:37:01,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 406 transitions. [2019-12-18 19:37:01,736 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 406 transitions. Word has length 14 [2019-12-18 19:37:01,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:01,737 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 406 transitions. [2019-12-18 19:37:01,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:01,737 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 406 transitions. [2019-12-18 19:37:01,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:01,737 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:01,737 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:01,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:01,939 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:01,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:01,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1603163941, now seen corresponding path program 86 times [2019-12-18 19:37:01,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:01,940 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108034923] [2019-12-18 19:37:01,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:01,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:02,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108034923] [2019-12-18 19:37:02,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460406911] [2019-12-18 19:37:02,083 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:02,126 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:37:02,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:02,127 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:02,127 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:02,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:02,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:02,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555493218] [2019-12-18 19:37:02,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:02,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:02,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:02,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:02,246 INFO L87 Difference]: Start difference. First operand 169 states and 406 transitions. Second operand 18 states. [2019-12-18 19:37:02,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:02,848 INFO L93 Difference]: Finished difference Result 231 states and 505 transitions. [2019-12-18 19:37:02,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-18 19:37:02,848 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:02,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:02,850 INFO L225 Difference]: With dead ends: 231 [2019-12-18 19:37:02,850 INFO L226 Difference]: Without dead ends: 219 [2019-12-18 19:37:02,851 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=450, Invalid=1190, Unknown=0, NotChecked=0, Total=1640 [2019-12-18 19:37:02,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-12-18 19:37:02,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 171. [2019-12-18 19:37:02,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-12-18 19:37:02,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 408 transitions. [2019-12-18 19:37:02,855 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 408 transitions. Word has length 14 [2019-12-18 19:37:02,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:02,855 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 408 transitions. [2019-12-18 19:37:02,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:02,855 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 408 transitions. [2019-12-18 19:37:02,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:02,856 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:02,856 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:03,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:03,059 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:03,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:03,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1603164096, now seen corresponding path program 87 times [2019-12-18 19:37:03,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:03,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047356327] [2019-12-18 19:37:03,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:03,147 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047356327] [2019-12-18 19:37:03,147 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314828271] [2019-12-18 19:37:03,147 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:03,190 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 19:37:03,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:03,191 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:03,191 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:03,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:03,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:03,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:03,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835824715] [2019-12-18 19:37:03,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:03,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:03,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:03,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:03,312 INFO L87 Difference]: Start difference. First operand 171 states and 408 transitions. Second operand 18 states. [2019-12-18 19:37:03,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:03,916 INFO L93 Difference]: Finished difference Result 269 states and 586 transitions. [2019-12-18 19:37:03,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 19:37:03,916 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:03,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:03,919 INFO L225 Difference]: With dead ends: 269 [2019-12-18 19:37:03,919 INFO L226 Difference]: Without dead ends: 266 [2019-12-18 19:37:03,919 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=960, Unknown=0, NotChecked=0, Total=1332 [2019-12-18 19:37:03,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-12-18 19:37:03,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 171. [2019-12-18 19:37:03,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-12-18 19:37:03,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 408 transitions. [2019-12-18 19:37:03,924 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 408 transitions. Word has length 14 [2019-12-18 19:37:03,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:03,924 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 408 transitions. [2019-12-18 19:37:03,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:03,924 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 408 transitions. [2019-12-18 19:37:03,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:03,924 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:03,924 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:04,125 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:04,125 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:04,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:04,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1603168901, now seen corresponding path program 88 times [2019-12-18 19:37:04,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:04,126 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347102403] [2019-12-18 19:37:04,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:04,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:04,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347102403] [2019-12-18 19:37:04,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029600767] [2019-12-18 19:37:04,220 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:04,263 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:37:04,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:04,264 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:04,264 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:04,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:04,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:04,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457045746] [2019-12-18 19:37:04,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:04,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:04,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:04,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:04,404 INFO L87 Difference]: Start difference. First operand 171 states and 408 transitions. Second operand 18 states. [2019-12-18 19:37:05,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:05,066 INFO L93 Difference]: Finished difference Result 282 states and 615 transitions. [2019-12-18 19:37:05,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 19:37:05,067 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:05,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:05,069 INFO L225 Difference]: With dead ends: 282 [2019-12-18 19:37:05,069 INFO L226 Difference]: Without dead ends: 276 [2019-12-18 19:37:05,070 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2019-12-18 19:37:05,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2019-12-18 19:37:05,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 171. [2019-12-18 19:37:05,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-12-18 19:37:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 408 transitions. [2019-12-18 19:37:05,074 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 408 transitions. Word has length 14 [2019-12-18 19:37:05,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:05,075 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 408 transitions. [2019-12-18 19:37:05,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:05,075 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 408 transitions. [2019-12-18 19:37:05,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:05,075 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:05,075 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:05,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:05,278 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:05,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:05,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1603312896, now seen corresponding path program 89 times [2019-12-18 19:37:05,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:05,280 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935902269] [2019-12-18 19:37:05,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:05,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:05,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935902269] [2019-12-18 19:37:05,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593111996] [2019-12-18 19:37:05,383 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:05,423 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:37:05,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:05,424 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:05,425 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:05,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:05,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:05,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:05,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617271402] [2019-12-18 19:37:05,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:05,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:05,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:05,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:05,542 INFO L87 Difference]: Start difference. First operand 171 states and 408 transitions. Second operand 18 states. [2019-12-18 19:37:06,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:06,021 INFO L93 Difference]: Finished difference Result 275 states and 596 transitions. [2019-12-18 19:37:06,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 19:37:06,021 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:06,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:06,023 INFO L225 Difference]: With dead ends: 275 [2019-12-18 19:37:06,024 INFO L226 Difference]: Without dead ends: 270 [2019-12-18 19:37:06,024 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 19:37:06,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2019-12-18 19:37:06,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 173. [2019-12-18 19:37:06,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-12-18 19:37:06,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 414 transitions. [2019-12-18 19:37:06,027 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 414 transitions. Word has length 14 [2019-12-18 19:37:06,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:06,027 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 414 transitions. [2019-12-18 19:37:06,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:06,028 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 414 transitions. [2019-12-18 19:37:06,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:06,028 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:06,028 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:06,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:06,229 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:06,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:06,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1603313051, now seen corresponding path program 90 times [2019-12-18 19:37:06,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:06,230 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884318764] [2019-12-18 19:37:06,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:06,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:06,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884318764] [2019-12-18 19:37:06,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339383380] [2019-12-18 19:37:06,324 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:06,370 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 19:37:06,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:06,371 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:06,372 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:06,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:06,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:06,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:06,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65081261] [2019-12-18 19:37:06,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:06,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:06,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:06,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:06,498 INFO L87 Difference]: Start difference. First operand 173 states and 414 transitions. Second operand 18 states. [2019-12-18 19:37:06,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:06,870 INFO L93 Difference]: Finished difference Result 276 states and 607 transitions. [2019-12-18 19:37:06,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 19:37:06,870 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:06,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:06,872 INFO L225 Difference]: With dead ends: 276 [2019-12-18 19:37:06,872 INFO L226 Difference]: Without dead ends: 274 [2019-12-18 19:37:06,873 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2019-12-18 19:37:06,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-12-18 19:37:06,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 171. [2019-12-18 19:37:06,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-12-18 19:37:06,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 407 transitions. [2019-12-18 19:37:06,879 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 407 transitions. Word has length 14 [2019-12-18 19:37:06,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:06,879 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 407 transitions. [2019-12-18 19:37:06,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:06,879 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 407 transitions. [2019-12-18 19:37:06,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:06,880 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:06,880 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:07,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:07,083 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:07,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:07,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1603317701, now seen corresponding path program 91 times [2019-12-18 19:37:07,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:07,084 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020288584] [2019-12-18 19:37:07,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:07,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020288584] [2019-12-18 19:37:07,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723715341] [2019-12-18 19:37:07,175 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:07,220 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:07,220 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:07,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:07,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:07,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:07,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406122349] [2019-12-18 19:37:07,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:07,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:07,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:07,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:07,342 INFO L87 Difference]: Start difference. First operand 171 states and 407 transitions. Second operand 18 states. [2019-12-18 19:37:07,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:07,867 INFO L93 Difference]: Finished difference Result 278 states and 603 transitions. [2019-12-18 19:37:07,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 19:37:07,867 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:07,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:07,869 INFO L225 Difference]: With dead ends: 278 [2019-12-18 19:37:07,869 INFO L226 Difference]: Without dead ends: 275 [2019-12-18 19:37:07,869 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 19:37:07,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2019-12-18 19:37:07,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 170. [2019-12-18 19:37:07,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-12-18 19:37:07,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 408 transitions. [2019-12-18 19:37:07,874 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 408 transitions. Word has length 14 [2019-12-18 19:37:07,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:07,874 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 408 transitions. [2019-12-18 19:37:07,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:07,874 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 408 transitions. [2019-12-18 19:37:07,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:07,875 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:07,875 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:08,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:08,078 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:08,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:08,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1607781701, now seen corresponding path program 92 times [2019-12-18 19:37:08,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:08,079 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098186607] [2019-12-18 19:37:08,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:08,171 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098186607] [2019-12-18 19:37:08,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905210508] [2019-12-18 19:37:08,172 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:08,215 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:37:08,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:08,220 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:08,221 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:09,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:09,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:09,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:09,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402027716] [2019-12-18 19:37:09,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:09,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:09,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:09,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:09,850 INFO L87 Difference]: Start difference. First operand 170 states and 408 transitions. Second operand 18 states. [2019-12-18 19:37:11,109 WARN L192 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 19:37:11,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:11,129 INFO L93 Difference]: Finished difference Result 261 states and 574 transitions. [2019-12-18 19:37:11,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 19:37:11,129 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:11,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:11,130 INFO L225 Difference]: With dead ends: 261 [2019-12-18 19:37:11,130 INFO L226 Difference]: Without dead ends: 259 [2019-12-18 19:37:11,131 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=349, Invalid=841, Unknown=0, NotChecked=0, Total=1190 [2019-12-18 19:37:11,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2019-12-18 19:37:11,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 165. [2019-12-18 19:37:11,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-12-18 19:37:11,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 394 transitions. [2019-12-18 19:37:11,135 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 394 transitions. Word has length 14 [2019-12-18 19:37:11,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:11,135 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 394 transitions. [2019-12-18 19:37:11,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:11,135 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 394 transitions. [2019-12-18 19:37:11,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:11,136 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:11,136 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:11,339 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:11,339 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:11,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:11,340 INFO L82 PathProgramCache]: Analyzing trace with hash -591203565, now seen corresponding path program 93 times [2019-12-18 19:37:11,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:11,340 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838833757] [2019-12-18 19:37:11,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:11,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:11,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838833757] [2019-12-18 19:37:11,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204461211] [2019-12-18 19:37:11,459 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:11,504 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 19:37:11,504 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:11,505 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:11,505 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:11,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:11,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:11,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:11,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499535904] [2019-12-18 19:37:11,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:11,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:11,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:11,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:11,635 INFO L87 Difference]: Start difference. First operand 165 states and 394 transitions. Second operand 18 states. [2019-12-18 19:37:12,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:12,074 INFO L93 Difference]: Finished difference Result 196 states and 442 transitions. [2019-12-18 19:37:12,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 19:37:12,075 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:12,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:12,075 INFO L225 Difference]: With dead ends: 196 [2019-12-18 19:37:12,076 INFO L226 Difference]: Without dead ends: 194 [2019-12-18 19:37:12,076 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2019-12-18 19:37:12,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-12-18 19:37:12,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 165. [2019-12-18 19:37:12,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-12-18 19:37:12,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 394 transitions. [2019-12-18 19:37:12,080 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 394 transitions. Word has length 14 [2019-12-18 19:37:12,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:12,080 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 394 transitions. [2019-12-18 19:37:12,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:12,080 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 394 transitions. [2019-12-18 19:37:12,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:12,080 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:12,080 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:12,281 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:12,281 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:12,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:12,282 INFO L82 PathProgramCache]: Analyzing trace with hash -591347715, now seen corresponding path program 94 times [2019-12-18 19:37:12,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:12,282 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256002447] [2019-12-18 19:37:12,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:12,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256002447] [2019-12-18 19:37:12,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033133724] [2019-12-18 19:37:12,394 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:12,438 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:37:12,438 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:12,439 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:12,440 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:14,290 WARN L192 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-18 19:37:14,744 WARN L192 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 19:37:14,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:14,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:14,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:14,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281101730] [2019-12-18 19:37:14,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:14,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:14,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:14,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=232, Unknown=1, NotChecked=0, Total=306 [2019-12-18 19:37:14,746 INFO L87 Difference]: Start difference. First operand 165 states and 394 transitions. Second operand 18 states. [2019-12-18 19:37:15,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:15,940 INFO L93 Difference]: Finished difference Result 217 states and 482 transitions. [2019-12-18 19:37:15,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 19:37:15,940 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:15,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:15,941 INFO L225 Difference]: With dead ends: 217 [2019-12-18 19:37:15,941 INFO L226 Difference]: Without dead ends: 215 [2019-12-18 19:37:15,942 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=304, Invalid=687, Unknown=1, NotChecked=0, Total=992 [2019-12-18 19:37:15,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-18 19:37:15,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 162. [2019-12-18 19:37:15,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-18 19:37:15,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 388 transitions. [2019-12-18 19:37:15,946 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 388 transitions. Word has length 14 [2019-12-18 19:37:15,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:15,946 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 388 transitions. [2019-12-18 19:37:15,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:15,946 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 388 transitions. [2019-12-18 19:37:15,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:15,947 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:15,947 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:16,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:16,147 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:16,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:16,148 INFO L82 PathProgramCache]: Analyzing trace with hash -591352365, now seen corresponding path program 95 times [2019-12-18 19:37:16,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:16,149 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115326022] [2019-12-18 19:37:16,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:16,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:16,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115326022] [2019-12-18 19:37:16,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126295772] [2019-12-18 19:37:16,237 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:16,278 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:37:16,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:16,279 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:16,280 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:16,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:16,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:16,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533016086] [2019-12-18 19:37:16,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:16,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:16,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:16,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:16,452 INFO L87 Difference]: Start difference. First operand 162 states and 388 transitions. Second operand 18 states. [2019-12-18 19:37:17,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:17,439 INFO L93 Difference]: Finished difference Result 210 states and 466 transitions. [2019-12-18 19:37:17,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 19:37:17,439 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:17,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:17,440 INFO L225 Difference]: With dead ends: 210 [2019-12-18 19:37:17,440 INFO L226 Difference]: Without dead ends: 207 [2019-12-18 19:37:17,441 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=313, Invalid=678, Unknown=1, NotChecked=0, Total=992 [2019-12-18 19:37:17,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-18 19:37:17,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 162. [2019-12-18 19:37:17,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-18 19:37:17,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 388 transitions. [2019-12-18 19:37:17,444 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 388 transitions. Word has length 14 [2019-12-18 19:37:17,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:17,445 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 388 transitions. [2019-12-18 19:37:17,445 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:17,445 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 388 transitions. [2019-12-18 19:37:17,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:17,445 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:17,445 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:17,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:17,646 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:17,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:17,646 INFO L82 PathProgramCache]: Analyzing trace with hash -595969970, now seen corresponding path program 96 times [2019-12-18 19:37:17,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:17,647 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639612055] [2019-12-18 19:37:17,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:17,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639612055] [2019-12-18 19:37:17,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502932892] [2019-12-18 19:37:17,734 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:17,773 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:37:17,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:17,774 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:17,774 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:18,107 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 19:37:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:18,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:18,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:18,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501987951] [2019-12-18 19:37:18,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:18,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:18,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:18,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:18,109 INFO L87 Difference]: Start difference. First operand 162 states and 388 transitions. Second operand 18 states. [2019-12-18 19:37:18,844 WARN L192 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 23 [2019-12-18 19:37:19,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:19,140 INFO L93 Difference]: Finished difference Result 231 states and 509 transitions. [2019-12-18 19:37:19,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:37:19,140 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:19,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:19,141 INFO L225 Difference]: With dead ends: 231 [2019-12-18 19:37:19,142 INFO L226 Difference]: Without dead ends: 229 [2019-12-18 19:37:19,142 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=353, Invalid=769, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 19:37:19,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-12-18 19:37:19,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 160. [2019-12-18 19:37:19,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-12-18 19:37:19,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 381 transitions. [2019-12-18 19:37:19,145 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 381 transitions. Word has length 14 [2019-12-18 19:37:19,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:19,145 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 381 transitions. [2019-12-18 19:37:19,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:19,146 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 381 transitions. [2019-12-18 19:37:19,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:19,146 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:19,146 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:19,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:19,347 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:19,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:19,347 INFO L82 PathProgramCache]: Analyzing trace with hash -734498275, now seen corresponding path program 97 times [2019-12-18 19:37:19,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:19,348 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953561951] [2019-12-18 19:37:19,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:19,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953561951] [2019-12-18 19:37:19,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491632144] [2019-12-18 19:37:19,438 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:19,481 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:19,482 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:19,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:19,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:19,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514189978] [2019-12-18 19:37:19,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:19,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:19,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:19,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:19,726 INFO L87 Difference]: Start difference. First operand 160 states and 381 transitions. Second operand 18 states. [2019-12-18 19:37:20,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:20,799 INFO L93 Difference]: Finished difference Result 227 states and 495 transitions. [2019-12-18 19:37:20,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-18 19:37:20,799 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:20,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:20,800 INFO L225 Difference]: With dead ends: 227 [2019-12-18 19:37:20,800 INFO L226 Difference]: Without dead ends: 216 [2019-12-18 19:37:20,801 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=415, Invalid=1067, Unknown=0, NotChecked=0, Total=1482 [2019-12-18 19:37:20,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-12-18 19:37:20,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 155. [2019-12-18 19:37:20,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-18 19:37:20,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 361 transitions. [2019-12-18 19:37:20,804 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 361 transitions. Word has length 14 [2019-12-18 19:37:20,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:20,804 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 361 transitions. [2019-12-18 19:37:20,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:20,804 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 361 transitions. [2019-12-18 19:37:20,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:20,805 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:20,805 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:21,005 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:21,006 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:21,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:21,006 INFO L82 PathProgramCache]: Analyzing trace with hash -733754519, now seen corresponding path program 98 times [2019-12-18 19:37:21,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:21,007 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813619534] [2019-12-18 19:37:21,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:21,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813619534] [2019-12-18 19:37:21,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175620255] [2019-12-18 19:37:21,091 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:21,133 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:37:21,134 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:21,134 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:21,135 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:22,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:22,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:22,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690934471] [2019-12-18 19:37:22,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:22,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:22,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:22,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=231, Unknown=2, NotChecked=0, Total=306 [2019-12-18 19:37:22,066 INFO L87 Difference]: Start difference. First operand 155 states and 361 transitions. Second operand 18 states. [2019-12-18 19:37:23,914 WARN L192 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2019-12-18 19:37:25,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:25,613 INFO L93 Difference]: Finished difference Result 229 states and 491 transitions. [2019-12-18 19:37:25,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-18 19:37:25,613 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:25,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:25,614 INFO L225 Difference]: With dead ends: 229 [2019-12-18 19:37:25,614 INFO L226 Difference]: Without dead ends: 226 [2019-12-18 19:37:25,615 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=375, Invalid=952, Unknown=5, NotChecked=0, Total=1332 [2019-12-18 19:37:25,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-18 19:37:25,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 152. [2019-12-18 19:37:25,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 19:37:25,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 351 transitions. [2019-12-18 19:37:25,618 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 351 transitions. Word has length 14 [2019-12-18 19:37:25,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:25,618 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 351 transitions. [2019-12-18 19:37:25,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:25,618 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 351 transitions. [2019-12-18 19:37:25,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:25,618 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:25,618 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:25,819 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:25,819 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:25,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:25,820 INFO L82 PathProgramCache]: Analyzing trace with hash -738367319, now seen corresponding path program 99 times [2019-12-18 19:37:25,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:25,820 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646732867] [2019-12-18 19:37:25,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:25,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646732867] [2019-12-18 19:37:25,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20014270] [2019-12-18 19:37:25,904 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:25,953 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 19:37:25,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:25,954 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:25,954 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:26,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:26,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:26,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:26,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001242481] [2019-12-18 19:37:26,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:26,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:26,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:26,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:26,097 INFO L87 Difference]: Start difference. First operand 152 states and 351 transitions. Second operand 18 states. [2019-12-18 19:37:26,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:26,601 INFO L93 Difference]: Finished difference Result 222 states and 471 transitions. [2019-12-18 19:37:26,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 19:37:26,602 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:26,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:26,603 INFO L225 Difference]: With dead ends: 222 [2019-12-18 19:37:26,603 INFO L226 Difference]: Without dead ends: 216 [2019-12-18 19:37:26,603 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=338, Invalid=852, Unknown=0, NotChecked=0, Total=1190 [2019-12-18 19:37:26,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-12-18 19:37:26,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 148. [2019-12-18 19:37:26,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-18 19:37:26,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 336 transitions. [2019-12-18 19:37:26,607 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 336 transitions. Word has length 14 [2019-12-18 19:37:26,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:26,607 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 336 transitions. [2019-12-18 19:37:26,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:26,607 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 336 transitions. [2019-12-18 19:37:26,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:26,607 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:26,607 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:26,808 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:26,808 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:26,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:26,809 INFO L82 PathProgramCache]: Analyzing trace with hash -738367474, now seen corresponding path program 100 times [2019-12-18 19:37:26,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:26,809 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544560755] [2019-12-18 19:37:26,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:26,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:26,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544560755] [2019-12-18 19:37:26,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109783626] [2019-12-18 19:37:26,902 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:26,944 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:37:26,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:26,945 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:26,946 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:27,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:27,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:27,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:27,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151756338] [2019-12-18 19:37:27,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:27,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:27,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:27,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:27,065 INFO L87 Difference]: Start difference. First operand 148 states and 336 transitions. Second operand 18 states. [2019-12-18 19:37:27,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:27,583 INFO L93 Difference]: Finished difference Result 237 states and 503 transitions. [2019-12-18 19:37:27,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 19:37:27,583 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:27,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:27,584 INFO L225 Difference]: With dead ends: 237 [2019-12-18 19:37:27,584 INFO L226 Difference]: Without dead ends: 236 [2019-12-18 19:37:27,585 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 19:37:27,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-12-18 19:37:27,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 147. [2019-12-18 19:37:27,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-18 19:37:27,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 333 transitions. [2019-12-18 19:37:27,588 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 333 transitions. Word has length 14 [2019-12-18 19:37:27,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:27,588 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 333 transitions. [2019-12-18 19:37:27,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:27,588 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 333 transitions. [2019-12-18 19:37:27,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:27,589 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:27,589 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:27,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:27,789 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:27,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:27,790 INFO L82 PathProgramCache]: Analyzing trace with hash -738372124, now seen corresponding path program 101 times [2019-12-18 19:37:27,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:27,790 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600857050] [2019-12-18 19:37:27,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:27,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:27,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600857050] [2019-12-18 19:37:27,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425560364] [2019-12-18 19:37:27,892 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:27,936 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 19:37:27,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:27,937 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:27,938 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:28,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:28,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:28,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903312010] [2019-12-18 19:37:28,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:28,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:28,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:28,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:28,060 INFO L87 Difference]: Start difference. First operand 147 states and 333 transitions. Second operand 18 states. [2019-12-18 19:37:28,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:28,430 INFO L93 Difference]: Finished difference Result 245 states and 516 transitions. [2019-12-18 19:37:28,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 19:37:28,431 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:28,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:28,432 INFO L225 Difference]: With dead ends: 245 [2019-12-18 19:37:28,432 INFO L226 Difference]: Without dead ends: 243 [2019-12-18 19:37:28,432 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2019-12-18 19:37:28,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-18 19:37:28,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 147. [2019-12-18 19:37:28,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-18 19:37:28,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 333 transitions. [2019-12-18 19:37:28,436 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 333 transitions. Word has length 14 [2019-12-18 19:37:28,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:28,436 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 333 transitions. [2019-12-18 19:37:28,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:28,436 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 333 transitions. [2019-12-18 19:37:28,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:28,436 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:28,436 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:28,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:28,637 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:28,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:28,638 INFO L82 PathProgramCache]: Analyzing trace with hash -738372279, now seen corresponding path program 102 times [2019-12-18 19:37:28,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:28,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946284091] [2019-12-18 19:37:28,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:28,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946284091] [2019-12-18 19:37:28,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557423165] [2019-12-18 19:37:28,730 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:28,773 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:37:28,774 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:28,775 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:28,775 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:28,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:28,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:28,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121053020] [2019-12-18 19:37:28,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:28,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:28,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:28,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:28,890 INFO L87 Difference]: Start difference. First operand 147 states and 333 transitions. Second operand 18 states. [2019-12-18 19:37:29,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:29,380 INFO L93 Difference]: Finished difference Result 248 states and 521 transitions. [2019-12-18 19:37:29,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 19:37:29,381 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:29,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:29,382 INFO L225 Difference]: With dead ends: 248 [2019-12-18 19:37:29,382 INFO L226 Difference]: Without dead ends: 239 [2019-12-18 19:37:29,383 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 19:37:29,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-12-18 19:37:29,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 145. [2019-12-18 19:37:29,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 19:37:29,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 323 transitions. [2019-12-18 19:37:29,387 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 323 transitions. Word has length 14 [2019-12-18 19:37:29,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:29,387 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 323 transitions. [2019-12-18 19:37:29,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:29,387 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 323 transitions. [2019-12-18 19:37:29,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:29,387 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:29,388 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:29,591 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:29,591 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:29,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:29,592 INFO L82 PathProgramCache]: Analyzing trace with hash -738516274, now seen corresponding path program 103 times [2019-12-18 19:37:29,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:29,592 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670182547] [2019-12-18 19:37:29,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:29,705 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670182547] [2019-12-18 19:37:29,705 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271224873] [2019-12-18 19:37:29,705 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:29,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:29,751 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:29,752 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:29,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:29,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:29,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102103189] [2019-12-18 19:37:29,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:29,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:29,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:29,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:29,881 INFO L87 Difference]: Start difference. First operand 145 states and 323 transitions. Second operand 18 states. [2019-12-18 19:37:30,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:30,523 INFO L93 Difference]: Finished difference Result 231 states and 487 transitions. [2019-12-18 19:37:30,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 19:37:30,524 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:30,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:30,525 INFO L225 Difference]: With dead ends: 231 [2019-12-18 19:37:30,525 INFO L226 Difference]: Without dead ends: 229 [2019-12-18 19:37:30,525 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2019-12-18 19:37:30,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-12-18 19:37:30,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 144. [2019-12-18 19:37:30,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 19:37:30,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 319 transitions. [2019-12-18 19:37:30,529 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 319 transitions. Word has length 14 [2019-12-18 19:37:30,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:30,530 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 319 transitions. [2019-12-18 19:37:30,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:30,530 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 319 transitions. [2019-12-18 19:37:30,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:30,530 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:30,530 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:30,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:30,731 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:30,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:30,731 INFO L82 PathProgramCache]: Analyzing trace with hash -738516429, now seen corresponding path program 104 times [2019-12-18 19:37:30,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:30,732 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441135363] [2019-12-18 19:37:30,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:30,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441135363] [2019-12-18 19:37:30,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480372203] [2019-12-18 19:37:30,819 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:30,862 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:37:30,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:30,863 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:30,864 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:32,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:32,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:32,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044849303] [2019-12-18 19:37:32,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:32,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:32,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:32,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=229, Unknown=1, NotChecked=0, Total=306 [2019-12-18 19:37:32,558 INFO L87 Difference]: Start difference. First operand 144 states and 319 transitions. Second operand 18 states. [2019-12-18 19:37:35,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:35,075 INFO L93 Difference]: Finished difference Result 235 states and 487 transitions. [2019-12-18 19:37:35,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 19:37:35,075 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:35,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:35,076 INFO L225 Difference]: With dead ends: 235 [2019-12-18 19:37:35,076 INFO L226 Difference]: Without dead ends: 231 [2019-12-18 19:37:35,077 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=353, Invalid=835, Unknown=2, NotChecked=0, Total=1190 [2019-12-18 19:37:35,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-12-18 19:37:35,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 138. [2019-12-18 19:37:35,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 19:37:35,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 299 transitions. [2019-12-18 19:37:35,080 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 299 transitions. Word has length 14 [2019-12-18 19:37:35,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:35,080 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 299 transitions. [2019-12-18 19:37:35,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:35,080 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 299 transitions. [2019-12-18 19:37:35,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:35,081 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:35,081 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:35,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:35,284 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:35,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:35,284 INFO L82 PathProgramCache]: Analyzing trace with hash -876900274, now seen corresponding path program 105 times [2019-12-18 19:37:35,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:35,285 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660584647] [2019-12-18 19:37:35,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:35,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660584647] [2019-12-18 19:37:35,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357884886] [2019-12-18 19:37:35,371 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:35,418 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 19:37:35,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:35,420 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:35,421 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:35,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:35,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:35,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302978811] [2019-12-18 19:37:35,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:35,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:35,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:35,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:35,643 INFO L87 Difference]: Start difference. First operand 138 states and 299 transitions. Second operand 18 states. [2019-12-18 19:37:38,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:38,163 INFO L93 Difference]: Finished difference Result 228 states and 467 transitions. [2019-12-18 19:37:38,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 19:37:38,164 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:38,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:38,165 INFO L225 Difference]: With dead ends: 228 [2019-12-18 19:37:38,165 INFO L226 Difference]: Without dead ends: 227 [2019-12-18 19:37:38,165 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=410, Invalid=921, Unknown=1, NotChecked=0, Total=1332 [2019-12-18 19:37:38,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-18 19:37:38,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 134. [2019-12-18 19:37:38,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-18 19:37:38,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 283 transitions. [2019-12-18 19:37:38,169 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 283 transitions. Word has length 14 [2019-12-18 19:37:38,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:38,169 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 283 transitions. [2019-12-18 19:37:38,169 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:38,169 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 283 transitions. [2019-12-18 19:37:38,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:38,170 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:38,170 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:38,370 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:38,370 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:38,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:38,371 INFO L82 PathProgramCache]: Analyzing trace with hash -877049384, now seen corresponding path program 106 times [2019-12-18 19:37:38,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:38,371 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336558581] [2019-12-18 19:37:38,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:38,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336558581] [2019-12-18 19:37:38,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000259604] [2019-12-18 19:37:38,456 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:38,499 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:37:38,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:38,500 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:38,501 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:41,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:41,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:41,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647085847] [2019-12-18 19:37:41,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:41,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:41,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:41,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=231, Unknown=2, NotChecked=0, Total=306 [2019-12-18 19:37:41,419 INFO L87 Difference]: Start difference. First operand 134 states and 283 transitions. Second operand 18 states. [2019-12-18 19:37:43,668 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2019-12-18 19:37:43,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:43,823 INFO L93 Difference]: Finished difference Result 194 states and 391 transitions. [2019-12-18 19:37:43,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-18 19:37:43,824 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:43,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:43,825 INFO L225 Difference]: With dead ends: 194 [2019-12-18 19:37:43,825 INFO L226 Difference]: Without dead ends: 189 [2019-12-18 19:37:43,825 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=418, Invalid=1060, Unknown=4, NotChecked=0, Total=1482 [2019-12-18 19:37:43,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-18 19:37:43,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 131. [2019-12-18 19:37:43,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-18 19:37:43,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 272 transitions. [2019-12-18 19:37:43,828 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 272 transitions. Word has length 14 [2019-12-18 19:37:43,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:43,828 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 272 transitions. [2019-12-18 19:37:43,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:43,829 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 272 transitions. [2019-12-18 19:37:43,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:43,829 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:43,829 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:44,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:44,030 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:44,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:44,030 INFO L82 PathProgramCache]: Analyzing trace with hash -881666834, now seen corresponding path program 107 times [2019-12-18 19:37:44,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:44,031 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916156657] [2019-12-18 19:37:44,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:44,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:44,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916156657] [2019-12-18 19:37:44,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887394260] [2019-12-18 19:37:44,135 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:44,180 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 19:37:44,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:44,182 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:44,182 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:44,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:44,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:44,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936907569] [2019-12-18 19:37:44,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:44,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:44,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:44,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:44,313 INFO L87 Difference]: Start difference. First operand 131 states and 272 transitions. Second operand 18 states. [2019-12-18 19:37:44,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:44,903 INFO L93 Difference]: Finished difference Result 161 states and 323 transitions. [2019-12-18 19:37:44,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 19:37:44,909 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:44,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:44,909 INFO L225 Difference]: With dead ends: 161 [2019-12-18 19:37:44,909 INFO L226 Difference]: Without dead ends: 159 [2019-12-18 19:37:44,910 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2019-12-18 19:37:44,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-18 19:37:44,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 121. [2019-12-18 19:37:44,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-18 19:37:44,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 247 transitions. [2019-12-18 19:37:44,912 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 247 transitions. Word has length 14 [2019-12-18 19:37:44,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:44,912 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 247 transitions. [2019-12-18 19:37:44,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:44,912 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 247 transitions. [2019-12-18 19:37:44,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 19:37:44,913 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:44,913 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:45,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:45,114 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:45,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:45,114 INFO L82 PathProgramCache]: Analyzing trace with hash -916943731, now seen corresponding path program 108 times [2019-12-18 19:37:45,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:45,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860735252] [2019-12-18 19:37:45,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:45,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860735252] [2019-12-18 19:37:45,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913841520] [2019-12-18 19:37:45,221 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:45,265 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:37:45,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:45,266 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 19:37:45,267 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:45,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:45,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-18 19:37:45,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636739453] [2019-12-18 19:37:45,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 19:37:45,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:45,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 19:37:45,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2019-12-18 19:37:45,483 INFO L87 Difference]: Start difference. First operand 121 states and 247 transitions. Second operand 20 states. [2019-12-18 19:37:46,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:46,085 INFO L93 Difference]: Finished difference Result 164 states and 329 transitions. [2019-12-18 19:37:46,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:37:46,085 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2019-12-18 19:37:46,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:46,086 INFO L225 Difference]: With dead ends: 164 [2019-12-18 19:37:46,086 INFO L226 Difference]: Without dead ends: 162 [2019-12-18 19:37:46,087 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2019-12-18 19:37:46,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-18 19:37:46,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 122. [2019-12-18 19:37:46,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-12-18 19:37:46,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 251 transitions. [2019-12-18 19:37:46,090 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 251 transitions. Word has length 15 [2019-12-18 19:37:46,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:46,090 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 251 transitions. [2019-12-18 19:37:46,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 19:37:46,090 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 251 transitions. [2019-12-18 19:37:46,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 19:37:46,090 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:46,091 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:46,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:46,291 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:46,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:46,292 INFO L82 PathProgramCache]: Analyzing trace with hash -884620496, now seen corresponding path program 109 times [2019-12-18 19:37:46,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:46,292 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224228588] [2019-12-18 19:37:46,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:46,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224228588] [2019-12-18 19:37:46,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420409588] [2019-12-18 19:37:46,399 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:46,443 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 19:37:46,443 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:46,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:46,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-18 19:37:46,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571791362] [2019-12-18 19:37:46,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 19:37:46,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:46,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 19:37:46,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2019-12-18 19:37:46,618 INFO L87 Difference]: Start difference. First operand 122 states and 251 transitions. Second operand 20 states. [2019-12-18 19:37:47,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:47,176 INFO L93 Difference]: Finished difference Result 170 states and 341 transitions. [2019-12-18 19:37:47,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:37:47,176 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2019-12-18 19:37:47,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:47,177 INFO L225 Difference]: With dead ends: 170 [2019-12-18 19:37:47,177 INFO L226 Difference]: Without dead ends: 161 [2019-12-18 19:37:47,178 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=401, Invalid=931, Unknown=0, NotChecked=0, Total=1332 [2019-12-18 19:37:47,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-18 19:37:47,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 131. [2019-12-18 19:37:47,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-18 19:37:47,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 275 transitions. [2019-12-18 19:37:47,181 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 275 transitions. Word has length 15 [2019-12-18 19:37:47,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:47,181 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 275 transitions. [2019-12-18 19:37:47,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 19:37:47,181 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 275 transitions. [2019-12-18 19:37:47,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 19:37:47,182 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:47,182 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:47,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:47,383 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:47,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:47,383 INFO L82 PathProgramCache]: Analyzing trace with hash -884620651, now seen corresponding path program 110 times [2019-12-18 19:37:47,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:47,384 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441842829] [2019-12-18 19:37:47,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:47,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441842829] [2019-12-18 19:37:47,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832738301] [2019-12-18 19:37:47,491 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:47,536 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:37:47,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:47,538 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 19:37:47,538 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:47,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:47,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-18 19:37:47,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405381040] [2019-12-18 19:37:47,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 19:37:47,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:47,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 19:37:47,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2019-12-18 19:37:47,730 INFO L87 Difference]: Start difference. First operand 131 states and 275 transitions. Second operand 20 states. [2019-12-18 19:37:48,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:48,458 INFO L93 Difference]: Finished difference Result 204 states and 409 transitions. [2019-12-18 19:37:48,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 19:37:48,458 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2019-12-18 19:37:48,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:48,459 INFO L225 Difference]: With dead ends: 204 [2019-12-18 19:37:48,459 INFO L226 Difference]: Without dead ends: 201 [2019-12-18 19:37:48,459 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=432, Invalid=974, Unknown=0, NotChecked=0, Total=1406 [2019-12-18 19:37:48,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-12-18 19:37:48,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 131. [2019-12-18 19:37:48,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-18 19:37:48,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 274 transitions. [2019-12-18 19:37:48,463 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 274 transitions. Word has length 15 [2019-12-18 19:37:48,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:48,463 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 274 transitions. [2019-12-18 19:37:48,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 19:37:48,463 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 274 transitions. [2019-12-18 19:37:48,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 19:37:48,463 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:48,463 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:48,664 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:48,664 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:48,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:48,665 INFO L82 PathProgramCache]: Analyzing trace with hash -884625301, now seen corresponding path program 111 times [2019-12-18 19:37:48,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:48,665 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528293350] [2019-12-18 19:37:48,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:48,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:48,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528293350] [2019-12-18 19:37:48,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316923590] [2019-12-18 19:37:48,793 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:48,837 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 19:37:48,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:48,838 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 19:37:48,851 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:49,529 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:49,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:49,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-18 19:37:49,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35944804] [2019-12-18 19:37:49,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 19:37:49,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:49,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 19:37:49,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=291, Unknown=1, NotChecked=0, Total=380 [2019-12-18 19:37:49,531 INFO L87 Difference]: Start difference. First operand 131 states and 274 transitions. Second operand 20 states. [2019-12-18 19:37:52,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:52,083 INFO L93 Difference]: Finished difference Result 210 states and 421 transitions. [2019-12-18 19:37:52,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-18 19:37:52,084 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2019-12-18 19:37:52,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:52,085 INFO L225 Difference]: With dead ends: 210 [2019-12-18 19:37:52,085 INFO L226 Difference]: Without dead ends: 208 [2019-12-18 19:37:52,085 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=428, Invalid=977, Unknown=1, NotChecked=0, Total=1406 [2019-12-18 19:37:52,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-12-18 19:37:52,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 131. [2019-12-18 19:37:52,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-18 19:37:52,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 274 transitions. [2019-12-18 19:37:52,088 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 274 transitions. Word has length 15 [2019-12-18 19:37:52,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:52,089 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 274 transitions. [2019-12-18 19:37:52,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 19:37:52,089 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 274 transitions. [2019-12-18 19:37:52,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 19:37:52,089 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:52,090 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:52,290 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:52,290 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:52,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:52,291 INFO L82 PathProgramCache]: Analyzing trace with hash -884769451, now seen corresponding path program 112 times [2019-12-18 19:37:52,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:52,291 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760813761] [2019-12-18 19:37:52,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:52,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760813761] [2019-12-18 19:37:52,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729101134] [2019-12-18 19:37:52,395 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:52,444 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:37:52,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:52,445 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 19:37:52,446 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:53,070 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-18 19:37:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:53,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:53,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-18 19:37:53,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281860730] [2019-12-18 19:37:53,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 19:37:53,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:53,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 19:37:53,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=292, Unknown=1, NotChecked=0, Total=380 [2019-12-18 19:37:53,223 INFO L87 Difference]: Start difference. First operand 131 states and 274 transitions. Second operand 20 states. [2019-12-18 19:37:53,831 WARN L192 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-18 19:37:56,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:56,436 INFO L93 Difference]: Finished difference Result 204 states and 412 transitions. [2019-12-18 19:37:56,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-18 19:37:56,436 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2019-12-18 19:37:56,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:56,437 INFO L225 Difference]: With dead ends: 204 [2019-12-18 19:37:56,437 INFO L226 Difference]: Without dead ends: 202 [2019-12-18 19:37:56,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=427, Invalid=978, Unknown=1, NotChecked=0, Total=1406 [2019-12-18 19:37:56,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-12-18 19:37:56,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 131. [2019-12-18 19:37:56,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-18 19:37:56,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 274 transitions. [2019-12-18 19:37:56,440 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 274 transitions. Word has length 15 [2019-12-18 19:37:56,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:56,441 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 274 transitions. [2019-12-18 19:37:56,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 19:37:56,441 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 274 transitions. [2019-12-18 19:37:56,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 19:37:56,441 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:56,441 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:56,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:56,642 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:56,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:56,642 INFO L82 PathProgramCache]: Analyzing trace with hash 117399634, now seen corresponding path program 113 times [2019-12-18 19:37:56,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:56,643 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563922742] [2019-12-18 19:37:56,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:56,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563922742] [2019-12-18 19:37:56,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853593140] [2019-12-18 19:37:56,763 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:56,806 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 19:37:56,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:56,807 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 19:37:56,808 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:37:58,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:58,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-18 19:37:58,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992890170] [2019-12-18 19:37:58,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 19:37:58,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:58,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 19:37:58,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=293, Unknown=2, NotChecked=0, Total=380 [2019-12-18 19:37:58,659 INFO L87 Difference]: Start difference. First operand 131 states and 274 transitions. Second operand 20 states. [2019-12-18 19:37:59,678 WARN L192 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-18 19:38:00,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:38:00,910 INFO L93 Difference]: Finished difference Result 208 states and 415 transitions. [2019-12-18 19:38:00,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 19:38:00,911 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2019-12-18 19:38:00,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:38:00,911 INFO L225 Difference]: With dead ends: 208 [2019-12-18 19:38:00,912 INFO L226 Difference]: Without dead ends: 205 [2019-12-18 19:38:00,912 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=489, Invalid=1148, Unknown=3, NotChecked=0, Total=1640 [2019-12-18 19:38:00,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-18 19:38:00,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 136. [2019-12-18 19:38:00,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-18 19:38:00,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 286 transitions. [2019-12-18 19:38:00,915 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 286 transitions. Word has length 15 [2019-12-18 19:38:00,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:38:00,916 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 286 transitions. [2019-12-18 19:38:00,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 19:38:00,916 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 286 transitions. [2019-12-18 19:38:00,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 19:38:00,916 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:38:00,916 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:38:01,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:38:01,117 INFO L410 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:38:01,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:38:01,117 INFO L82 PathProgramCache]: Analyzing trace with hash 117394984, now seen corresponding path program 114 times [2019-12-18 19:38:01,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:38:01,118 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735638682] [2019-12-18 19:38:01,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:38:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:38:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:38:01,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735638682] [2019-12-18 19:38:01,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837489835] [2019-12-18 19:38:01,220 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:38:01,264 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:38:01,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:38:01,270 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 19:38:01,270 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:38:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:38:03,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:38:03,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-18 19:38:03,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877548671] [2019-12-18 19:38:03,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 19:38:03,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:38:03,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 19:38:03,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2019-12-18 19:38:03,362 INFO L87 Difference]: Start difference. First operand 136 states and 286 transitions. Second operand 20 states. [2019-12-18 19:38:03,830 WARN L192 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 29 [2019-12-18 19:38:04,367 WARN L192 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2019-12-18 19:38:04,998 WARN L192 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2019-12-18 19:38:07,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:38:07,251 INFO L93 Difference]: Finished difference Result 247 states and 496 transitions. [2019-12-18 19:38:07,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 19:38:07,252 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2019-12-18 19:38:07,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:38:07,253 INFO L225 Difference]: With dead ends: 247 [2019-12-18 19:38:07,253 INFO L226 Difference]: Without dead ends: 243 [2019-12-18 19:38:07,253 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=453, Invalid=1026, Unknown=3, NotChecked=0, Total=1482 [2019-12-18 19:38:07,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-18 19:38:07,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 138. [2019-12-18 19:38:07,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 19:38:07,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 293 transitions. [2019-12-18 19:38:07,257 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 293 transitions. Word has length 15 [2019-12-18 19:38:07,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:38:07,257 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 293 transitions. [2019-12-18 19:38:07,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 19:38:07,257 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 293 transitions. [2019-12-18 19:38:07,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 19:38:07,258 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:38:07,258 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:38:07,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:38:07,460 INFO L410 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:38:07,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:38:07,461 INFO L82 PathProgramCache]: Analyzing trace with hash 117394829, now seen corresponding path program 115 times [2019-12-18 19:38:07,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:38:07,462 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101784818] [2019-12-18 19:38:07,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:38:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:38:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:38:07,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101784818] [2019-12-18 19:38:07,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708729248] [2019-12-18 19:38:07,610 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:38:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:38:07,651 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 19:38:07,652 INFO L287 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2019-12-18 19:38:10,138 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:38:10,138 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-18 19:38:10,143 WARN L227 ceAbstractionStarter]: Timeout [2019-12-18 19:38:10,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 07:38:10 BasicIcfg [2019-12-18 19:38:10,143 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-18 19:38:10,144 INFO L168 Benchmark]: Toolchain (without parser) took 286376.49 ms. Allocated memory was 138.4 MB in the beginning and 174.6 MB in the end (delta: 36.2 MB). Free memory was 101.7 MB in the beginning and 88.3 MB in the end (delta: 13.5 MB). Peak memory consumption was 49.6 MB. Max. memory is 7.1 GB. [2019-12-18 19:38:10,145 INFO L168 Benchmark]: CDTParser took 1.37 ms. Allocated memory is still 138.4 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-12-18 19:38:10,145 INFO L168 Benchmark]: CACSL2BoogieTranslator took 762.19 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 101.3 MB in the beginning and 161.6 MB in the end (delta: -60.3 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2019-12-18 19:38:10,145 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.89 ms. Allocated memory is still 202.4 MB. Free memory was 161.6 MB in the beginning and 159.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-18 19:38:10,146 INFO L168 Benchmark]: Boogie Preprocessor took 32.15 ms. Allocated memory is still 202.4 MB. Free memory was 159.6 MB in the beginning and 158.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-12-18 19:38:10,146 INFO L168 Benchmark]: RCFGBuilder took 438.59 ms. Allocated memory is still 202.4 MB. Free memory was 158.2 MB in the beginning and 137.7 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2019-12-18 19:38:10,146 INFO L168 Benchmark]: TraceAbstraction took 285074.25 ms. Allocated memory was 202.4 MB in the beginning and 174.6 MB in the end (delta: -27.8 MB). Free memory was 137.7 MB in the beginning and 88.3 MB in the end (delta: 49.5 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. [2019-12-18 19:38:10,148 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.37 ms. Allocated memory is still 138.4 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 762.19 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 101.3 MB in the beginning and 161.6 MB in the end (delta: -60.3 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 63.89 ms. Allocated memory is still 202.4 MB. Free memory was 161.6 MB in the beginning and 159.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.15 ms. Allocated memory is still 202.4 MB. Free memory was 159.6 MB in the beginning and 158.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 438.59 ms. Allocated memory is still 202.4 MB. Free memory was 158.2 MB in the beginning and 137.7 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 285074.25 ms. Allocated memory was 202.4 MB in the beginning and 174.6 MB in the end (delta: -27.8 MB). Free memory was 137.7 MB in the beginning and 88.3 MB in the end (delta: 49.5 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 55 ProgramPointsBefore, 16 ProgramPointsAfterwards, 53 TransitionsBefore, 14 TransitionsAfterwards, 836 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 433 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 686 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 18 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 284.9s, OverallIterations: 128, TraceHistogramMax: 6, AutomataDifference: 148.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1385 SDtfs, 17978 SDslu, 11424 SDs, 0 SdLazy, 7142 SolverSat, 4577 SolverUnsat, 22 SolverUnknown, 0 SolverNotchecked, 36.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3834 GetRequests, 602 SyntacticMatches, 6 SemanticMatches, 3226 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 20501 ImplicationChecksByTransitivity, 205.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=176occurred in iteration=57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 127 MinimizatonAttempts, 6687 StatesRemovedByMinimization, 124 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 99.6s InterpolantComputationTime, 3199 NumberOfCodeBlocks, 3199 NumberOfCodeBlocksAsserted, 417 NumberOfCheckSat, 2950 ConstructedInterpolants, 123 QuantifiedInterpolants, 457734 SizeOfPredicates, 2 NumberOfNonLiveVariables, 11433 ConjunctsInSsa, 1352 ConjunctsInUnsatCore, 249 InterpolantComputations, 7 PerfectInterpolantSequences, 30/1890 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown