/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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-fae578e [2019-12-18 19:33:22,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-18 19:33:22,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-18 19:33:22,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-18 19:33:22,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-18 19:33:22,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-18 19:33:22,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-18 19:33:22,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-18 19:33:22,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-18 19:33:22,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-18 19:33:22,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-18 19:33:22,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-18 19:33:22,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-18 19:33:22,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-18 19:33:22,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-18 19:33:22,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-18 19:33:22,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-18 19:33:22,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-18 19:33:22,441 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-18 19:33:22,443 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-18 19:33:22,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-18 19:33:22,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-18 19:33:22,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-18 19:33:22,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-18 19:33:22,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-12-18 19:33:22,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-18 19:33:22,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-18 19:33:22,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-18 19:33:22,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-18 19:33:22,456 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-18 19:33:22,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-18 19:33:22,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-18 19:33:22,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-18 19:33:22,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-18 19:33:22,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-18 19:33:22,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-18 19:33:22,460 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 19:33:22,473 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-18 19:33:22,474 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-18 19:33:22,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-18 19:33:22,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-18 19:33:22,475 INFO L138 SettingsManager]: * Use SBE=true [2019-12-18 19:33:22,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-18 19:33:22,476 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-18 19:33:22,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-18 19:33:22,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-18 19:33:22,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-18 19:33:22,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-18 19:33:22,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-18 19:33:22,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-18 19:33:22,477 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-18 19:33:22,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-18 19:33:22,478 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-18 19:33:22,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-18 19:33:22,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-18 19:33:22,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-18 19:33:22,478 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-18 19:33:22,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-18 19:33:22,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 19:33:22,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-18 19:33:22,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-18 19:33:22,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-18 19:33:22,480 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-18 19:33:22,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-18 19:33:22,480 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2019-12-18 19:33:22,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-18 19:33:22,480 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-18 19:33:22,754 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-18 19:33:22,767 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-18 19:33:22,770 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-18 19:33:22,772 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-18 19:33:22,772 INFO L275 PluginConnector]: CDTParser initialized [2019-12-18 19:33:22,773 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-1.i [2019-12-18 19:33:22,846 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c602a2987/bebbde6e36fe43a6932575fdd4902ff8/FLAG3745ade3d [2019-12-18 19:33:23,443 INFO L306 CDTParser]: Found 1 translation units. [2019-12-18 19:33:23,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i [2019-12-18 19:33:23,457 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c602a2987/bebbde6e36fe43a6932575fdd4902ff8/FLAG3745ade3d [2019-12-18 19:33:23,697 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c602a2987/bebbde6e36fe43a6932575fdd4902ff8 [2019-12-18 19:33:23,707 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-18 19:33:23,709 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-18 19:33:23,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-18 19:33:23,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-18 19:33:23,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-18 19:33:23,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:33:23" (1/1) ... [2019-12-18 19:33:23,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f522b85 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 19:33:23,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:33:23" (1/1) ... [2019-12-18 19:33:23,725 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-18 19:33:23,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-18 19:33:24,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 19:33:24,300 INFO L203 MainTranslator]: Completed pre-run [2019-12-18 19:33:24,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 19:33:24,439 INFO L208 MainTranslator]: Completed translation [2019-12-18 19:33:24,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:33:24 WrapperNode [2019-12-18 19:33:24,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-18 19:33:24,441 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-18 19:33:24,441 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-18 19:33:24,441 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-18 19:33:24,450 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 19:33:24,468 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 19:33:24,487 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-18 19:33:24,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-18 19:33:24,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-18 19:33:24,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-18 19:33:24,494 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 19:33:24,495 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 19:33:24,497 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 19:33:24,498 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 19:33:24,503 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 19:33:24,507 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 19:33:24,509 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 19:33:24,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-18 19:33:24,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-18 19:33:24,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-18 19:33:24,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-18 19:33:24,514 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 19:33:24,574 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-18 19:33:24,574 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-18 19:33:24,574 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-18 19:33:24,574 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-18 19:33:24,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-18 19:33:24,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-18 19:33:24,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-18 19:33:24,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-18 19:33:24,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-18 19:33:24,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-18 19:33:24,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-18 19:33:24,579 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 19:33:24,930 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-18 19:33:24,930 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-18 19:33:24,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:33:24 BoogieIcfgContainer [2019-12-18 19:33:24,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-18 19:33:24,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-18 19:33:24,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-18 19:33:24,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-18 19:33:24,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:33:23" (1/3) ... [2019-12-18 19:33:24,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef62d49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:33:24, skipping insertion in model container [2019-12-18 19:33:24,938 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 19:33:24,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef62d49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:33:24, skipping insertion in model container [2019-12-18 19:33:24,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:33:24" (3/3) ... [2019-12-18 19:33:24,940 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2019-12-18 19:33:24,960 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-18 19:33:24,960 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-18 19:33:24,969 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-18 19:33:24,970 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-18 19:33:25,001 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,001 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,002 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,002 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,002 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,003 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,003 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,003 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,004 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,004 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,004 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,004 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,005 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,005 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,005 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,006 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,006 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,006 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,007 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,007 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,007 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,008 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,008 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,008 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,008 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,009 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,009 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,009 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,009 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,010 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,014 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,014 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,014 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,015 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,015 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,015 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,020 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,020 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,021 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,021 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,021 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,021 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:33:25,034 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-18 19:33:25,052 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-18 19:33:25,052 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-18 19:33:25,052 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-18 19:33:25,052 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-18 19:33:25,052 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-18 19:33:25,052 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-18 19:33:25,052 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-18 19:33:25,053 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-18 19:33:25,063 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-18 19:33:25,065 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-18 19:33:25,102 INFO L126 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-18 19:33:25,103 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 19:33:25,112 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 19:33:25,119 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-18 19:33:25,137 INFO L126 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-18 19:33:25,137 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 19:33:25,139 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 19:33:25,142 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-18 19:33:25,143 INFO L182 etLargeBlockEncoding]: Variable Check. [2019-12-18 19:33:26,307 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-18 19:33:26,424 INFO L206 etLargeBlockEncoding]: Checked pairs total: 686 [2019-12-18 19:33:26,425 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-18 19:33:26,429 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-18 19:33:26,439 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-18 19:33:26,441 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-18 19:33:26,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-18 19:33:26,448 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:26,449 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-18 19:33:26,449 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:26,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:26,456 INFO L82 PathProgramCache]: Analyzing trace with hash 214338580, now seen corresponding path program 1 times [2019-12-18 19:33:26,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:26,466 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561334944] [2019-12-18 19:33:26,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:26,673 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 19:33:26,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561334944] [2019-12-18 19:33:26,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 19:33:26,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-18 19:33:26,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269035346] [2019-12-18 19:33:26,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 19:33:26,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:26,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 19:33:26,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 19:33:26,704 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-18 19:33:26,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:26,748 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-18 19:33:26,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 19:33:26,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-18 19:33:26,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:26,784 INFO L225 Difference]: With dead ends: 54 [2019-12-18 19:33:26,785 INFO L226 Difference]: Without dead ends: 36 [2019-12-18 19:33:26,786 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 19:33:26,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-18 19:33:26,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-18 19:33:26,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-18 19:33:26,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-18 19:33:26,844 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-18 19:33:26,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:26,844 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-18 19:33:26,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 19:33:26,845 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-18 19:33:26,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-18 19:33:26,846 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:26,846 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:26,846 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:26,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:26,847 INFO L82 PathProgramCache]: Analyzing trace with hash -179042095, now seen corresponding path program 1 times [2019-12-18 19:33:26,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:26,847 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961238771] [2019-12-18 19:33:26,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:26,967 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 19:33:26,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961238771] [2019-12-18 19:33:26,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 19:33:26,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 19:33:26,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872888834] [2019-12-18 19:33:26,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-18 19:33:26,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:26,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-18 19:33:26,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-18 19:33:26,971 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-18 19:33:27,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:27,014 INFO L93 Difference]: Finished difference Result 42 states and 90 transitions. [2019-12-18 19:33:27,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-18 19:33:27,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-18 19:33:27,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:27,016 INFO L225 Difference]: With dead ends: 42 [2019-12-18 19:33:27,016 INFO L226 Difference]: Without dead ends: 41 [2019-12-18 19:33:27,017 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 19:33:27,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-18 19:33:27,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-12-18 19:33:27,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-18 19:33:27,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 86 transitions. [2019-12-18 19:33:27,025 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 86 transitions. Word has length 7 [2019-12-18 19:33:27,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:27,025 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 86 transitions. [2019-12-18 19:33:27,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-18 19:33:27,026 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 86 transitions. [2019-12-18 19:33:27,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-18 19:33:27,026 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:27,026 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:27,027 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:27,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:27,027 INFO L82 PathProgramCache]: Analyzing trace with hash -179038096, now seen corresponding path program 1 times [2019-12-18 19:33:27,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:27,028 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957433087] [2019-12-18 19:33:27,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:33:27,099 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957433087] [2019-12-18 19:33:27,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 19:33:27,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 19:33:27,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821420339] [2019-12-18 19:33:27,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-18 19:33:27,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:27,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-18 19:33:27,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-18 19:33:27,101 INFO L87 Difference]: Start difference. First operand 39 states and 86 transitions. Second operand 4 states. [2019-12-18 19:33:27,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:27,140 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-18 19:33:27,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-18 19:33:27,142 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-18 19:33:27,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:27,144 INFO L225 Difference]: With dead ends: 51 [2019-12-18 19:33:27,145 INFO L226 Difference]: Without dead ends: 50 [2019-12-18 19:33:27,146 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 19:33:27,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-18 19:33:27,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-18 19:33:27,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-18 19:33:27,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-18 19:33:27,159 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-18 19:33:27,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:27,159 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-18 19:33:27,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-18 19:33:27,161 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-18 19:33:27,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-18 19:33:27,162 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:27,163 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:27,163 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:27,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:27,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1255337161, now seen corresponding path program 2 times [2019-12-18 19:33:27,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:27,166 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179899300] [2019-12-18 19:33:27,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:27,277 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 19:33:27,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179899300] [2019-12-18 19:33:27,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274707099] [2019-12-18 19:33:27,279 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 19:33:27,344 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:33:27,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:27,348 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 19:33:27,353 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:27,413 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 19:33:27,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:27,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-18 19:33:27,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226983735] [2019-12-18 19:33:27,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 19:33:27,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:27,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 19:33:27,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-18 19:33:27,416 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 8 states. [2019-12-18 19:33:27,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:27,476 INFO L93 Difference]: Finished difference Result 56 states and 118 transitions. [2019-12-18 19:33:27,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 19:33:27,476 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-18 19:33:27,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:27,477 INFO L225 Difference]: With dead ends: 56 [2019-12-18 19:33:27,478 INFO L226 Difference]: Without dead ends: 55 [2019-12-18 19:33:27,478 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-12-18 19:33:27,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-18 19:33:27,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2019-12-18 19:33:27,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-18 19:33:27,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 108 transitions. [2019-12-18 19:33:27,487 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 108 transitions. Word has length 8 [2019-12-18 19:33:27,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:27,488 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 108 transitions. [2019-12-18 19:33:27,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 19:33:27,488 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 108 transitions. [2019-12-18 19:33:27,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-18 19:33:27,489 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:27,489 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:27,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:27,690 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:27,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:27,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1255213037, now seen corresponding path program 2 times [2019-12-18 19:33:27,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:27,692 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425306887] [2019-12-18 19:33:27,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:27,783 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 19:33:27,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425306887] [2019-12-18 19:33:27,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196085202] [2019-12-18 19:33:27,787 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 19:33:27,862 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:33:27,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:27,863 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 19:33:27,867 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:27,909 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 19:33:27,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:27,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-18 19:33:27,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277043806] [2019-12-18 19:33:27,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 19:33:27,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:27,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 19:33:27,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-18 19:33:27,911 INFO L87 Difference]: Start difference. First operand 50 states and 108 transitions. Second operand 8 states. [2019-12-18 19:33:27,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:27,974 INFO L93 Difference]: Finished difference Result 63 states and 134 transitions. [2019-12-18 19:33:27,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 19:33:27,975 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-18 19:33:27,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:27,976 INFO L225 Difference]: With dead ends: 63 [2019-12-18 19:33:27,976 INFO L226 Difference]: Without dead ends: 62 [2019-12-18 19:33:27,978 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 19:33:27,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-18 19:33:27,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-12-18 19:33:27,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-18 19:33:27,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-18 19:33:27,991 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-18 19:33:27,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:27,992 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-18 19:33:27,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 19:33:27,992 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-18 19:33:27,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 19:33:27,993 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:27,993 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:28,204 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:28,204 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:28,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:28,204 INFO L82 PathProgramCache]: Analyzing trace with hash -260745839, now seen corresponding path program 3 times [2019-12-18 19:33:28,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:28,205 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9267685] [2019-12-18 19:33:28,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:28,299 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 19:33:28,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9267685] [2019-12-18 19:33:28,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547380184] [2019-12-18 19:33:28,299 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 19:33:28,357 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 19:33:28,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:28,359 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 19:33:28,361 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:28,424 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 19:33:28,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:28,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 19:33:28,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640585060] [2019-12-18 19:33:28,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 19:33:28,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:28,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 19:33:28,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-18 19:33:28,426 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 10 states. [2019-12-18 19:33:28,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:28,517 INFO L93 Difference]: Finished difference Result 66 states and 142 transitions. [2019-12-18 19:33:28,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 19:33:28,517 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-18 19:33:28,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:28,518 INFO L225 Difference]: With dead ends: 66 [2019-12-18 19:33:28,518 INFO L226 Difference]: Without dead ends: 65 [2019-12-18 19:33:28,519 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 19:33:28,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-18 19:33:28,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2019-12-18 19:33:28,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-18 19:33:28,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 130 transitions. [2019-12-18 19:33:28,526 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 130 transitions. Word has length 9 [2019-12-18 19:33:28,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:28,527 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 130 transitions. [2019-12-18 19:33:28,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 19:33:28,527 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 130 transitions. [2019-12-18 19:33:28,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 19:33:28,528 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:28,528 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:28,732 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:28,732 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:28,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:28,733 INFO L82 PathProgramCache]: Analyzing trace with hash -260744723, now seen corresponding path program 1 times [2019-12-18 19:33:28,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:28,734 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267154016] [2019-12-18 19:33:28,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:28,802 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 19:33:28,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267154016] [2019-12-18 19:33:28,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 19:33:28,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 19:33:28,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374210363] [2019-12-18 19:33:28,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 19:33:28,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:28,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 19:33:28,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-18 19:33:28,804 INFO L87 Difference]: Start difference. First operand 58 states and 130 transitions. Second operand 5 states. [2019-12-18 19:33:28,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:28,849 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-18 19:33:28,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 19:33:28,853 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 19:33:28,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:28,854 INFO L225 Difference]: With dead ends: 68 [2019-12-18 19:33:28,854 INFO L226 Difference]: Without dead ends: 67 [2019-12-18 19:33:28,855 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 19:33:28,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-18 19:33:28,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2019-12-18 19:33:28,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-18 19:33:28,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 131 transitions. [2019-12-18 19:33:28,862 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 131 transitions. Word has length 9 [2019-12-18 19:33:28,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:28,864 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 131 transitions. [2019-12-18 19:33:28,864 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 19:33:28,864 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 131 transitions. [2019-12-18 19:33:28,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 19:33:28,865 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:28,865 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:28,865 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:28,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:28,866 INFO L82 PathProgramCache]: Analyzing trace with hash -260711243, now seen corresponding path program 2 times [2019-12-18 19:33:28,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:28,866 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493975048] [2019-12-18 19:33:28,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:28,913 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 19:33:28,914 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493975048] [2019-12-18 19:33:28,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 19:33:28,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 19:33:28,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083817099] [2019-12-18 19:33:28,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 19:33:28,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:28,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 19:33:28,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-18 19:33:28,916 INFO L87 Difference]: Start difference. First operand 59 states and 131 transitions. Second operand 5 states. [2019-12-18 19:33:28,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:28,955 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-18 19:33:28,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 19:33:28,955 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 19:33:28,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:28,956 INFO L225 Difference]: With dead ends: 68 [2019-12-18 19:33:28,956 INFO L226 Difference]: Without dead ends: 67 [2019-12-18 19:33:28,957 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 19:33:28,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-18 19:33:28,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2019-12-18 19:33:28,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-18 19:33:28,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 134 transitions. [2019-12-18 19:33:28,963 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 134 transitions. Word has length 9 [2019-12-18 19:33:28,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:28,963 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 134 transitions. [2019-12-18 19:33:28,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 19:33:28,963 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 134 transitions. [2019-12-18 19:33:28,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 19:33:28,964 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:28,964 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:28,964 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:28,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:28,965 INFO L82 PathProgramCache]: Analyzing trace with hash -256897840, now seen corresponding path program 3 times [2019-12-18 19:33:28,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:28,965 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960954708] [2019-12-18 19:33:28,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:29,029 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 19:33:29,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960954708] [2019-12-18 19:33:29,030 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038364345] [2019-12-18 19:33:29,030 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 19:33:29,079 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 19:33:29,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:29,080 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 19:33:29,082 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:29,147 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 19:33:29,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:29,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 19:33:29,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657362744] [2019-12-18 19:33:29,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 19:33:29,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:29,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 19:33:29,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-18 19:33:29,149 INFO L87 Difference]: Start difference. First operand 62 states and 134 transitions. Second operand 10 states. [2019-12-18 19:33:29,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:29,222 INFO L93 Difference]: Finished difference Result 77 states and 162 transitions. [2019-12-18 19:33:29,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 19:33:29,222 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-18 19:33:29,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:29,223 INFO L225 Difference]: With dead ends: 77 [2019-12-18 19:33:29,223 INFO L226 Difference]: Without dead ends: 76 [2019-12-18 19:33:29,224 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 19:33:29,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-18 19:33:29,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2019-12-18 19:33:29,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-18 19:33:29,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-18 19:33:29,230 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-18 19:33:29,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:29,230 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-18 19:33:29,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 19:33:29,230 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-18 19:33:29,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 19:33:29,231 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:29,231 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:29,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:29,435 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:29,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:29,436 INFO L82 PathProgramCache]: Analyzing trace with hash 506814071, now seen corresponding path program 4 times [2019-12-18 19:33:29,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:29,437 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197989091] [2019-12-18 19:33:29,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:29,498 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 19:33:29,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197989091] [2019-12-18 19:33:29,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317765858] [2019-12-18 19:33:29,499 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 19:33:29,548 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:33:29,548 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:29,549 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 19:33:29,550 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:29,634 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 19:33:29,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:29,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 19:33:29,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715827934] [2019-12-18 19:33:29,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 19:33:29,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:29,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 19:33:29,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:33:29,637 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 12 states. [2019-12-18 19:33:29,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:29,734 INFO L93 Difference]: Finished difference Result 80 states and 170 transitions. [2019-12-18 19:33:29,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 19:33:29,735 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-18 19:33:29,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:29,736 INFO L225 Difference]: With dead ends: 80 [2019-12-18 19:33:29,736 INFO L226 Difference]: Without dead ends: 79 [2019-12-18 19:33:29,736 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:33:29,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-18 19:33:29,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2019-12-18 19:33:29,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-18 19:33:29,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-18 19:33:29,746 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-18 19:33:29,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:29,747 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-18 19:33:29,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 19:33:29,747 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-18 19:33:29,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 19:33:29,753 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:29,753 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:29,957 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:29,958 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:29,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:29,959 INFO L82 PathProgramCache]: Analyzing trace with hash 506815187, now seen corresponding path program 3 times [2019-12-18 19:33:29,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:29,960 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011294335] [2019-12-18 19:33:29,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:30,017 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 19:33:30,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011294335] [2019-12-18 19:33:30,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002116891] [2019-12-18 19:33:30,018 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 19:33:30,070 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 19:33:30,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:30,071 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:30,072 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:30,123 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 19:33:30,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:30,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 19:33:30,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446162533] [2019-12-18 19:33:30,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 19:33:30,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:30,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 19:33:30,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-18 19:33:30,125 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-18 19:33:30,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:30,191 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-18 19:33:30,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 19:33:30,191 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 19:33:30,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:30,192 INFO L225 Difference]: With dead ends: 88 [2019-12-18 19:33:30,192 INFO L226 Difference]: Without dead ends: 87 [2019-12-18 19:33:30,193 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 19:33:30,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-18 19:33:30,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2019-12-18 19:33:30,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-18 19:33:30,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-18 19:33:30,197 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-18 19:33:30,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:30,198 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-18 19:33:30,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 19:33:30,198 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-18 19:33:30,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 19:33:30,199 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:30,199 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:30,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:30,400 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:30,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:30,401 INFO L82 PathProgramCache]: Analyzing trace with hash 506848822, now seen corresponding path program 4 times [2019-12-18 19:33:30,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:30,402 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554786700] [2019-12-18 19:33:30,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:30,469 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 19:33:30,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554786700] [2019-12-18 19:33:30,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109729488] [2019-12-18 19:33:30,470 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 19:33:30,512 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:33:30,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:30,513 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 19:33:30,514 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:30,559 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 19:33:30,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:30,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 19:33:30,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060907573] [2019-12-18 19:33:30,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 19:33:30,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:30,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 19:33:30,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-18 19:33:30,561 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-18 19:33:30,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:30,662 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-18 19:33:30,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 19:33:30,663 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 19:33:30,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:30,664 INFO L225 Difference]: With dead ends: 88 [2019-12-18 19:33:30,664 INFO L226 Difference]: Without dead ends: 87 [2019-12-18 19:33:30,664 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 19:33:30,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-18 19:33:30,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2019-12-18 19:33:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-18 19:33:30,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-18 19:33:30,669 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-18 19:33:30,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:30,670 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-18 19:33:30,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 19:33:30,670 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-18 19:33:30,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 19:33:30,671 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:30,671 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:30,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:30,880 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:30,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:30,880 INFO L82 PathProgramCache]: Analyzing trace with hash 506848667, now seen corresponding path program 5 times [2019-12-18 19:33:30,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:30,881 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159211091] [2019-12-18 19:33:30,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:30,956 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 19:33:30,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159211091] [2019-12-18 19:33:30,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996271386] [2019-12-18 19:33:30,957 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 19:33:31,012 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:33:31,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:31,013 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 19:33:31,014 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:31,064 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 19:33:31,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:31,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 19:33:31,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172831246] [2019-12-18 19:33:31,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 19:33:31,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:31,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 19:33:31,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-18 19:33:31,066 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 10 states. [2019-12-18 19:33:31,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:31,161 INFO L93 Difference]: Finished difference Result 94 states and 194 transitions. [2019-12-18 19:33:31,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 19:33:31,161 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 19:33:31,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:31,163 INFO L225 Difference]: With dead ends: 94 [2019-12-18 19:33:31,163 INFO L226 Difference]: Without dead ends: 92 [2019-12-18 19:33:31,164 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 19:33:31,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-12-18 19:33:31,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2019-12-18 19:33:31,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-18 19:33:31,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-18 19:33:31,168 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-18 19:33:31,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:31,168 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-18 19:33:31,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 19:33:31,168 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-18 19:33:31,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 19:33:31,169 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:31,169 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:31,377 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:31,378 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:31,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:31,378 INFO L82 PathProgramCache]: Analyzing trace with hash 507886702, now seen corresponding path program 6 times [2019-12-18 19:33:31,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:31,379 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899137598] [2019-12-18 19:33:31,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:31,454 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 19:33:31,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899137598] [2019-12-18 19:33:31,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416974928] [2019-12-18 19:33:31,455 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 19:33:31,518 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 19:33:31,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:31,519 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 19:33:31,522 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:31,600 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 19:33:31,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:31,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 19:33:31,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318863858] [2019-12-18 19:33:31,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 19:33:31,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:31,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 19:33:31,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-18 19:33:31,602 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 10 states. [2019-12-18 19:33:31,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:31,715 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-18 19:33:31,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 19:33:31,716 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 19:33:31,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:31,717 INFO L225 Difference]: With dead ends: 88 [2019-12-18 19:33:31,717 INFO L226 Difference]: Without dead ends: 87 [2019-12-18 19:33:31,718 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 19:33:31,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-18 19:33:31,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2019-12-18 19:33:31,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-18 19:33:31,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-18 19:33:31,723 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-18 19:33:31,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:31,724 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-18 19:33:31,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 19:33:31,724 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-18 19:33:31,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 19:33:31,725 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:31,725 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:31,928 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:31,931 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:31,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:31,931 INFO L82 PathProgramCache]: Analyzing trace with hash 626102195, now seen corresponding path program 4 times [2019-12-18 19:33:31,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:31,932 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457501543] [2019-12-18 19:33:31,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:32,029 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 19:33:32,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457501543] [2019-12-18 19:33:32,030 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239254376] [2019-12-18 19:33:32,030 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 19:33:32,098 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:33:32,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:32,100 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 19:33:32,101 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:32,204 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 19:33:32,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:32,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 19:33:32,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889243793] [2019-12-18 19:33:32,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 19:33:32,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:32,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 19:33:32,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:33:32,207 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 12 states. [2019-12-18 19:33:32,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:32,336 INFO L93 Difference]: Finished difference Result 92 states and 194 transitions. [2019-12-18 19:33:32,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 19:33:32,337 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-18 19:33:32,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:32,338 INFO L225 Difference]: With dead ends: 92 [2019-12-18 19:33:32,338 INFO L226 Difference]: Without dead ends: 91 [2019-12-18 19:33:32,338 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 19:33:32,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-18 19:33:32,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2019-12-18 19:33:32,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-18 19:33:32,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-18 19:33:32,342 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-18 19:33:32,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:32,343 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-18 19:33:32,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 19:33:32,343 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-18 19:33:32,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 19:33:32,343 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:32,344 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:32,548 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:32,549 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:32,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:32,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1468632495, now seen corresponding path program 5 times [2019-12-18 19:33:32,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:32,550 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649980699] [2019-12-18 19:33:32,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:32,681 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 19:33:32,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649980699] [2019-12-18 19:33:32,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852300763] [2019-12-18 19:33:32,682 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 19:33:32,761 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:33:32,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:32,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:32,765 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:32,903 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 19:33:32,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:32,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:32,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517925381] [2019-12-18 19:33:32,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:32,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:32,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:32,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:32,907 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 14 states. [2019-12-18 19:33:33,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:33,087 INFO L93 Difference]: Finished difference Result 95 states and 202 transitions. [2019-12-18 19:33:33,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 19:33:33,088 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-18 19:33:33,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:33,090 INFO L225 Difference]: With dead ends: 95 [2019-12-18 19:33:33,090 INFO L226 Difference]: Without dead ends: 94 [2019-12-18 19:33:33,090 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 19:33:33,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-18 19:33:33,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2019-12-18 19:33:33,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 19:33:33,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 19:33:33,097 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 19:33:33,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:33,097 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 19:33:33,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:33,098 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 19:33:33,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 19:33:33,098 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:33,099 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:33,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:33,311 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:33,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:33,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1468631379, now seen corresponding path program 7 times [2019-12-18 19:33:33,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:33,312 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318247030] [2019-12-18 19:33:33,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:33,387 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 19:33:33,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318247030] [2019-12-18 19:33:33,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062963242] [2019-12-18 19:33:33,388 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 19:33:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:33,440 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 19:33:33,441 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:33,516 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 19:33:33,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:33,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 19:33:33,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736718538] [2019-12-18 19:33:33,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 19:33:33,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:33,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 19:33:33,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:33:33,519 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 19:33:33,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:33,691 INFO L93 Difference]: Finished difference Result 104 states and 220 transitions. [2019-12-18 19:33:33,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 19:33:33,692 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 19:33:33,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:33,693 INFO L225 Difference]: With dead ends: 104 [2019-12-18 19:33:33,693 INFO L226 Difference]: Without dead ends: 103 [2019-12-18 19:33:33,693 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 19:33:33,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-12-18 19:33:33,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2019-12-18 19:33:33,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 19:33:33,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 19:33:33,697 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 19:33:33,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:33,697 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 19:33:33,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 19:33:33,698 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 19:33:33,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 19:33:33,698 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:33,698 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:33,899 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:33,899 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:33,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:33,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597744, now seen corresponding path program 8 times [2019-12-18 19:33:33,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:33,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285371142] [2019-12-18 19:33:33,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:33,987 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 19:33:33,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285371142] [2019-12-18 19:33:33,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097177898] [2019-12-18 19:33:33,988 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 19:33:34,053 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:33:34,053 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:34,055 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 19:33:34,056 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:34,151 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 19:33:34,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:34,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 19:33:34,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157148476] [2019-12-18 19:33:34,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 19:33:34,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:34,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 19:33:34,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:33:34,155 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 19:33:34,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:34,316 INFO L93 Difference]: Finished difference Result 110 states and 230 transitions. [2019-12-18 19:33:34,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 19:33:34,317 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 19:33:34,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:34,319 INFO L225 Difference]: With dead ends: 110 [2019-12-18 19:33:34,319 INFO L226 Difference]: Without dead ends: 108 [2019-12-18 19:33:34,319 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 19:33:34,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-18 19:33:34,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 84. [2019-12-18 19:33:34,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-18 19:33:34,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-18 19:33:34,325 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-18 19:33:34,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:34,326 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-18 19:33:34,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 19:33:34,326 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-18 19:33:34,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 19:33:34,326 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:34,327 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:34,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:34,531 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:34,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:34,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597899, now seen corresponding path program 9 times [2019-12-18 19:33:34,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:34,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980923140] [2019-12-18 19:33:34,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:34,602 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 19:33:34,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980923140] [2019-12-18 19:33:34,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362500481] [2019-12-18 19:33:34,603 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 19:33:34,678 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 19:33:34,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:34,680 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 19:33:34,681 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:34,842 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 19:33:34,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:34,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 19:33:34,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344206738] [2019-12-18 19:33:34,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 19:33:34,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:34,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 19:33:34,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:33:34,845 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-18 19:33:35,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:35,102 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-18 19:33:35,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 19:33:35,103 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 19:33:35,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:35,104 INFO L225 Difference]: With dead ends: 107 [2019-12-18 19:33:35,104 INFO L226 Difference]: Without dead ends: 106 [2019-12-18 19:33:35,105 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2019-12-18 19:33:35,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-18 19:33:35,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2019-12-18 19:33:35,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-18 19:33:35,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-18 19:33:35,108 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-18 19:33:35,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:35,108 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-18 19:33:35,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 19:33:35,108 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-18 19:33:35,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 19:33:35,109 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:35,109 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:35,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:35,315 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:35,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:35,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555214, now seen corresponding path program 10 times [2019-12-18 19:33:35,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:35,315 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537633421] [2019-12-18 19:33:35,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:35,389 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 19:33:35,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537633421] [2019-12-18 19:33:35,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198981290] [2019-12-18 19:33:35,390 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 19:33:35,463 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:33:35,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:35,464 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 19:33:35,468 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:35,540 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 19:33:35,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:35,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 19:33:35,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485940455] [2019-12-18 19:33:35,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 19:33:35,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:35,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 19:33:35,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:33:35,542 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-18 19:33:35,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:35,730 INFO L93 Difference]: Finished difference Result 117 states and 243 transitions. [2019-12-18 19:33:35,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 19:33:35,730 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 19:33:35,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:35,731 INFO L225 Difference]: With dead ends: 117 [2019-12-18 19:33:35,731 INFO L226 Difference]: Without dead ends: 115 [2019-12-18 19:33:35,732 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 19:33:35,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-18 19:33:35,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 83. [2019-12-18 19:33:35,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 19:33:35,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 183 transitions. [2019-12-18 19:33:35,735 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 183 transitions. Word has length 11 [2019-12-18 19:33:35,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:35,735 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 183 transitions. [2019-12-18 19:33:35,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 19:33:35,735 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 183 transitions. [2019-12-18 19:33:35,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 19:33:35,736 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:35,736 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:35,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:35,940 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:35,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:35,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1467559864, now seen corresponding path program 11 times [2019-12-18 19:33:35,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:35,941 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020637681] [2019-12-18 19:33:35,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:35,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:36,013 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 19:33:36,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020637681] [2019-12-18 19:33:36,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162379434] [2019-12-18 19:33:36,014 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 19:33:36,076 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:33:36,076 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:36,077 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 19:33:36,078 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:36,153 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 19:33:36,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:36,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 19:33:36,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445719060] [2019-12-18 19:33:36,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 19:33:36,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:36,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 19:33:36,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:33:36,155 INFO L87 Difference]: Start difference. First operand 83 states and 183 transitions. Second operand 12 states. [2019-12-18 19:33:36,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:36,310 INFO L93 Difference]: Finished difference Result 121 states and 250 transitions. [2019-12-18 19:33:36,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 19:33:36,310 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 19:33:36,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:36,311 INFO L225 Difference]: With dead ends: 121 [2019-12-18 19:33:36,311 INFO L226 Difference]: Without dead ends: 119 [2019-12-18 19:33:36,312 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 19:33:36,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-18 19:33:36,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 85. [2019-12-18 19:33:36,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 19:33:36,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 19:33:36,316 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 19:33:36,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:36,317 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 19:33:36,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 19:33:36,317 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 19:33:36,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 19:33:36,317 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:36,317 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:36,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:36,518 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:36,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:36,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1467560019, now seen corresponding path program 12 times [2019-12-18 19:33:36,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:36,520 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431561949] [2019-12-18 19:33:36,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:36,583 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 19:33:36,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431561949] [2019-12-18 19:33:36,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039007489] [2019-12-18 19:33:36,584 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 19:33:36,623 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 19:33:36,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:36,625 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 19:33:36,625 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:36,698 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 19:33:36,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:36,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 19:33:36,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234052274] [2019-12-18 19:33:36,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 19:33:36,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:36,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 19:33:36,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:33:36,700 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 19:33:36,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:36,884 INFO L93 Difference]: Finished difference Result 117 states and 243 transitions. [2019-12-18 19:33:36,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 19:33:36,885 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 19:33:36,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:36,886 INFO L225 Difference]: With dead ends: 117 [2019-12-18 19:33:36,886 INFO L226 Difference]: Without dead ends: 115 [2019-12-18 19:33:36,886 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 19:33:36,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-18 19:33:36,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 88. [2019-12-18 19:33:36,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-18 19:33:36,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 194 transitions. [2019-12-18 19:33:36,890 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 194 transitions. Word has length 11 [2019-12-18 19:33:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:36,890 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 194 transitions. [2019-12-18 19:33:36,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 19:33:36,890 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 194 transitions. [2019-12-18 19:33:36,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 19:33:36,891 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:36,891 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:37,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:37,095 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:37,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:37,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380934, now seen corresponding path program 13 times [2019-12-18 19:33:37,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:37,096 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031673522] [2019-12-18 19:33:37,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:37,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:37,161 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 19:33:37,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031673522] [2019-12-18 19:33:37,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951213671] [2019-12-18 19:33:37,162 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 19:33:37,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:37,215 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 19:33:37,216 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:37,282 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 19:33:37,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:37,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 19:33:37,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331599892] [2019-12-18 19:33:37,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 19:33:37,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:37,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 19:33:37,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:33:37,284 INFO L87 Difference]: Start difference. First operand 88 states and 194 transitions. Second operand 12 states. [2019-12-18 19:33:37,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:37,450 INFO L93 Difference]: Finished difference Result 108 states and 224 transitions. [2019-12-18 19:33:37,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 19:33:37,450 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 19:33:37,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:37,451 INFO L225 Difference]: With dead ends: 108 [2019-12-18 19:33:37,451 INFO L226 Difference]: Without dead ends: 107 [2019-12-18 19:33:37,452 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 19:33:37,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-12-18 19:33:37,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 86. [2019-12-18 19:33:37,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-18 19:33:37,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-18 19:33:37,456 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-18 19:33:37,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:37,456 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-18 19:33:37,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 19:33:37,456 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-18 19:33:37,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 19:33:37,457 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:37,457 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:37,660 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:37,660 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:37,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:37,661 INFO L82 PathProgramCache]: Analyzing trace with hash -2065667792, now seen corresponding path program 5 times [2019-12-18 19:33:37,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:37,661 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508113162] [2019-12-18 19:33:37,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:37,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:37,729 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 19:33:37,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508113162] [2019-12-18 19:33:37,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015192390] [2019-12-18 19:33:37,730 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 19:33:37,807 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:33:37,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:37,808 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:37,809 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:37,926 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 19:33:37,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:37,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:37,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283279052] [2019-12-18 19:33:37,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:37,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:37,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:37,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:37,928 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 14 states. [2019-12-18 19:33:38,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:38,050 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-18 19:33:38,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 19:33:38,051 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-18 19:33:38,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:38,052 INFO L225 Difference]: With dead ends: 107 [2019-12-18 19:33:38,052 INFO L226 Difference]: Without dead ends: 106 [2019-12-18 19:33:38,052 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 19:33:38,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-18 19:33:38,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2019-12-18 19:33:38,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-18 19:33:38,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-18 19:33:38,056 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-18 19:33:38,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:38,056 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-18 19:33:38,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:38,056 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-18 19:33:38,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:38,057 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:38,057 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:38,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:38,263 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:38,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:38,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1717033399, now seen corresponding path program 6 times [2019-12-18 19:33:38,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:38,264 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772234180] [2019-12-18 19:33:38,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:38,383 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 19:33:38,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772234180] [2019-12-18 19:33:38,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703239092] [2019-12-18 19:33:38,383 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 19:33:38,451 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 19:33:38,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:38,452 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 19:33:38,456 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:38,544 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 19:33:38,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 19:33:38,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 15 [2019-12-18 19:33:38,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818463837] [2019-12-18 19:33:38,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 19:33:38,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:38,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 19:33:38,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2019-12-18 19:33:38,546 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 8 states. [2019-12-18 19:33:38,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:38,575 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2019-12-18 19:33:38,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 19:33:38,576 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-18 19:33:38,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:38,578 INFO L225 Difference]: With dead ends: 124 [2019-12-18 19:33:38,578 INFO L226 Difference]: Without dead ends: 115 [2019-12-18 19:33:38,578 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 19:33:38,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-18 19:33:38,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2019-12-18 19:33:38,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-18 19:33:38,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 274 transitions. [2019-12-18 19:33:38,582 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 274 transitions. Word has length 12 [2019-12-18 19:33:38,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:38,583 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 274 transitions. [2019-12-18 19:33:38,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 19:33:38,583 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 274 transitions. [2019-12-18 19:33:38,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:38,583 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:38,583 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:38,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:38,787 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:38,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:38,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1717034515, now seen corresponding path program 14 times [2019-12-18 19:33:38,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:38,788 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370152048] [2019-12-18 19:33:38,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:38,865 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 19:33:38,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370152048] [2019-12-18 19:33:38,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408548571] [2019-12-18 19:33:38,866 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 19:33:38,915 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:33:38,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:38,916 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:38,924 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:39,025 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 19:33:39,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:39,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:39,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408136322] [2019-12-18 19:33:39,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:39,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:39,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:39,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:39,027 INFO L87 Difference]: Start difference. First operand 115 states and 274 transitions. Second operand 14 states. [2019-12-18 19:33:39,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:39,259 INFO L93 Difference]: Finished difference Result 137 states and 312 transitions. [2019-12-18 19:33:39,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 19:33:39,264 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:39,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:39,265 INFO L225 Difference]: With dead ends: 137 [2019-12-18 19:33:39,266 INFO L226 Difference]: Without dead ends: 136 [2019-12-18 19:33:39,266 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2019-12-18 19:33:39,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-12-18 19:33:39,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2019-12-18 19:33:39,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-18 19:33:39,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 279 transitions. [2019-12-18 19:33:39,271 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 279 transitions. Word has length 12 [2019-12-18 19:33:39,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:39,272 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 279 transitions. [2019-12-18 19:33:39,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:39,272 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 279 transitions. [2019-12-18 19:33:39,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:39,272 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:39,273 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:39,475 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:39,476 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:39,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:39,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1717068150, now seen corresponding path program 15 times [2019-12-18 19:33:39,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:39,478 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466453364] [2019-12-18 19:33:39,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:39,613 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 19:33:39,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466453364] [2019-12-18 19:33:39,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093130290] [2019-12-18 19:33:39,614 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 19:33:39,663 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 19:33:39,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:39,664 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:39,665 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:39,803 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 19:33:39,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:39,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:39,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929245028] [2019-12-18 19:33:39,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:39,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:39,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:39,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:39,805 INFO L87 Difference]: Start difference. First operand 117 states and 279 transitions. Second operand 14 states. [2019-12-18 19:33:40,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:40,110 INFO L93 Difference]: Finished difference Result 147 states and 334 transitions. [2019-12-18 19:33:40,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 19:33:40,111 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:40,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:40,113 INFO L225 Difference]: With dead ends: 147 [2019-12-18 19:33:40,113 INFO L226 Difference]: Without dead ends: 146 [2019-12-18 19:33:40,113 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 19:33:40,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-18 19:33:40,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 118. [2019-12-18 19:33:40,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-12-18 19:33:40,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 283 transitions. [2019-12-18 19:33:40,120 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 283 transitions. Word has length 12 [2019-12-18 19:33:40,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:40,121 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 283 transitions. [2019-12-18 19:33:40,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:40,121 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 283 transitions. [2019-12-18 19:33:40,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:40,122 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:40,122 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:40,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:40,325 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:40,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:40,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1717067995, now seen corresponding path program 16 times [2019-12-18 19:33:40,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:40,326 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246712279] [2019-12-18 19:33:40,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:40,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:40,394 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 19:33:40,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246712279] [2019-12-18 19:33:40,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101010697] [2019-12-18 19:33:40,395 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 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 19:33:40,441 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:33:40,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:40,442 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:40,442 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:40,606 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 19:33:40,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:40,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:40,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575173343] [2019-12-18 19:33:40,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:40,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:40,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:40,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:40,607 INFO L87 Difference]: Start difference. First operand 118 states and 283 transitions. Second operand 14 states. [2019-12-18 19:33:41,351 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2019-12-18 19:33:41,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:41,512 INFO L93 Difference]: Finished difference Result 150 states and 340 transitions. [2019-12-18 19:33:41,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 19:33:41,513 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:41,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:41,514 INFO L225 Difference]: With dead ends: 150 [2019-12-18 19:33:41,514 INFO L226 Difference]: Without dead ends: 149 [2019-12-18 19:33:41,514 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=316, Unknown=1, NotChecked=0, Total=462 [2019-12-18 19:33:41,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-18 19:33:41,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 119. [2019-12-18 19:33:41,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-18 19:33:41,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 284 transitions. [2019-12-18 19:33:41,519 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 284 transitions. Word has length 12 [2019-12-18 19:33:41,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:41,519 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 284 transitions. [2019-12-18 19:33:41,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:41,520 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 284 transitions. [2019-12-18 19:33:41,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:41,520 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:41,520 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:41,723 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:41,723 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:41,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:41,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110835, now seen corresponding path program 17 times [2019-12-18 19:33:41,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:41,724 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140564031] [2019-12-18 19:33:41,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:41,793 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 19:33:41,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140564031] [2019-12-18 19:33:41,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657134534] [2019-12-18 19:33:41,794 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 19:33:41,845 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:33:41,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:41,845 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:41,846 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:41,928 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 19:33:41,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:41,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:41,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062939719] [2019-12-18 19:33:41,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:41,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:41,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:41,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:41,931 INFO L87 Difference]: Start difference. First operand 119 states and 284 transitions. Second operand 14 states. [2019-12-18 19:33:42,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:42,171 INFO L93 Difference]: Finished difference Result 151 states and 339 transitions. [2019-12-18 19:33:42,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 19:33:42,171 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:42,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:42,173 INFO L225 Difference]: With dead ends: 151 [2019-12-18 19:33:42,173 INFO L226 Difference]: Without dead ends: 149 [2019-12-18 19:33:42,174 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2019-12-18 19:33:42,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-18 19:33:42,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 125. [2019-12-18 19:33:42,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-18 19:33:42,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 305 transitions. [2019-12-18 19:33:42,179 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 305 transitions. Word has length 12 [2019-12-18 19:33:42,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:42,180 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 305 transitions. [2019-12-18 19:33:42,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:42,180 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 305 transitions. [2019-12-18 19:33:42,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:42,180 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:42,181 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:42,383 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:42,384 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:42,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:42,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110680, now seen corresponding path program 18 times [2019-12-18 19:33:42,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:42,385 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331436022] [2019-12-18 19:33:42,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:42,478 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 19:33:42,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331436022] [2019-12-18 19:33:42,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878986809] [2019-12-18 19:33:42,478 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 19:33:42,529 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:33:42,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:42,530 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:42,536 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:42,649 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 19:33:42,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:42,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:42,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812726855] [2019-12-18 19:33:42,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:42,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:42,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:42,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:42,651 INFO L87 Difference]: Start difference. First operand 125 states and 305 transitions. Second operand 14 states. [2019-12-18 19:33:42,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:42,993 INFO L93 Difference]: Finished difference Result 166 states and 375 transitions. [2019-12-18 19:33:42,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 19:33:42,994 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:42,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:42,996 INFO L225 Difference]: With dead ends: 166 [2019-12-18 19:33:42,996 INFO L226 Difference]: Without dead ends: 164 [2019-12-18 19:33:42,996 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 19:33:42,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-12-18 19:33:43,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 123. [2019-12-18 19:33:43,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-12-18 19:33:43,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 297 transitions. [2019-12-18 19:33:43,001 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 297 transitions. Word has length 12 [2019-12-18 19:33:43,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:43,001 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 297 transitions. [2019-12-18 19:33:43,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:43,001 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 297 transitions. [2019-12-18 19:33:43,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:43,002 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:43,002 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:43,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:43,206 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:43,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:43,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1718106030, now seen corresponding path program 19 times [2019-12-18 19:33:43,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:43,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986211182] [2019-12-18 19:33:43,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:43,278 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 19:33:43,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986211182] [2019-12-18 19:33:43,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358177273] [2019-12-18 19:33:43,279 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 19:33:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:43,324 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:43,325 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:43,452 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 19:33:43,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:43,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:43,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32128846] [2019-12-18 19:33:43,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:43,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:43,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:43,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:43,453 INFO L87 Difference]: Start difference. First operand 123 states and 297 transitions. Second operand 14 states. [2019-12-18 19:33:43,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:43,787 INFO L93 Difference]: Finished difference Result 162 states and 367 transitions. [2019-12-18 19:33:43,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 19:33:43,794 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:43,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:43,795 INFO L225 Difference]: With dead ends: 162 [2019-12-18 19:33:43,796 INFO L226 Difference]: Without dead ends: 161 [2019-12-18 19:33:43,796 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-12-18 19:33:43,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-18 19:33:43,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 124. [2019-12-18 19:33:43,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 19:33:43,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 301 transitions. [2019-12-18 19:33:43,801 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 301 transitions. Word has length 12 [2019-12-18 19:33:43,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:43,801 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 301 transitions. [2019-12-18 19:33:43,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:43,801 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 301 transitions. [2019-12-18 19:33:43,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:43,802 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:43,802 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:44,006 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:44,006 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:44,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:44,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1718105875, now seen corresponding path program 20 times [2019-12-18 19:33:44,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:44,007 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562502949] [2019-12-18 19:33:44,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:44,081 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 19:33:44,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562502949] [2019-12-18 19:33:44,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642273009] [2019-12-18 19:33:44,082 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 19:33:44,129 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:33:44,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:44,130 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:44,131 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:44,280 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 19:33:44,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:44,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:44,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719018170] [2019-12-18 19:33:44,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:44,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:44,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:44,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:44,282 INFO L87 Difference]: Start difference. First operand 124 states and 301 transitions. Second operand 14 states. [2019-12-18 19:33:44,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:44,553 INFO L93 Difference]: Finished difference Result 153 states and 352 transitions. [2019-12-18 19:33:44,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 19:33:44,554 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:44,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:44,555 INFO L225 Difference]: With dead ends: 153 [2019-12-18 19:33:44,555 INFO L226 Difference]: Without dead ends: 152 [2019-12-18 19:33:44,556 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 19:33:44,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-18 19:33:44,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 124. [2019-12-18 19:33:44,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 19:33:44,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 298 transitions. [2019-12-18 19:33:44,561 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 298 transitions. Word has length 12 [2019-12-18 19:33:44,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:44,561 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 298 transitions. [2019-12-18 19:33:44,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:44,562 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 298 transitions. [2019-12-18 19:33:44,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:44,562 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:44,562 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:44,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:44,766 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:44,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:44,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429265, now seen corresponding path program 21 times [2019-12-18 19:33:44,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:44,767 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076323597] [2019-12-18 19:33:44,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:44,848 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 19:33:44,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076323597] [2019-12-18 19:33:44,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906732126] [2019-12-18 19:33:44,849 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 19:33:44,895 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 19:33:44,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:44,896 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:44,897 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:45,059 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 19:33:45,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:45,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:45,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344451077] [2019-12-18 19:33:45,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:45,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:45,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:45,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:45,062 INFO L87 Difference]: Start difference. First operand 124 states and 298 transitions. Second operand 14 states. [2019-12-18 19:33:46,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:46,850 INFO L93 Difference]: Finished difference Result 173 states and 385 transitions. [2019-12-18 19:33:46,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 19:33:46,850 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:46,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:46,852 INFO L225 Difference]: With dead ends: 173 [2019-12-18 19:33:46,852 INFO L226 Difference]: Without dead ends: 171 [2019-12-18 19:33:46,853 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=350, Unknown=0, NotChecked=0, Total=506 [2019-12-18 19:33:46,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-18 19:33:46,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 126. [2019-12-18 19:33:46,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-18 19:33:46,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 306 transitions. [2019-12-18 19:33:46,858 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 306 transitions. Word has length 12 [2019-12-18 19:33:46,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:46,858 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 306 transitions. [2019-12-18 19:33:46,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:46,858 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 306 transitions. [2019-12-18 19:33:46,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:46,859 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:46,859 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:47,062 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:47,062 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:47,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:47,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429110, now seen corresponding path program 22 times [2019-12-18 19:33:47,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:47,063 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703528429] [2019-12-18 19:33:47,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:47,137 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 19:33:47,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703528429] [2019-12-18 19:33:47,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546822097] [2019-12-18 19:33:47,137 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 19:33:47,178 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:33:47,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:47,178 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:47,179 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:47,269 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 19:33:47,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:47,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:47,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387388176] [2019-12-18 19:33:47,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:47,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:47,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:47,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:47,272 INFO L87 Difference]: Start difference. First operand 126 states and 306 transitions. Second operand 14 states. [2019-12-18 19:33:47,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:47,610 INFO L93 Difference]: Finished difference Result 171 states and 391 transitions. [2019-12-18 19:33:47,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 19:33:47,610 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:47,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:47,611 INFO L225 Difference]: With dead ends: 171 [2019-12-18 19:33:47,611 INFO L226 Difference]: Without dead ends: 169 [2019-12-18 19:33:47,612 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 19:33:47,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-12-18 19:33:47,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 124. [2019-12-18 19:33:47,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 19:33:47,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 307 transitions. [2019-12-18 19:33:47,616 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 307 transitions. Word has length 12 [2019-12-18 19:33:47,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:47,617 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 307 transitions. [2019-12-18 19:33:47,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:47,617 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 307 transitions. [2019-12-18 19:33:47,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:47,617 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:47,617 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:47,818 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:47,818 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:47,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:47,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1750285115, now seen corresponding path program 23 times [2019-12-18 19:33:47,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:47,819 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813724756] [2019-12-18 19:33:47,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:47,908 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 19:33:47,909 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813724756] [2019-12-18 19:33:47,909 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716839053] [2019-12-18 19:33:47,909 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 19:33:47,954 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:33:47,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:47,956 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:47,957 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:48,084 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 19:33:48,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:48,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:48,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042671523] [2019-12-18 19:33:48,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:48,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:48,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:48,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:48,086 INFO L87 Difference]: Start difference. First operand 124 states and 307 transitions. Second operand 14 states. [2019-12-18 19:33:48,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:48,472 INFO L93 Difference]: Finished difference Result 187 states and 421 transitions. [2019-12-18 19:33:48,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 19:33:48,473 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:48,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:48,474 INFO L225 Difference]: With dead ends: 187 [2019-12-18 19:33:48,474 INFO L226 Difference]: Without dead ends: 185 [2019-12-18 19:33:48,475 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2019-12-18 19:33:48,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-12-18 19:33:48,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 129. [2019-12-18 19:33:48,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-18 19:33:48,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 327 transitions. [2019-12-18 19:33:48,481 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 327 transitions. Word has length 12 [2019-12-18 19:33:48,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:48,481 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 327 transitions. [2019-12-18 19:33:48,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:48,482 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 327 transitions. [2019-12-18 19:33:48,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:48,483 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:48,483 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:48,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:48,687 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:48,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:48,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1750284960, now seen corresponding path program 24 times [2019-12-18 19:33:48,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:48,688 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736167826] [2019-12-18 19:33:48,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:48,756 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 19:33:48,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736167826] [2019-12-18 19:33:48,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277695926] [2019-12-18 19:33:48,756 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 19:33:48,803 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:33:48,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:48,804 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:48,805 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:48,889 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 19:33:48,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:48,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:48,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497609323] [2019-12-18 19:33:48,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:48,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:48,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:48,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:48,892 INFO L87 Difference]: Start difference. First operand 129 states and 327 transitions. Second operand 14 states. [2019-12-18 19:33:49,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:49,112 INFO L93 Difference]: Finished difference Result 180 states and 414 transitions. [2019-12-18 19:33:49,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 19:33:49,113 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:49,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:49,114 INFO L225 Difference]: With dead ends: 180 [2019-12-18 19:33:49,114 INFO L226 Difference]: Without dead ends: 178 [2019-12-18 19:33:49,115 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 19:33:49,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-18 19:33:49,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 126. [2019-12-18 19:33:49,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-18 19:33:49,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 315 transitions. [2019-12-18 19:33:49,120 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 315 transitions. Word has length 12 [2019-12-18 19:33:49,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:49,120 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 315 transitions. [2019-12-18 19:33:49,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:49,120 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 315 transitions. [2019-12-18 19:33:49,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:49,121 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:49,121 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:49,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:49,324 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:49,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:49,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1750280310, now seen corresponding path program 25 times [2019-12-18 19:33:49,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:49,324 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894670365] [2019-12-18 19:33:49,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:49,403 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 19:33:49,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894670365] [2019-12-18 19:33:49,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705332979] [2019-12-18 19:33:49,404 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 19:33:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:49,449 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:49,450 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:49,531 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 19:33:49,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:49,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:49,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394850032] [2019-12-18 19:33:49,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:49,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:49,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:49,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:49,533 INFO L87 Difference]: Start difference. First operand 126 states and 315 transitions. Second operand 14 states. [2019-12-18 19:33:49,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:49,816 INFO L93 Difference]: Finished difference Result 174 states and 399 transitions. [2019-12-18 19:33:49,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 19:33:49,817 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:49,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:49,818 INFO L225 Difference]: With dead ends: 174 [2019-12-18 19:33:49,818 INFO L226 Difference]: Without dead ends: 172 [2019-12-18 19:33:49,819 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 19:33:49,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-18 19:33:49,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 125. [2019-12-18 19:33:49,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-18 19:33:49,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 311 transitions. [2019-12-18 19:33:49,823 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 311 transitions. Word has length 12 [2019-12-18 19:33:49,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:49,823 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 311 transitions. [2019-12-18 19:33:49,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:49,824 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 311 transitions. [2019-12-18 19:33:49,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:49,824 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:49,824 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:50,027 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:50,028 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:50,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:50,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1542513096, now seen corresponding path program 26 times [2019-12-18 19:33:50,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:50,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435310423] [2019-12-18 19:33:50,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:50,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:50,102 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 19:33:50,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435310423] [2019-12-18 19:33:50,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949874712] [2019-12-18 19:33:50,103 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 19:33:50,146 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:33:50,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:50,147 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:50,148 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:50,237 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 19:33:50,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:50,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:50,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715678477] [2019-12-18 19:33:50,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:50,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:50,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:50,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:50,240 INFO L87 Difference]: Start difference. First operand 125 states and 311 transitions. Second operand 14 states. [2019-12-18 19:33:50,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:50,482 INFO L93 Difference]: Finished difference Result 154 states and 353 transitions. [2019-12-18 19:33:50,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 19:33:50,488 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:50,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:50,489 INFO L225 Difference]: With dead ends: 154 [2019-12-18 19:33:50,489 INFO L226 Difference]: Without dead ends: 153 [2019-12-18 19:33:50,490 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2019-12-18 19:33:50,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-18 19:33:50,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2019-12-18 19:33:50,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-18 19:33:50,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2019-12-18 19:33:50,493 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2019-12-18 19:33:50,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:50,494 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2019-12-18 19:33:50,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:50,494 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2019-12-18 19:33:50,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:50,495 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:50,495 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:50,698 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:50,698 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:50,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:50,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135351, now seen corresponding path program 27 times [2019-12-18 19:33:50,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:50,698 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883531124] [2019-12-18 19:33:50,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:50,759 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 19:33:50,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883531124] [2019-12-18 19:33:50,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121907004] [2019-12-18 19:33:50,760 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 19:33:50,808 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 19:33:50,809 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:50,809 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:50,810 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:50,897 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 19:33:50,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:50,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:50,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116309743] [2019-12-18 19:33:50,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:50,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:50,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:50,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:50,899 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 14 states. [2019-12-18 19:33:51,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:51,102 INFO L93 Difference]: Finished difference Result 174 states and 394 transitions. [2019-12-18 19:33:51,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 19:33:51,102 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:51,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:51,104 INFO L225 Difference]: With dead ends: 174 [2019-12-18 19:33:51,104 INFO L226 Difference]: Without dead ends: 173 [2019-12-18 19:33:51,104 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 19:33:51,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-18 19:33:51,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 127. [2019-12-18 19:33:51,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-18 19:33:51,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 307 transitions. [2019-12-18 19:33:51,109 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 307 transitions. Word has length 12 [2019-12-18 19:33:51,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:51,109 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 307 transitions. [2019-12-18 19:33:51,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:51,109 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 307 transitions. [2019-12-18 19:33:51,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:51,110 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:51,110 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:51,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:51,314 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:51,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:51,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1547284461, now seen corresponding path program 28 times [2019-12-18 19:33:51,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:51,315 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412283195] [2019-12-18 19:33:51,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:51,382 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 19:33:51,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412283195] [2019-12-18 19:33:51,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749000754] [2019-12-18 19:33:51,382 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 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 19:33:51,427 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:33:51,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:51,428 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:33:51,431 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:51,507 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 19:33:51,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:51,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 19:33:51,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433781418] [2019-12-18 19:33:51,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:33:51,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:51,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:33:51,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:33:51,510 INFO L87 Difference]: Start difference. First operand 127 states and 307 transitions. Second operand 14 states. [2019-12-18 19:33:51,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:51,730 INFO L93 Difference]: Finished difference Result 146 states and 330 transitions. [2019-12-18 19:33:51,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 19:33:51,731 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 19:33:51,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:51,732 INFO L225 Difference]: With dead ends: 146 [2019-12-18 19:33:51,733 INFO L226 Difference]: Without dead ends: 145 [2019-12-18 19:33:51,733 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2019-12-18 19:33:51,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-12-18 19:33:51,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 128. [2019-12-18 19:33:51,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-18 19:33:51,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 299 transitions. [2019-12-18 19:33:51,737 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 299 transitions. Word has length 12 [2019-12-18 19:33:51,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:51,738 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 299 transitions. [2019-12-18 19:33:51,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:33:51,738 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 299 transitions. [2019-12-18 19:33:51,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:33:51,738 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:51,738 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:51,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:51,942 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:51,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:51,942 INFO L82 PathProgramCache]: Analyzing trace with hash 388808531, now seen corresponding path program 6 times [2019-12-18 19:33:51,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:51,943 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85202731] [2019-12-18 19:33:51,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:52,024 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 19:33:52,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85202731] [2019-12-18 19:33:52,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64529971] [2019-12-18 19:33:52,025 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 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 19:33:52,068 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 19:33:52,068 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:52,069 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 19:33:52,069 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:52,131 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 19:33:52,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 19:33:52,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 15 [2019-12-18 19:33:52,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073969629] [2019-12-18 19:33:52,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 19:33:52,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:52,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 19:33:52,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2019-12-18 19:33:52,133 INFO L87 Difference]: Start difference. First operand 128 states and 299 transitions. Second operand 8 states. [2019-12-18 19:33:52,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:52,153 INFO L93 Difference]: Finished difference Result 159 states and 367 transitions. [2019-12-18 19:33:52,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 19:33:52,154 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-18 19:33:52,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:52,155 INFO L225 Difference]: With dead ends: 159 [2019-12-18 19:33:52,155 INFO L226 Difference]: Without dead ends: 152 [2019-12-18 19:33:52,155 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 19:33:52,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-18 19:33:52,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2019-12-18 19:33:52,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 19:33:52,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 354 transitions. [2019-12-18 19:33:52,160 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 354 transitions. Word has length 12 [2019-12-18 19:33:52,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:52,160 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 354 transitions. [2019-12-18 19:33:52,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 19:33:52,160 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 354 transitions. [2019-12-18 19:33:52,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:33:52,161 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:52,161 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:52,363 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:52,364 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:52,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:52,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1688429421, now seen corresponding path program 29 times [2019-12-18 19:33:52,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:52,365 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621243452] [2019-12-18 19:33:52,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:52,448 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 19:33:52,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621243452] [2019-12-18 19:33:52,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509562243] [2019-12-18 19:33:52,448 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 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 19:33:52,498 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:33:52,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:52,500 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:33:52,500 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:52,623 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 19:33:52,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:52,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:33:52,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967170861] [2019-12-18 19:33:52,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:33:52,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:52,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:33:52,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:33:52,625 INFO L87 Difference]: Start difference. First operand 152 states and 354 transitions. Second operand 16 states. [2019-12-18 19:33:52,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:52,912 INFO L93 Difference]: Finished difference Result 177 states and 402 transitions. [2019-12-18 19:33:52,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 19:33:52,912 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:33:52,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:52,914 INFO L225 Difference]: With dead ends: 177 [2019-12-18 19:33:52,914 INFO L226 Difference]: Without dead ends: 175 [2019-12-18 19:33:52,915 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 19:33:52,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-18 19:33:52,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 151. [2019-12-18 19:33:52,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-18 19:33:52,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 354 transitions. [2019-12-18 19:33:52,919 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 354 transitions. Word has length 13 [2019-12-18 19:33:52,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:52,919 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 354 transitions. [2019-12-18 19:33:52,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:33:52,920 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 354 transitions. [2019-12-18 19:33:52,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:33:52,920 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:52,920 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:53,123 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:53,124 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:53,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:53,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1688463056, now seen corresponding path program 30 times [2019-12-18 19:33:53,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:53,125 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386466303] [2019-12-18 19:33:53,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:53,205 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 19:33:53,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386466303] [2019-12-18 19:33:53,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30444137] [2019-12-18 19:33:53,206 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 19:33:53,256 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:33:53,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:53,257 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:33:53,258 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:53,371 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 19:33:53,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:53,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:33:53,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769583575] [2019-12-18 19:33:53,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:33:53,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:53,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:33:53,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:33:53,374 INFO L87 Difference]: Start difference. First operand 151 states and 354 transitions. Second operand 16 states. [2019-12-18 19:33:53,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:53,733 INFO L93 Difference]: Finished difference Result 187 states and 424 transitions. [2019-12-18 19:33:53,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 19:33:53,733 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:33:53,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:53,734 INFO L225 Difference]: With dead ends: 187 [2019-12-18 19:33:53,735 INFO L226 Difference]: Without dead ends: 186 [2019-12-18 19:33:53,735 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 19:33:53,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-18 19:33:53,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 153. [2019-12-18 19:33:53,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-18 19:33:53,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 362 transitions. [2019-12-18 19:33:53,740 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 362 transitions. Word has length 13 [2019-12-18 19:33:53,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:53,742 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 362 transitions. [2019-12-18 19:33:53,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:33:53,742 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 362 transitions. [2019-12-18 19:33:53,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:33:53,743 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:53,743 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:53,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:53,944 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:53,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:53,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1688462901, now seen corresponding path program 31 times [2019-12-18 19:33:53,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:53,945 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007772836] [2019-12-18 19:33:53,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:54,030 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 19:33:54,030 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007772836] [2019-12-18 19:33:54,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133679998] [2019-12-18 19:33:54,031 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 19:33:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:54,076 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:33:54,077 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:55,495 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 19:33:55,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:55,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:33:55,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877108310] [2019-12-18 19:33:55,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:33:55,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:55,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:33:55,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:33:55,497 INFO L87 Difference]: Start difference. First operand 153 states and 362 transitions. Second operand 16 states. [2019-12-18 19:33:56,388 WARN L192 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-12-18 19:33:56,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:56,424 INFO L93 Difference]: Finished difference Result 187 states and 425 transitions. [2019-12-18 19:33:56,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 19:33:56,425 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:33:56,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:56,426 INFO L225 Difference]: With dead ends: 187 [2019-12-18 19:33:56,427 INFO L226 Difference]: Without dead ends: 184 [2019-12-18 19:33:56,427 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2019-12-18 19:33:56,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-18 19:33:56,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 153. [2019-12-18 19:33:56,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-18 19:33:56,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 361 transitions. [2019-12-18 19:33:56,433 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 361 transitions. Word has length 13 [2019-12-18 19:33:56,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:56,433 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 361 transitions. [2019-12-18 19:33:56,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:33:56,433 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 361 transitions. [2019-12-18 19:33:56,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:33:56,434 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:56,434 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:56,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:56,637 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:56,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:56,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505741, now seen corresponding path program 32 times [2019-12-18 19:33:56,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:56,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738141151] [2019-12-18 19:33:56,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:56,732 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 19:33:56,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738141151] [2019-12-18 19:33:56,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685992153] [2019-12-18 19:33:56,733 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 19:33:56,780 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:33:56,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:56,780 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:33:56,781 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:56,898 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 19:33:56,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:56,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:33:56,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078773971] [2019-12-18 19:33:56,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:33:56,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:56,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:33:56,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:33:56,900 INFO L87 Difference]: Start difference. First operand 153 states and 361 transitions. Second operand 16 states. [2019-12-18 19:33:57,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:57,263 INFO L93 Difference]: Finished difference Result 196 states and 445 transitions. [2019-12-18 19:33:57,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 19:33:57,264 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:33:57,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:57,266 INFO L225 Difference]: With dead ends: 196 [2019-12-18 19:33:57,266 INFO L226 Difference]: Without dead ends: 194 [2019-12-18 19:33:57,266 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2019-12-18 19:33:57,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-12-18 19:33:57,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 160. [2019-12-18 19:33:57,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-12-18 19:33:57,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 389 transitions. [2019-12-18 19:33:57,271 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 389 transitions. Word has length 13 [2019-12-18 19:33:57,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:57,271 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 389 transitions. [2019-12-18 19:33:57,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:33:57,272 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 389 transitions. [2019-12-18 19:33:57,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:33:57,272 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:57,272 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:57,475 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:57,476 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:57,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:57,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505586, now seen corresponding path program 33 times [2019-12-18 19:33:57,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:57,476 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533671957] [2019-12-18 19:33:57,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:57,580 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 19:33:57,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533671957] [2019-12-18 19:33:57,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776095121] [2019-12-18 19:33:57,580 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 19:33:57,642 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 19:33:57,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:57,643 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:33:57,644 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:33:58,587 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 19:33:58,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:33:58,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:33:58,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127862909] [2019-12-18 19:33:58,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:33:58,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:33:58,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:33:58,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:33:58,588 INFO L87 Difference]: Start difference. First operand 160 states and 389 transitions. Second operand 16 states. [2019-12-18 19:33:59,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:33:59,203 INFO L93 Difference]: Finished difference Result 216 states and 489 transitions. [2019-12-18 19:33:59,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 19:33:59,203 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:33:59,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:33:59,205 INFO L225 Difference]: With dead ends: 216 [2019-12-18 19:33:59,205 INFO L226 Difference]: Without dead ends: 215 [2019-12-18 19:33:59,206 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2019-12-18 19:33:59,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-18 19:33:59,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 160. [2019-12-18 19:33:59,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-12-18 19:33:59,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 389 transitions. [2019-12-18 19:33:59,211 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 389 transitions. Word has length 13 [2019-12-18 19:33:59,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:33:59,211 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 389 transitions. [2019-12-18 19:33:59,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:33:59,212 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 389 transitions. [2019-12-18 19:33:59,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:33:59,212 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:33:59,212 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:33:59,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:33:59,416 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:33:59,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:33:59,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500936, now seen corresponding path program 34 times [2019-12-18 19:33:59,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:33:59,417 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073419681] [2019-12-18 19:33:59,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:33:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:33:59,496 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 19:33:59,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073419681] [2019-12-18 19:33:59,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627729360] [2019-12-18 19:33:59,497 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 19:33:59,541 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:33:59,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:33:59,542 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:33:59,542 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:01,730 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 19:34:01,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:01,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:01,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927637573] [2019-12-18 19:34:01,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:01,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:01,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:01,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=175, Unknown=4, NotChecked=0, Total=240 [2019-12-18 19:34:01,732 INFO L87 Difference]: Start difference. First operand 160 states and 389 transitions. Second operand 16 states. [2019-12-18 19:34:02,218 WARN L192 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2019-12-18 19:34:04,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:04,896 INFO L93 Difference]: Finished difference Result 209 states and 479 transitions. [2019-12-18 19:34:04,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 19:34:04,897 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:04,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:04,898 INFO L225 Difference]: With dead ends: 209 [2019-12-18 19:34:04,898 INFO L226 Difference]: Without dead ends: 208 [2019-12-18 19:34:04,899 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=184, Invalid=411, Unknown=5, NotChecked=0, Total=600 [2019-12-18 19:34:04,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-12-18 19:34:04,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 161. [2019-12-18 19:34:04,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-18 19:34:04,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 393 transitions. [2019-12-18 19:34:04,904 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 393 transitions. Word has length 13 [2019-12-18 19:34:04,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:04,904 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 393 transitions. [2019-12-18 19:34:04,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:04,904 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 393 transitions. [2019-12-18 19:34:04,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:04,905 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:04,905 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:05,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:05,108 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:05,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:05,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500781, now seen corresponding path program 35 times [2019-12-18 19:34:05,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:05,109 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960758072] [2019-12-18 19:34:05,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:05,188 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 19:34:05,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960758072] [2019-12-18 19:34:05,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214243970] [2019-12-18 19:34:05,188 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 19:34:05,230 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:34:05,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:05,231 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:05,232 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:06,739 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 19:34:06,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:06,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:06,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122128026] [2019-12-18 19:34:06,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:06,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:06,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:06,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:06,741 INFO L87 Difference]: Start difference. First operand 161 states and 393 transitions. Second operand 16 states. [2019-12-18 19:34:10,028 WARN L192 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 19:34:10,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:10,697 INFO L93 Difference]: Finished difference Result 205 states and 469 transitions. [2019-12-18 19:34:10,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 19:34:10,697 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:10,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:10,699 INFO L225 Difference]: With dead ends: 205 [2019-12-18 19:34:10,699 INFO L226 Difference]: Without dead ends: 201 [2019-12-18 19:34:10,700 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=230, Invalid=523, Unknown=3, NotChecked=0, Total=756 [2019-12-18 19:34:10,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-12-18 19:34:10,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 160. [2019-12-18 19:34:10,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-12-18 19:34:10,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 388 transitions. [2019-12-18 19:34:10,704 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 388 transitions. Word has length 13 [2019-12-18 19:34:10,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:10,704 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 388 transitions. [2019-12-18 19:34:10,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:10,705 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 388 transitions. [2019-12-18 19:34:10,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:10,705 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:10,705 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:10,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:10,909 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:10,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:10,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828821, now seen corresponding path program 36 times [2019-12-18 19:34:10,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:10,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653840381] [2019-12-18 19:34:10,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:10,999 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 19:34:10,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653840381] [2019-12-18 19:34:10,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358890983] [2019-12-18 19:34:10,999 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 19:34:11,043 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:34:11,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:11,044 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:11,045 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:11,168 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 19:34:11,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:11,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:11,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990338873] [2019-12-18 19:34:11,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:11,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:11,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:11,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:11,170 INFO L87 Difference]: Start difference. First operand 160 states and 388 transitions. Second operand 16 states. [2019-12-18 19:34:11,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:11,613 INFO L93 Difference]: Finished difference Result 231 states and 523 transitions. [2019-12-18 19:34:11,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 19:34:11,614 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:11,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:11,616 INFO L225 Difference]: With dead ends: 231 [2019-12-18 19:34:11,616 INFO L226 Difference]: Without dead ends: 229 [2019-12-18 19:34:11,617 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 19:34:11,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-12-18 19:34:11,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 164. [2019-12-18 19:34:11,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-12-18 19:34:11,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2019-12-18 19:34:11,621 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 13 [2019-12-18 19:34:11,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:11,621 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2019-12-18 19:34:11,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:11,621 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2019-12-18 19:34:11,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:11,622 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:11,622 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:11,825 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:11,825 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:11,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:11,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824171, now seen corresponding path program 37 times [2019-12-18 19:34:11,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:11,826 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670956665] [2019-12-18 19:34:11,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:11,896 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 19:34:11,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670956665] [2019-12-18 19:34:11,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761151492] [2019-12-18 19:34:11,897 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 19:34:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:11,947 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:11,948 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:12,111 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 19:34:12,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:12,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:12,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060850414] [2019-12-18 19:34:12,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:12,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:12,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:12,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:12,113 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 16 states. [2019-12-18 19:34:12,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:12,514 INFO L93 Difference]: Finished difference Result 240 states and 544 transitions. [2019-12-18 19:34:12,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 19:34:12,515 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:12,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:12,517 INFO L225 Difference]: With dead ends: 240 [2019-12-18 19:34:12,517 INFO L226 Difference]: Without dead ends: 238 [2019-12-18 19:34:12,518 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2019-12-18 19:34:12,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-12-18 19:34:12,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 166. [2019-12-18 19:34:12,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-12-18 19:34:12,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 412 transitions. [2019-12-18 19:34:12,522 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 412 transitions. Word has length 13 [2019-12-18 19:34:12,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:12,522 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 412 transitions. [2019-12-18 19:34:12,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:12,522 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 412 transitions. [2019-12-18 19:34:12,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:12,523 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:12,523 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:12,723 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:12,724 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:12,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:12,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824016, now seen corresponding path program 38 times [2019-12-18 19:34:12,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:12,725 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869536156] [2019-12-18 19:34:12,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:12,803 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 19:34:12,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869536156] [2019-12-18 19:34:12,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255108074] [2019-12-18 19:34:12,804 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 19:34:12,845 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:34:12,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:12,846 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:12,847 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:13,003 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 19:34:13,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:13,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:13,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530653020] [2019-12-18 19:34:13,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:13,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:13,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:13,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:13,005 INFO L87 Difference]: Start difference. First operand 166 states and 412 transitions. Second operand 16 states. [2019-12-18 19:34:13,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:13,609 INFO L93 Difference]: Finished difference Result 237 states and 538 transitions. [2019-12-18 19:34:13,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 19:34:13,609 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:13,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:13,611 INFO L225 Difference]: With dead ends: 237 [2019-12-18 19:34:13,612 INFO L226 Difference]: Without dead ends: 231 [2019-12-18 19:34:13,613 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 19:34:13,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-12-18 19:34:13,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 168. [2019-12-18 19:34:13,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-12-18 19:34:13,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 417 transitions. [2019-12-18 19:34:13,618 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 417 transitions. Word has length 13 [2019-12-18 19:34:13,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:13,618 INFO L462 AbstractCegarLoop]: Abstraction has 168 states and 417 transitions. [2019-12-18 19:34:13,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:13,620 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 417 transitions. [2019-12-18 19:34:13,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:13,621 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:13,621 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:13,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:13,824 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:13,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:13,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1721680021, now seen corresponding path program 39 times [2019-12-18 19:34:13,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:13,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451613218] [2019-12-18 19:34:13,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:13,901 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 19:34:13,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451613218] [2019-12-18 19:34:13,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393465234] [2019-12-18 19:34:13,901 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 19:34:13,942 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 19:34:13,943 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:13,943 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:13,944 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:14,112 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 19:34:14,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:14,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:14,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311917375] [2019-12-18 19:34:14,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:14,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:14,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:14,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:14,115 INFO L87 Difference]: Start difference. First operand 168 states and 417 transitions. Second operand 16 states. [2019-12-18 19:34:14,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:14,580 INFO L93 Difference]: Finished difference Result 228 states and 528 transitions. [2019-12-18 19:34:14,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 19:34:14,581 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:14,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:14,583 INFO L225 Difference]: With dead ends: 228 [2019-12-18 19:34:14,583 INFO L226 Difference]: Without dead ends: 227 [2019-12-18 19:34:14,583 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2019-12-18 19:34:14,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-18 19:34:14,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 169. [2019-12-18 19:34:14,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-12-18 19:34:14,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 421 transitions. [2019-12-18 19:34:14,588 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 421 transitions. Word has length 13 [2019-12-18 19:34:14,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:14,589 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 421 transitions. [2019-12-18 19:34:14,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:14,589 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 421 transitions. [2019-12-18 19:34:14,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:14,589 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:14,589 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:14,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:14,793 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:14,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:14,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1721679866, now seen corresponding path program 40 times [2019-12-18 19:34:14,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:14,794 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210599230] [2019-12-18 19:34:14,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:14,873 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 19:34:14,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210599230] [2019-12-18 19:34:14,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968370029] [2019-12-18 19:34:14,875 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 19:34:14,921 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:34:14,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:14,922 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:14,923 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:15,115 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 19:34:15,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:15,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:15,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819375449] [2019-12-18 19:34:15,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:15,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:15,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:15,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:15,117 INFO L87 Difference]: Start difference. First operand 169 states and 421 transitions. Second operand 16 states. [2019-12-18 19:34:15,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:15,540 INFO L93 Difference]: Finished difference Result 233 states and 540 transitions. [2019-12-18 19:34:15,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 19:34:15,541 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:15,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:15,543 INFO L225 Difference]: With dead ends: 233 [2019-12-18 19:34:15,543 INFO L226 Difference]: Without dead ends: 232 [2019-12-18 19:34:15,543 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 19:34:15,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2019-12-18 19:34:15,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2019-12-18 19:34:15,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-12-18 19:34:15,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 417 transitions. [2019-12-18 19:34:15,548 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 417 transitions. Word has length 13 [2019-12-18 19:34:15,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:15,548 INFO L462 AbstractCegarLoop]: Abstraction has 168 states and 417 transitions. [2019-12-18 19:34:15,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:15,548 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 417 transitions. [2019-12-18 19:34:15,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:15,549 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:15,549 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:15,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:15,752 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:15,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:15,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1721675216, now seen corresponding path program 41 times [2019-12-18 19:34:15,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:15,753 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964435443] [2019-12-18 19:34:15,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:15,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:15,825 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 19:34:15,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964435443] [2019-12-18 19:34:15,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160150003] [2019-12-18 19:34:15,826 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 19:34:15,870 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:34:15,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:15,871 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:15,872 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:20,059 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 19:34:20,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:20,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:20,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567724039] [2019-12-18 19:34:20,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:20,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:20,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:20,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:20,060 INFO L87 Difference]: Start difference. First operand 168 states and 417 transitions. Second operand 16 states. [2019-12-18 19:34:22,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:22,547 INFO L93 Difference]: Finished difference Result 222 states and 514 transitions. [2019-12-18 19:34:22,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 19:34:22,547 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:22,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:22,549 INFO L225 Difference]: With dead ends: 222 [2019-12-18 19:34:22,549 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 19:34:22,550 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2019-12-18 19:34:22,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 19:34:22,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 166. [2019-12-18 19:34:22,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-12-18 19:34:22,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2019-12-18 19:34:22,553 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 13 [2019-12-18 19:34:22,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:22,553 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2019-12-18 19:34:22,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:22,554 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2019-12-18 19:34:22,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:22,554 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:22,554 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:22,757 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:22,757 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:22,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:22,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118035, now seen corresponding path program 42 times [2019-12-18 19:34:22,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:22,758 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116657613] [2019-12-18 19:34:22,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:22,829 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 19:34:22,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116657613] [2019-12-18 19:34:22,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769577206] [2019-12-18 19:34:22,830 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 19:34:22,875 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:34:22,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:22,876 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:22,877 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:23,003 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 19:34:23,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:23,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:23,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729572353] [2019-12-18 19:34:23,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:23,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:23,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:23,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:23,004 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 16 states. [2019-12-18 19:34:23,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:23,292 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2019-12-18 19:34:23,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 19:34:23,292 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:23,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:23,295 INFO L225 Difference]: With dead ends: 180 [2019-12-18 19:34:23,295 INFO L226 Difference]: Without dead ends: 172 [2019-12-18 19:34:23,295 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 19:34:23,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-18 19:34:23,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 167. [2019-12-18 19:34:23,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-12-18 19:34:23,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 407 transitions. [2019-12-18 19:34:23,306 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 407 transitions. Word has length 13 [2019-12-18 19:34:23,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:23,306 INFO L462 AbstractCegarLoop]: Abstraction has 167 states and 407 transitions. [2019-12-18 19:34:23,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:23,306 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 407 transitions. [2019-12-18 19:34:23,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:23,306 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:23,306 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:23,511 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:23,511 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:23,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:23,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1571266990, now seen corresponding path program 43 times [2019-12-18 19:34:23,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:23,512 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770213491] [2019-12-18 19:34:23,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:23,601 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 19:34:23,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770213491] [2019-12-18 19:34:23,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100479554] [2019-12-18 19:34:23,601 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 19:34:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:23,665 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:23,666 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:24,580 WARN L192 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 19:34:24,581 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 19:34:24,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:24,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:24,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714170499] [2019-12-18 19:34:24,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:24,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:24,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:24,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:24,582 INFO L87 Difference]: Start difference. First operand 167 states and 407 transitions. Second operand 16 states. [2019-12-18 19:34:25,047 WARN L192 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-18 19:34:25,579 WARN L192 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 19:34:25,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:25,731 INFO L93 Difference]: Finished difference Result 231 states and 527 transitions. [2019-12-18 19:34:25,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 19:34:25,731 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:25,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:25,733 INFO L225 Difference]: With dead ends: 231 [2019-12-18 19:34:25,733 INFO L226 Difference]: Without dead ends: 226 [2019-12-18 19:34:25,734 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2019-12-18 19:34:25,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-18 19:34:25,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 170. [2019-12-18 19:34:25,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-12-18 19:34:25,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 417 transitions. [2019-12-18 19:34:25,738 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 417 transitions. Word has length 13 [2019-12-18 19:34:25,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:25,739 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 417 transitions. [2019-12-18 19:34:25,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:25,739 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 417 transitions. [2019-12-18 19:34:25,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:25,739 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:25,739 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:25,940 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:25,940 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:25,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:25,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1571267145, now seen corresponding path program 44 times [2019-12-18 19:34:25,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:25,941 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109902732] [2019-12-18 19:34:25,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:26,027 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 19:34:26,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109902732] [2019-12-18 19:34:26,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184777858] [2019-12-18 19:34:26,028 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 19:34:26,068 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:34:26,068 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:26,069 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:26,070 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:26,360 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 19:34:26,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:26,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:26,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265338695] [2019-12-18 19:34:26,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:26,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:26,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:26,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:26,362 INFO L87 Difference]: Start difference. First operand 170 states and 417 transitions. Second operand 16 states. [2019-12-18 19:34:26,878 WARN L192 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-18 19:34:28,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:28,568 INFO L93 Difference]: Finished difference Result 258 states and 587 transitions. [2019-12-18 19:34:28,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 19:34:28,568 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:28,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:28,570 INFO L225 Difference]: With dead ends: 258 [2019-12-18 19:34:28,571 INFO L226 Difference]: Without dead ends: 256 [2019-12-18 19:34:28,571 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2019-12-18 19:34:28,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-12-18 19:34:28,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 173. [2019-12-18 19:34:28,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-12-18 19:34:28,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 430 transitions. [2019-12-18 19:34:28,575 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 430 transitions. Word has length 13 [2019-12-18 19:34:28,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:28,575 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 430 transitions. [2019-12-18 19:34:28,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:28,576 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 430 transitions. [2019-12-18 19:34:28,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:28,576 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:28,576 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:28,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:28,777 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:28,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:28,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1571271795, now seen corresponding path program 45 times [2019-12-18 19:34:28,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:28,778 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739313308] [2019-12-18 19:34:28,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:28,858 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 19:34:28,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739313308] [2019-12-18 19:34:28,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972374202] [2019-12-18 19:34:28,858 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 19:34:28,900 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 19:34:28,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:28,901 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:28,902 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:29,030 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 19:34:29,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:29,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:29,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374543962] [2019-12-18 19:34:29,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:29,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:29,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:29,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:29,032 INFO L87 Difference]: Start difference. First operand 173 states and 430 transitions. Second operand 16 states. [2019-12-18 19:34:29,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:29,540 INFO L93 Difference]: Finished difference Result 257 states and 583 transitions. [2019-12-18 19:34:29,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:34:29,541 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:29,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:29,543 INFO L225 Difference]: With dead ends: 257 [2019-12-18 19:34:29,543 INFO L226 Difference]: Without dead ends: 255 [2019-12-18 19:34:29,543 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2019-12-18 19:34:29,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2019-12-18 19:34:29,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 175. [2019-12-18 19:34:29,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-12-18 19:34:29,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 438 transitions. [2019-12-18 19:34:29,547 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 438 transitions. Word has length 13 [2019-12-18 19:34:29,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:29,547 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 438 transitions. [2019-12-18 19:34:29,547 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:29,547 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 438 transitions. [2019-12-18 19:34:29,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:29,547 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:29,548 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:29,748 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:29,748 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:29,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:29,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735640, now seen corresponding path program 46 times [2019-12-18 19:34:29,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:29,749 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817114791] [2019-12-18 19:34:29,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:29,818 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 19:34:29,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817114791] [2019-12-18 19:34:29,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672192435] [2019-12-18 19:34:29,819 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 19:34:29,863 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:34:29,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:29,864 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:29,864 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:29,953 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 19:34:29,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:29,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:29,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90410179] [2019-12-18 19:34:29,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:29,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:29,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:29,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:29,955 INFO L87 Difference]: Start difference. First operand 175 states and 438 transitions. Second operand 16 states. [2019-12-18 19:34:30,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:30,348 INFO L93 Difference]: Finished difference Result 241 states and 556 transitions. [2019-12-18 19:34:30,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 19:34:30,349 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:30,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:30,351 INFO L225 Difference]: With dead ends: 241 [2019-12-18 19:34:30,351 INFO L226 Difference]: Without dead ends: 231 [2019-12-18 19:34:30,351 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 19:34:30,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-12-18 19:34:30,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 177. [2019-12-18 19:34:30,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-12-18 19:34:30,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 441 transitions. [2019-12-18 19:34:30,355 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 441 transitions. Word has length 13 [2019-12-18 19:34:30,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:30,356 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 441 transitions. [2019-12-18 19:34:30,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:30,356 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 441 transitions. [2019-12-18 19:34:30,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:30,356 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:30,356 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:30,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:30,558 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:30,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:30,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735795, now seen corresponding path program 47 times [2019-12-18 19:34:30,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:30,559 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995196922] [2019-12-18 19:34:30,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:30,633 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 19:34:30,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995196922] [2019-12-18 19:34:30,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973019232] [2019-12-18 19:34:30,634 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 19:34:30,676 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:34:30,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:30,678 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:30,678 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:30,769 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 19:34:30,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:30,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:30,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931613597] [2019-12-18 19:34:30,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:30,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:30,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:30,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:30,771 INFO L87 Difference]: Start difference. First operand 177 states and 441 transitions. Second operand 16 states. [2019-12-18 19:34:31,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:31,153 INFO L93 Difference]: Finished difference Result 259 states and 592 transitions. [2019-12-18 19:34:31,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:34:31,153 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:31,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:31,155 INFO L225 Difference]: With dead ends: 259 [2019-12-18 19:34:31,156 INFO L226 Difference]: Without dead ends: 257 [2019-12-18 19:34:31,156 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 19:34:31,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2019-12-18 19:34:31,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 176. [2019-12-18 19:34:31,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-12-18 19:34:31,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 438 transitions. [2019-12-18 19:34:31,160 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 438 transitions. Word has length 13 [2019-12-18 19:34:31,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:31,160 INFO L462 AbstractCegarLoop]: Abstraction has 176 states and 438 transitions. [2019-12-18 19:34:31,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:31,160 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 438 transitions. [2019-12-18 19:34:31,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:31,160 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:31,160 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:31,361 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:31,361 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:31,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:31,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740445, now seen corresponding path program 48 times [2019-12-18 19:34:31,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:31,362 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740009098] [2019-12-18 19:34:31,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:31,455 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 19:34:31,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740009098] [2019-12-18 19:34:31,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947161149] [2019-12-18 19:34:31,456 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 19:34:31,514 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:34:31,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:31,514 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:31,515 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:31,608 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 19:34:31,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:31,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:31,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111569910] [2019-12-18 19:34:31,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:31,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:31,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:31,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:31,610 INFO L87 Difference]: Start difference. First operand 176 states and 438 transitions. Second operand 16 states. [2019-12-18 19:34:31,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:31,894 INFO L93 Difference]: Finished difference Result 258 states and 586 transitions. [2019-12-18 19:34:31,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 19:34:31,894 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:31,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:31,897 INFO L225 Difference]: With dead ends: 258 [2019-12-18 19:34:31,897 INFO L226 Difference]: Without dead ends: 256 [2019-12-18 19:34:31,897 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 19:34:31,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-12-18 19:34:31,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 175. [2019-12-18 19:34:31,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-12-18 19:34:31,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 435 transitions. [2019-12-18 19:34:31,902 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 435 transitions. Word has length 13 [2019-12-18 19:34:31,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:31,902 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 435 transitions. [2019-12-18 19:34:31,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:31,902 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 435 transitions. [2019-12-18 19:34:31,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:31,903 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:31,903 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:32,105 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:32,106 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:32,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:32,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740600, now seen corresponding path program 49 times [2019-12-18 19:34:32,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:32,107 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248097236] [2019-12-18 19:34:32,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:32,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:32,191 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 19:34:32,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248097236] [2019-12-18 19:34:32,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004509371] [2019-12-18 19:34:32,192 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 19:34:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:32,236 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:32,236 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:32,335 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 19:34:32,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:32,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:32,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762657438] [2019-12-18 19:34:32,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:32,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:32,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:32,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:32,337 INFO L87 Difference]: Start difference. First operand 175 states and 435 transitions. Second operand 16 states. [2019-12-18 19:34:32,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:32,718 INFO L93 Difference]: Finished difference Result 249 states and 567 transitions. [2019-12-18 19:34:32,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 19:34:32,719 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:32,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:32,721 INFO L225 Difference]: With dead ends: 249 [2019-12-18 19:34:32,721 INFO L226 Difference]: Without dead ends: 242 [2019-12-18 19:34:32,721 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 19:34:32,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-12-18 19:34:32,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 173. [2019-12-18 19:34:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-12-18 19:34:32,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 424 transitions. [2019-12-18 19:34:32,725 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 424 transitions. Word has length 13 [2019-12-18 19:34:32,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:32,725 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 424 transitions. [2019-12-18 19:34:32,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:32,725 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 424 transitions. [2019-12-18 19:34:32,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:32,726 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:32,726 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:32,928 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:32,929 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:32,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:32,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1575884595, now seen corresponding path program 50 times [2019-12-18 19:34:32,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:32,930 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666788966] [2019-12-18 19:34:32,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:33,020 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 19:34:33,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666788966] [2019-12-18 19:34:33,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763963035] [2019-12-18 19:34:33,020 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 19:34:33,073 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:34:33,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:33,074 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:33,075 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:33,226 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 19:34:33,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:33,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:33,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788327967] [2019-12-18 19:34:33,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:33,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:33,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:33,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:33,228 INFO L87 Difference]: Start difference. First operand 173 states and 424 transitions. Second operand 16 states. [2019-12-18 19:34:33,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:33,659 INFO L93 Difference]: Finished difference Result 240 states and 545 transitions. [2019-12-18 19:34:33,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:34:33,660 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:33,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:33,662 INFO L225 Difference]: With dead ends: 240 [2019-12-18 19:34:33,662 INFO L226 Difference]: Without dead ends: 238 [2019-12-18 19:34:33,662 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 19:34:33,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-12-18 19:34:33,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 169. [2019-12-18 19:34:33,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-12-18 19:34:33,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 410 transitions. [2019-12-18 19:34:33,667 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 410 transitions. Word has length 13 [2019-12-18 19:34:33,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:33,667 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 410 transitions. [2019-12-18 19:34:33,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:33,667 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 410 transitions. [2019-12-18 19:34:33,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:33,668 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:33,668 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:33,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:33,868 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:33,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:33,869 INFO L82 PathProgramCache]: Analyzing trace with hash -573260427, now seen corresponding path program 51 times [2019-12-18 19:34:33,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:33,870 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120032066] [2019-12-18 19:34:33,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:33,944 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 19:34:33,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120032066] [2019-12-18 19:34:33,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410699585] [2019-12-18 19:34:33,944 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 19:34:33,990 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 19:34:33,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:33,990 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:33,991 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:34,099 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 19:34:34,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:34,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:34,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252351689] [2019-12-18 19:34:34,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:34,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:34,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:34,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:34,101 INFO L87 Difference]: Start difference. First operand 169 states and 410 transitions. Second operand 16 states. [2019-12-18 19:34:34,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:34,389 INFO L93 Difference]: Finished difference Result 185 states and 433 transitions. [2019-12-18 19:34:34,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 19:34:34,389 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:34,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:34,391 INFO L225 Difference]: With dead ends: 185 [2019-12-18 19:34:34,391 INFO L226 Difference]: Without dead ends: 183 [2019-12-18 19:34:34,391 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2019-12-18 19:34:34,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-18 19:34:34,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 165. [2019-12-18 19:34:34,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-12-18 19:34:34,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 406 transitions. [2019-12-18 19:34:34,395 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 406 transitions. Word has length 13 [2019-12-18 19:34:34,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:34,395 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 406 transitions. [2019-12-18 19:34:34,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:34,395 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 406 transitions. [2019-12-18 19:34:34,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:34,396 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:34,396 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:34,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:34,599 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:34,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:34,599 INFO L82 PathProgramCache]: Analyzing trace with hash -573265077, now seen corresponding path program 52 times [2019-12-18 19:34:34,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:34,600 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568855629] [2019-12-18 19:34:34,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:34,672 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 19:34:34,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568855629] [2019-12-18 19:34:34,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395438659] [2019-12-18 19:34:34,673 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 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 19:34:34,716 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:34:34,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:34,717 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:34,717 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:35,526 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 19:34:35,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:35,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:35,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306642527] [2019-12-18 19:34:35,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:35,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:35,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:35,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=179, Unknown=1, NotChecked=0, Total=240 [2019-12-18 19:34:35,528 INFO L87 Difference]: Start difference. First operand 165 states and 406 transitions. Second operand 16 states. [2019-12-18 19:34:37,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:37,184 INFO L93 Difference]: Finished difference Result 187 states and 433 transitions. [2019-12-18 19:34:37,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 19:34:37,184 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:37,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:37,186 INFO L225 Difference]: With dead ends: 187 [2019-12-18 19:34:37,186 INFO L226 Difference]: Without dead ends: 184 [2019-12-18 19:34:37,186 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=219, Invalid=480, Unknown=3, NotChecked=0, Total=702 [2019-12-18 19:34:37,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-18 19:34:37,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 161. [2019-12-18 19:34:37,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-18 19:34:37,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 393 transitions. [2019-12-18 19:34:37,190 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 393 transitions. Word has length 13 [2019-12-18 19:34:37,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:37,190 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 393 transitions. [2019-12-18 19:34:37,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:37,190 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 393 transitions. [2019-12-18 19:34:37,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:37,191 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:37,191 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:37,394 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:37,394 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:37,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:37,395 INFO L82 PathProgramCache]: Analyzing trace with hash -573265232, now seen corresponding path program 53 times [2019-12-18 19:34:37,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:37,395 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064509070] [2019-12-18 19:34:37,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:37,468 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 19:34:37,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064509070] [2019-12-18 19:34:37,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722581761] [2019-12-18 19:34:37,469 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 19:34:37,512 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:34:37,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:37,513 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:37,514 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:37,633 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 19:34:37,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:37,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:37,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45746682] [2019-12-18 19:34:37,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:37,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:37,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:37,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:37,635 INFO L87 Difference]: Start difference. First operand 161 states and 393 transitions. Second operand 16 states. [2019-12-18 19:34:37,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:37,955 INFO L93 Difference]: Finished difference Result 187 states and 430 transitions. [2019-12-18 19:34:37,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 19:34:37,955 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:37,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:37,957 INFO L225 Difference]: With dead ends: 187 [2019-12-18 19:34:37,957 INFO L226 Difference]: Without dead ends: 186 [2019-12-18 19:34:37,957 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 19:34:37,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-18 19:34:37,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 160. [2019-12-18 19:34:37,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-12-18 19:34:37,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2019-12-18 19:34:37,961 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 13 [2019-12-18 19:34:37,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:37,962 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2019-12-18 19:34:37,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:37,962 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2019-12-18 19:34:37,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:37,962 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:37,962 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:38,165 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:38,166 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:38,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:38,166 INFO L82 PathProgramCache]: Analyzing trace with hash -573414187, now seen corresponding path program 54 times [2019-12-18 19:34:38,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:38,167 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075023548] [2019-12-18 19:34:38,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:38,249 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 19:34:38,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075023548] [2019-12-18 19:34:38,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855416755] [2019-12-18 19:34:38,250 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 19:34:38,291 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 19:34:38,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:38,292 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:38,293 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:38,433 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 19:34:38,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:38,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:38,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399811516] [2019-12-18 19:34:38,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:38,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:38,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:38,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:38,435 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 16 states. [2019-12-18 19:34:38,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:38,933 INFO L93 Difference]: Finished difference Result 194 states and 441 transitions. [2019-12-18 19:34:38,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 19:34:38,934 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:38,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:38,936 INFO L225 Difference]: With dead ends: 194 [2019-12-18 19:34:38,936 INFO L226 Difference]: Without dead ends: 192 [2019-12-18 19:34:38,936 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2019-12-18 19:34:38,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-12-18 19:34:38,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 156. [2019-12-18 19:34:38,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 19:34:38,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 376 transitions. [2019-12-18 19:34:38,942 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 376 transitions. Word has length 13 [2019-12-18 19:34:38,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:38,943 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 376 transitions. [2019-12-18 19:34:38,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:38,943 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 376 transitions. [2019-12-18 19:34:38,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:38,944 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:38,944 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:39,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:39,148 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:39,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:39,148 INFO L82 PathProgramCache]: Analyzing trace with hash -716554982, now seen corresponding path program 55 times [2019-12-18 19:34:39,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:39,149 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105027870] [2019-12-18 19:34:39,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:39,269 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 19:34:39,270 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105027870] [2019-12-18 19:34:39,270 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519103892] [2019-12-18 19:34:39,270 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 19:34:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:39,348 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:39,351 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:39,515 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 19:34:39,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:39,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:39,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095725890] [2019-12-18 19:34:39,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:39,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:39,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:39,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:39,518 INFO L87 Difference]: Start difference. First operand 156 states and 376 transitions. Second operand 16 states. [2019-12-18 19:34:39,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:39,913 INFO L93 Difference]: Finished difference Result 218 states and 481 transitions. [2019-12-18 19:34:39,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 19:34:39,914 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:39,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:39,916 INFO L225 Difference]: With dead ends: 218 [2019-12-18 19:34:39,916 INFO L226 Difference]: Without dead ends: 217 [2019-12-18 19:34:39,916 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2019-12-18 19:34:39,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-12-18 19:34:39,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 154. [2019-12-18 19:34:39,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 19:34:39,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 367 transitions. [2019-12-18 19:34:39,920 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 367 transitions. Word has length 13 [2019-12-18 19:34:39,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:39,920 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 367 transitions. [2019-12-18 19:34:39,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:39,920 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 367 transitions. [2019-12-18 19:34:39,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:39,920 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:39,920 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:40,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:40,121 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:40,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:40,122 INFO L82 PathProgramCache]: Analyzing trace with hash -716555137, now seen corresponding path program 56 times [2019-12-18 19:34:40,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:40,122 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606304230] [2019-12-18 19:34:40,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:40,196 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 19:34:40,196 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606304230] [2019-12-18 19:34:40,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501458664] [2019-12-18 19:34:40,197 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 19:34:40,239 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:34:40,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:40,240 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:40,241 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:40,327 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 19:34:40,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:40,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:40,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005317958] [2019-12-18 19:34:40,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:40,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:40,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:40,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:40,329 INFO L87 Difference]: Start difference. First operand 154 states and 367 transitions. Second operand 16 states. [2019-12-18 19:34:40,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:40,619 INFO L93 Difference]: Finished difference Result 231 states and 505 transitions. [2019-12-18 19:34:40,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 19:34:40,620 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:40,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:40,622 INFO L225 Difference]: With dead ends: 231 [2019-12-18 19:34:40,622 INFO L226 Difference]: Without dead ends: 229 [2019-12-18 19:34:40,622 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 19:34:40,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-12-18 19:34:40,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 152. [2019-12-18 19:34:40,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 19:34:40,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 359 transitions. [2019-12-18 19:34:40,626 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 359 transitions. Word has length 13 [2019-12-18 19:34:40,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:40,626 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 359 transitions. [2019-12-18 19:34:40,626 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:40,626 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 359 transitions. [2019-12-18 19:34:40,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:40,627 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:40,627 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:40,828 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:40,828 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:40,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:40,829 INFO L82 PathProgramCache]: Analyzing trace with hash -716559787, now seen corresponding path program 57 times [2019-12-18 19:34:40,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:40,836 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897996821] [2019-12-18 19:34:40,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:40,907 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 19:34:40,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897996821] [2019-12-18 19:34:40,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025439663] [2019-12-18 19:34:40,908 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 19:34:40,949 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 19:34:40,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:40,950 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:40,951 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:41,047 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 19:34:41,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:41,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:41,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000619537] [2019-12-18 19:34:41,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:41,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:41,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:41,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:41,049 INFO L87 Difference]: Start difference. First operand 152 states and 359 transitions. Second operand 16 states. [2019-12-18 19:34:41,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:41,451 INFO L93 Difference]: Finished difference Result 225 states and 480 transitions. [2019-12-18 19:34:41,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:34:41,452 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:41,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:41,454 INFO L225 Difference]: With dead ends: 225 [2019-12-18 19:34:41,454 INFO L226 Difference]: Without dead ends: 223 [2019-12-18 19:34:41,454 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 19:34:41,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-18 19:34:41,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 145. [2019-12-18 19:34:41,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 19:34:41,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 330 transitions. [2019-12-18 19:34:41,457 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 330 transitions. Word has length 13 [2019-12-18 19:34:41,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:41,458 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 330 transitions. [2019-12-18 19:34:41,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:41,458 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 330 transitions. [2019-12-18 19:34:41,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:34:41,458 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:41,458 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:41,661 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:41,662 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:41,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:41,662 INFO L82 PathProgramCache]: Analyzing trace with hash -721177547, now seen corresponding path program 58 times [2019-12-18 19:34:41,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:41,663 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654481511] [2019-12-18 19:34:41,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:41,732 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 19:34:41,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654481511] [2019-12-18 19:34:41,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831329140] [2019-12-18 19:34:41,733 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 19:34:41,778 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:34:41,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:41,779 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:34:41,779 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:41,885 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 19:34:41,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:41,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 19:34:41,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25263488] [2019-12-18 19:34:41,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 19:34:41,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:41,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 19:34:41,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:34:41,888 INFO L87 Difference]: Start difference. First operand 145 states and 330 transitions. Second operand 16 states. [2019-12-18 19:34:42,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:42,174 INFO L93 Difference]: Finished difference Result 156 states and 335 transitions. [2019-12-18 19:34:42,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 19:34:42,174 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 19:34:42,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:42,176 INFO L225 Difference]: With dead ends: 156 [2019-12-18 19:34:42,176 INFO L226 Difference]: Without dead ends: 146 [2019-12-18 19:34:42,176 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 19:34:42,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-18 19:34:42,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 137. [2019-12-18 19:34:42,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-18 19:34:42,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 299 transitions. [2019-12-18 19:34:42,180 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 299 transitions. Word has length 13 [2019-12-18 19:34:42,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:42,180 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 299 transitions. [2019-12-18 19:34:42,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 19:34:42,180 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 299 transitions. [2019-12-18 19:34:42,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:34:42,180 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:42,180 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:42,383 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:42,384 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:42,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:42,384 INFO L82 PathProgramCache]: Analyzing trace with hash 801705142, now seen corresponding path program 59 times [2019-12-18 19:34:42,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:42,385 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515845400] [2019-12-18 19:34:42,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:42,474 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 19:34:42,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515845400] [2019-12-18 19:34:42,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700772412] [2019-12-18 19:34:42,475 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 19:34:42,517 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:34:42,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:42,518 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:34:42,519 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:42,657 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 19:34:42,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:42,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:34:42,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211127655] [2019-12-18 19:34:42,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:34:42,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:42,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:34:42,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:34:42,659 INFO L87 Difference]: Start difference. First operand 137 states and 299 transitions. Second operand 18 states. [2019-12-18 19:34:43,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:43,113 INFO L93 Difference]: Finished difference Result 174 states and 370 transitions. [2019-12-18 19:34:43,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 19:34:43,113 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:34:43,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:43,115 INFO L225 Difference]: With dead ends: 174 [2019-12-18 19:34:43,115 INFO L226 Difference]: Without dead ends: 172 [2019-12-18 19:34:43,115 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2019-12-18 19:34:43,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-18 19:34:43,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 137. [2019-12-18 19:34:43,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-18 19:34:43,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 301 transitions. [2019-12-18 19:34:43,118 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 301 transitions. Word has length 14 [2019-12-18 19:34:43,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:43,118 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 301 transitions. [2019-12-18 19:34:43,118 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:34:43,118 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 301 transitions. [2019-12-18 19:34:43,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:34:43,119 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:43,119 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:43,319 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:43,320 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:43,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:43,320 INFO L82 PathProgramCache]: Analyzing trace with hash 802747827, now seen corresponding path program 60 times [2019-12-18 19:34:43,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:43,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614967575] [2019-12-18 19:34:43,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:43,435 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 19:34:43,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614967575] [2019-12-18 19:34:43,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705141247] [2019-12-18 19:34:43,436 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 19:34:43,479 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:34:43,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:43,480 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:34:43,480 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:43,616 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 19:34:43,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:43,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:34:43,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837007893] [2019-12-18 19:34:43,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:34:43,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:43,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:34:43,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:34:43,617 INFO L87 Difference]: Start difference. First operand 137 states and 301 transitions. Second operand 18 states. [2019-12-18 19:34:44,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:44,044 INFO L93 Difference]: Finished difference Result 178 states and 381 transitions. [2019-12-18 19:34:44,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 19:34:44,044 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:34:44,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:44,046 INFO L225 Difference]: With dead ends: 178 [2019-12-18 19:34:44,046 INFO L226 Difference]: Without dead ends: 177 [2019-12-18 19:34:44,046 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 19:34:44,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-18 19:34:44,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 140. [2019-12-18 19:34:44,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 19:34:44,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 312 transitions. [2019-12-18 19:34:44,049 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 312 transitions. Word has length 14 [2019-12-18 19:34:44,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:44,050 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 312 transitions. [2019-12-18 19:34:44,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:34:44,050 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 312 transitions. [2019-12-18 19:34:44,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:34:44,050 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:44,050 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:44,250 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:44,251 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:44,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:44,252 INFO L82 PathProgramCache]: Analyzing trace with hash 802747672, now seen corresponding path program 61 times [2019-12-18 19:34:44,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:44,252 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882491859] [2019-12-18 19:34:44,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:44,333 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 19:34:44,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882491859] [2019-12-18 19:34:44,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602461093] [2019-12-18 19:34:44,334 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 19:34:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:44,376 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:34:44,377 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:44,523 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 19:34:44,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:44,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:34:44,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890008638] [2019-12-18 19:34:44,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:34:44,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:44,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:34:44,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:34:44,525 INFO L87 Difference]: Start difference. First operand 140 states and 312 transitions. Second operand 18 states. [2019-12-18 19:34:45,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:45,037 INFO L93 Difference]: Finished difference Result 200 states and 425 transitions. [2019-12-18 19:34:45,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 19:34:45,037 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:34:45,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:45,039 INFO L225 Difference]: With dead ends: 200 [2019-12-18 19:34:45,040 INFO L226 Difference]: Without dead ends: 197 [2019-12-18 19:34:45,040 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-12-18 19:34:45,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-18 19:34:45,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 140. [2019-12-18 19:34:45,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 19:34:45,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 311 transitions. [2019-12-18 19:34:45,043 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 311 transitions. Word has length 14 [2019-12-18 19:34:45,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:45,043 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 311 transitions. [2019-12-18 19:34:45,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:34:45,044 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 311 transitions. [2019-12-18 19:34:45,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:34:45,044 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:45,044 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:45,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:45,247 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:45,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:45,248 INFO L82 PathProgramCache]: Analyzing trace with hash 802743022, now seen corresponding path program 62 times [2019-12-18 19:34:45,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:45,248 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456373106] [2019-12-18 19:34:45,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:45,335 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 19:34:45,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456373106] [2019-12-18 19:34:45,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720127767] [2019-12-18 19:34:45,336 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 19:34:45,379 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:34:45,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:45,380 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:34:45,381 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:45,854 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 19:34:45,855 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 19:34:45,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:45,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:34:45,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981569535] [2019-12-18 19:34:45,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:34:45,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:45,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:34:45,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:34:45,857 INFO L87 Difference]: Start difference. First operand 140 states and 311 transitions. Second operand 18 states. [2019-12-18 19:34:46,515 WARN L192 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-18 19:34:47,040 WARN L192 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-12-18 19:34:47,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:47,701 INFO L93 Difference]: Finished difference Result 201 states and 427 transitions. [2019-12-18 19:34:47,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 19:34:47,702 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:34:47,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:47,704 INFO L225 Difference]: With dead ends: 201 [2019-12-18 19:34:47,704 INFO L226 Difference]: Without dead ends: 199 [2019-12-18 19:34:47,704 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=307, Invalid=684, Unknown=1, NotChecked=0, Total=992 [2019-12-18 19:34:47,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-18 19:34:47,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 140. [2019-12-18 19:34:47,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 19:34:47,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 311 transitions. [2019-12-18 19:34:47,708 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 311 transitions. Word has length 14 [2019-12-18 19:34:47,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:47,708 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 311 transitions. [2019-12-18 19:34:47,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:34:47,708 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 311 transitions. [2019-12-18 19:34:47,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:34:47,708 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:47,708 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:47,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:47,909 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:47,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:47,910 INFO L82 PathProgramCache]: Analyzing trace with hash 835071062, now seen corresponding path program 63 times [2019-12-18 19:34:47,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:47,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790167682] [2019-12-18 19:34:47,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:47,987 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 19:34:47,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790167682] [2019-12-18 19:34:47,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115530371] [2019-12-18 19:34:47,988 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 19:34:48,029 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 19:34:48,029 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:48,029 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:34:48,030 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:48,172 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 19:34:48,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:48,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:34:48,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631332699] [2019-12-18 19:34:48,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:34:48,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:48,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:34:48,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:34:48,174 INFO L87 Difference]: Start difference. First operand 140 states and 311 transitions. Second operand 18 states. [2019-12-18 19:34:48,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:48,654 INFO L93 Difference]: Finished difference Result 184 states and 394 transitions. [2019-12-18 19:34:48,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 19:34:48,654 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:34:48,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:48,655 INFO L225 Difference]: With dead ends: 184 [2019-12-18 19:34:48,655 INFO L226 Difference]: Without dead ends: 175 [2019-12-18 19:34:48,656 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 19:34:48,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-18 19:34:48,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 149. [2019-12-18 19:34:48,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 19:34:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 337 transitions. [2019-12-18 19:34:48,659 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 337 transitions. Word has length 14 [2019-12-18 19:34:48,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:48,659 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 337 transitions. [2019-12-18 19:34:48,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:34:48,659 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 337 transitions. [2019-12-18 19:34:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:34:48,660 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:48,660 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:48,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:48,861 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:48,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:48,861 INFO L82 PathProgramCache]: Analyzing trace with hash 835070907, now seen corresponding path program 64 times [2019-12-18 19:34:48,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:48,862 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537893628] [2019-12-18 19:34:48,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:48,949 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 19:34:48,949 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537893628] [2019-12-18 19:34:48,949 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079303252] [2019-12-18 19:34:48,950 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 19:34:48,991 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:34:48,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:48,992 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:34:48,993 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:49,948 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 19:34:49,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:49,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:34:49,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664053978] [2019-12-18 19:34:49,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:34:49,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:49,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:34:49,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=233, Unknown=1, NotChecked=0, Total=306 [2019-12-18 19:34:49,950 INFO L87 Difference]: Start difference. First operand 149 states and 337 transitions. Second operand 18 states. [2019-12-18 19:34:50,725 WARN L192 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2019-12-18 19:34:51,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:51,211 INFO L93 Difference]: Finished difference Result 226 states and 480 transitions. [2019-12-18 19:34:51,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:34:51,212 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:34:51,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:51,213 INFO L225 Difference]: With dead ends: 226 [2019-12-18 19:34:51,213 INFO L226 Difference]: Without dead ends: 224 [2019-12-18 19:34:51,213 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=353, Invalid=768, Unknown=1, NotChecked=0, Total=1122 [2019-12-18 19:34:51,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-12-18 19:34:51,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 149. [2019-12-18 19:34:51,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 19:34:51,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 337 transitions. [2019-12-18 19:34:51,217 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 337 transitions. Word has length 14 [2019-12-18 19:34:51,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:51,217 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 337 transitions. [2019-12-18 19:34:51,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:34:51,217 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 337 transitions. [2019-12-18 19:34:51,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:34:51,218 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:51,218 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:51,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:51,420 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:51,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:51,421 INFO L82 PathProgramCache]: Analyzing trace with hash 835066257, now seen corresponding path program 65 times [2019-12-18 19:34:51,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:51,421 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509825801] [2019-12-18 19:34:51,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:51,509 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 19:34:51,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509825801] [2019-12-18 19:34:51,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159382212] [2019-12-18 19:34:51,510 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 19:34:51,554 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:34:51,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:51,555 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:34:51,556 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:54,250 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 19:34:54,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:54,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:34:54,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794025988] [2019-12-18 19:34:54,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:34:54,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:54,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:34:54,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=229, Unknown=3, NotChecked=0, Total=306 [2019-12-18 19:34:54,251 INFO L87 Difference]: Start difference. First operand 149 states and 337 transitions. Second operand 18 states. [2019-12-18 19:34:55,757 WARN L192 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2019-12-18 19:34:56,210 WARN L192 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2019-12-18 19:34:57,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:34:57,115 INFO L93 Difference]: Finished difference Result 229 states and 487 transitions. [2019-12-18 19:34:57,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 19:34:57,116 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:34:57,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:34:57,117 INFO L225 Difference]: With dead ends: 229 [2019-12-18 19:34:57,117 INFO L226 Difference]: Without dead ends: 228 [2019-12-18 19:34:57,118 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=350, Invalid=768, Unknown=4, NotChecked=0, Total=1122 [2019-12-18 19:34:57,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2019-12-18 19:34:57,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 150. [2019-12-18 19:34:57,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-18 19:34:57,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 341 transitions. [2019-12-18 19:34:57,121 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 341 transitions. Word has length 14 [2019-12-18 19:34:57,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:34:57,122 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 341 transitions. [2019-12-18 19:34:57,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:34:57,122 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 341 transitions. [2019-12-18 19:34:57,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:34:57,122 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:34:57,122 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:34:57,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:34:57,323 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:34:57,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:34:57,324 INFO L82 PathProgramCache]: Analyzing trace with hash 835066102, now seen corresponding path program 66 times [2019-12-18 19:34:57,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:34:57,324 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897428318] [2019-12-18 19:34:57,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:34:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:34:57,464 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 19:34:57,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897428318] [2019-12-18 19:34:57,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309739087] [2019-12-18 19:34:57,465 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 19:34:57,534 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 19:34:57,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:34:57,536 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:34:57,537 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:34:58,359 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 19:34:58,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:34:58,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:34:58,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821640725] [2019-12-18 19:34:58,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:34:58,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:34:58,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:34:58,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:34:58,361 INFO L87 Difference]: Start difference. First operand 150 states and 341 transitions. Second operand 18 states. [2019-12-18 19:35:01,097 WARN L192 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-18 19:35:03,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:35:03,077 INFO L93 Difference]: Finished difference Result 220 states and 470 transitions. [2019-12-18 19:35:03,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:35:03,077 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:35:03,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:35:03,079 INFO L225 Difference]: With dead ends: 220 [2019-12-18 19:35:03,079 INFO L226 Difference]: Without dead ends: 216 [2019-12-18 19:35:03,080 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=378, Invalid=810, Unknown=2, NotChecked=0, Total=1190 [2019-12-18 19:35:03,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-12-18 19:35:03,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 149. [2019-12-18 19:35:03,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 19:35:03,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-18 19:35:03,082 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-18 19:35:03,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:35:03,082 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-18 19:35:03,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:35:03,083 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-18 19:35:03,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:35:03,083 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:35:03,083 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:35:03,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:03,286 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:35:03,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:35:03,286 INFO L82 PathProgramCache]: Analyzing trace with hash 834922107, now seen corresponding path program 67 times [2019-12-18 19:35:03,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:35:03,287 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627182007] [2019-12-18 19:35:03,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:35:03,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:35:03,372 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 19:35:03,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627182007] [2019-12-18 19:35:03,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736693230] [2019-12-18 19:35:03,373 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 19:35:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:35:03,416 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:35:03,417 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:35:06,677 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 19:35:06,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:35:06,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:35:06,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904812107] [2019-12-18 19:35:06,678 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:35:06,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:35:06,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:35:06,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=230, Unknown=3, NotChecked=0, Total=306 [2019-12-18 19:35:06,679 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 18 states. [2019-12-18 19:35:07,145 WARN L192 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-18 19:35:08,449 WARN L192 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2019-12-18 19:35:10,442 WARN L192 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-18 19:35:10,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:35:10,497 INFO L93 Difference]: Finished difference Result 223 states and 479 transitions. [2019-12-18 19:35:10,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 19:35:10,498 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:35:10,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:35:10,500 INFO L225 Difference]: With dead ends: 223 [2019-12-18 19:35:10,500 INFO L226 Difference]: Without dead ends: 222 [2019-12-18 19:35:10,500 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=282, Invalid=707, Unknown=3, NotChecked=0, Total=992 [2019-12-18 19:35:10,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-18 19:35:10,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 151. [2019-12-18 19:35:10,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-18 19:35:10,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 343 transitions. [2019-12-18 19:35:10,504 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 343 transitions. Word has length 14 [2019-12-18 19:35:10,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:35:10,504 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 343 transitions. [2019-12-18 19:35:10,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:35:10,504 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 343 transitions. [2019-12-18 19:35:10,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:35:10,505 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:35:10,505 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:35:10,705 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:10,705 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:35:10,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:35:10,706 INFO L82 PathProgramCache]: Analyzing trace with hash 834921952, now seen corresponding path program 68 times [2019-12-18 19:35:10,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:35:10,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262939235] [2019-12-18 19:35:10,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:35:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:35:10,826 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 19:35:10,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262939235] [2019-12-18 19:35:10,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372983741] [2019-12-18 19:35:10,827 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 19:35:10,870 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:35:10,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:35:10,871 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:35:10,872 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:35:15,260 WARN L192 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-18 19:35:15,261 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 19:35:15,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:35:15,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:35:15,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980583206] [2019-12-18 19:35:15,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:35:15,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:35:15,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:35:15,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=227, Unknown=2, NotChecked=0, Total=306 [2019-12-18 19:35:15,262 INFO L87 Difference]: Start difference. First operand 151 states and 343 transitions. Second operand 18 states. [2019-12-18 19:35:15,646 WARN L192 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2019-12-18 19:35:16,344 WARN L192 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2019-12-18 19:35:19,105 WARN L192 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-18 19:35:19,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:35:19,154 INFO L93 Difference]: Finished difference Result 219 states and 471 transitions. [2019-12-18 19:35:19,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 19:35:19,154 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:35:19,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:35:19,156 INFO L225 Difference]: With dead ends: 219 [2019-12-18 19:35:19,156 INFO L226 Difference]: Without dead ends: 216 [2019-12-18 19:35:19,156 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=265, Invalid=603, Unknown=2, NotChecked=0, Total=870 [2019-12-18 19:35:19,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-12-18 19:35:19,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 150. [2019-12-18 19:35:19,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-18 19:35:19,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 339 transitions. [2019-12-18 19:35:19,161 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 339 transitions. Word has length 14 [2019-12-18 19:35:19,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:35:19,161 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 339 transitions. [2019-12-18 19:35:19,161 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:35:19,161 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 339 transitions. [2019-12-18 19:35:19,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:35:19,162 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:35:19,162 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:35:19,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:19,363 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:35:19,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:35:19,363 INFO L82 PathProgramCache]: Analyzing trace with hash 834917302, now seen corresponding path program 69 times [2019-12-18 19:35:19,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:35:19,364 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600931311] [2019-12-18 19:35:19,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:35:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:35:19,459 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 19:35:19,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600931311] [2019-12-18 19:35:19,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239765812] [2019-12-18 19:35:19,460 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 19:35:19,500 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 19:35:19,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:35:19,501 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:35:19,501 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:35:19,985 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_244 Int)) (and (<= c_~i~0 (+ v_~j~0_244 1)) (<= (div (+ (* v_~j~0_244 (- 1)) 1) (- 3)) 1) (<= c_~j~0 (+ c_~i~0 v_~j~0_244)))) is different from true [2019-12-18 19:35:21,191 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 19:35:21,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:35:21,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:35:21,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487842454] [2019-12-18 19:35:21,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:35:21,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:35:21,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:35:21,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=205, Unknown=2, NotChecked=30, Total=306 [2019-12-18 19:35:21,193 INFO L87 Difference]: Start difference. First operand 150 states and 339 transitions. Second operand 18 states. [2019-12-18 19:35:22,253 WARN L192 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2019-12-18 19:35:27,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:35:27,780 INFO L93 Difference]: Finished difference Result 208 states and 450 transitions. [2019-12-18 19:35:27,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 19:35:27,781 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:35:27,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:35:27,782 INFO L225 Difference]: With dead ends: 208 [2019-12-18 19:35:27,782 INFO L226 Difference]: Without dead ends: 206 [2019-12-18 19:35:27,783 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=296, Invalid=695, Unknown=5, NotChecked=60, Total=1056 [2019-12-18 19:35:27,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-18 19:35:27,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 149. [2019-12-18 19:35:27,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 19:35:27,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-18 19:35:27,787 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-18 19:35:27,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:35:27,787 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-18 19:35:27,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:35:27,787 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-18 19:35:27,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:35:27,788 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:35:27,788 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:35:27,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:27,991 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:35:27,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:35:27,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086542, now seen corresponding path program 70 times [2019-12-18 19:35:27,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:35:27,992 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446454000] [2019-12-18 19:35:27,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:35:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:35:28,076 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 19:35:28,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446454000] [2019-12-18 19:35:28,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032096212] [2019-12-18 19:35:28,077 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 19:35:28,121 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:35:28,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:35:28,122 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:35:28,122 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:35:28,381 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 19:35:28,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:35:28,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:35:28,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873555181] [2019-12-18 19:35:28,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:35:28,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:35:28,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:35:28,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:35:28,383 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 18 states. [2019-12-18 19:35:29,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:35:29,084 INFO L93 Difference]: Finished difference Result 245 states and 526 transitions. [2019-12-18 19:35:29,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 19:35:29,084 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:35:29,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:35:29,086 INFO L225 Difference]: With dead ends: 245 [2019-12-18 19:35:29,086 INFO L226 Difference]: Without dead ends: 241 [2019-12-18 19:35:29,087 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 19:35:29,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-12-18 19:35:29,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 155. [2019-12-18 19:35:29,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-18 19:35:29,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 354 transitions. [2019-12-18 19:35:29,091 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 354 transitions. Word has length 14 [2019-12-18 19:35:29,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:35:29,091 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 354 transitions. [2019-12-18 19:35:29,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:35:29,092 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 354 transitions. [2019-12-18 19:35:29,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:35:29,092 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:35:29,092 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:35:29,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:29,293 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:35:29,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:35:29,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086387, now seen corresponding path program 71 times [2019-12-18 19:35:29,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:35:29,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423548126] [2019-12-18 19:35:29,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:35:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:35:29,396 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 19:35:29,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423548126] [2019-12-18 19:35:29,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947259202] [2019-12-18 19:35:29,397 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 19:35:29,437 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 19:35:29,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:35:29,438 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:35:29,439 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:35:29,613 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 19:35:29,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:35:29,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:35:29,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047611837] [2019-12-18 19:35:29,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:35:29,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:35:29,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:35:29,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:35:29,615 INFO L87 Difference]: Start difference. First operand 155 states and 354 transitions. Second operand 18 states. [2019-12-18 19:35:30,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:35:30,262 INFO L93 Difference]: Finished difference Result 237 states and 509 transitions. [2019-12-18 19:35:30,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 19:35:30,263 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:35:30,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:35:30,265 INFO L225 Difference]: With dead ends: 237 [2019-12-18 19:35:30,265 INFO L226 Difference]: Without dead ends: 235 [2019-12-18 19:35:30,265 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 19:35:30,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-18 19:35:30,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 153. [2019-12-18 19:35:30,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-18 19:35:30,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 347 transitions. [2019-12-18 19:35:30,269 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 347 transitions. Word has length 14 [2019-12-18 19:35:30,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:35:30,270 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 347 transitions. [2019-12-18 19:35:30,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:35:30,270 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 347 transitions. [2019-12-18 19:35:30,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:35:30,270 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:35:30,270 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:35:30,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:30,474 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:35:30,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:35:30,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942392, now seen corresponding path program 72 times [2019-12-18 19:35:30,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:35:30,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391568172] [2019-12-18 19:35:30,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:35:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:35:30,571 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 19:35:30,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391568172] [2019-12-18 19:35:30,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051075451] [2019-12-18 19:35:30,572 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 19:35:30,617 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:35:30,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:35:30,618 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:35:30,619 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:35:30,818 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 19:35:30,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:35:30,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:35:30,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771362464] [2019-12-18 19:35:30,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:35:30,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:35:30,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:35:30,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:35:30,820 INFO L87 Difference]: Start difference. First operand 153 states and 347 transitions. Second operand 18 states. [2019-12-18 19:35:31,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:35:31,472 INFO L93 Difference]: Finished difference Result 245 states and 527 transitions. [2019-12-18 19:35:31,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:35:31,472 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:35:31,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:35:31,474 INFO L225 Difference]: With dead ends: 245 [2019-12-18 19:35:31,474 INFO L226 Difference]: Without dead ends: 240 [2019-12-18 19:35:31,475 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2019-12-18 19:35:31,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-12-18 19:35:31,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 157. [2019-12-18 19:35:31,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-18 19:35:31,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 361 transitions. [2019-12-18 19:35:31,479 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 361 transitions. Word has length 14 [2019-12-18 19:35:31,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:35:31,479 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 361 transitions. [2019-12-18 19:35:31,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:35:31,480 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 361 transitions. [2019-12-18 19:35:31,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:35:31,480 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:35:31,480 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:35:31,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:31,681 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:35:31,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:35:31,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942237, now seen corresponding path program 73 times [2019-12-18 19:35:31,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:35:31,682 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094899273] [2019-12-18 19:35:31,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:35:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:35:31,776 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 19:35:31,776 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094899273] [2019-12-18 19:35:31,776 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880143800] [2019-12-18 19:35:31,777 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 19:35:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:35:31,821 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:35:31,821 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:35:32,074 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 19:35:32,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:35:32,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:35:32,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537716116] [2019-12-18 19:35:32,075 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:35:32,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:35:32,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:35:32,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:35:32,076 INFO L87 Difference]: Start difference. First operand 157 states and 361 transitions. Second operand 18 states. [2019-12-18 19:35:32,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:35:32,750 INFO L93 Difference]: Finished difference Result 267 states and 576 transitions. [2019-12-18 19:35:32,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:35:32,750 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:35:32,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:35:32,753 INFO L225 Difference]: With dead ends: 267 [2019-12-18 19:35:32,753 INFO L226 Difference]: Without dead ends: 260 [2019-12-18 19:35:32,753 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2019-12-18 19:35:32,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-12-18 19:35:32,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 158. [2019-12-18 19:35:32,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-18 19:35:32,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 361 transitions. [2019-12-18 19:35:32,756 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 361 transitions. Word has length 14 [2019-12-18 19:35:32,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:35:32,757 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 361 transitions. [2019-12-18 19:35:32,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:35:32,757 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 361 transitions. [2019-12-18 19:35:32,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:35:32,757 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:35:32,758 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:35:32,958 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:32,958 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:35:32,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:35:32,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1836937587, now seen corresponding path program 74 times [2019-12-18 19:35:32,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:35:32,960 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938715099] [2019-12-18 19:35:32,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:35:32,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:35:33,047 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 19:35:33,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938715099] [2019-12-18 19:35:33,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642608819] [2019-12-18 19:35:33,048 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 19:35:33,089 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:35:33,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:35:33,090 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:35:33,091 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:35:45,468 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 19:35:45,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:35:45,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:35:45,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160831751] [2019-12-18 19:35:45,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:35:45,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:35:45,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:35:45,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=229, Unknown=3, NotChecked=0, Total=306 [2019-12-18 19:35:45,470 INFO L87 Difference]: Start difference. First operand 158 states and 361 transitions. Second operand 18 states. [2019-12-18 19:35:47,761 WARN L192 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-18 19:35:51,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:35:51,413 INFO L93 Difference]: Finished difference Result 269 states and 580 transitions. [2019-12-18 19:35:51,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-18 19:35:51,413 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:35:51,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:35:51,415 INFO L225 Difference]: With dead ends: 269 [2019-12-18 19:35:51,415 INFO L226 Difference]: Without dead ends: 266 [2019-12-18 19:35:51,416 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=331, Invalid=788, Unknown=3, NotChecked=0, Total=1122 [2019-12-18 19:35:51,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-12-18 19:35:51,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 161. [2019-12-18 19:35:51,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-18 19:35:51,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 374 transitions. [2019-12-18 19:35:51,420 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 374 transitions. Word has length 14 [2019-12-18 19:35:51,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:35:51,420 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 374 transitions. [2019-12-18 19:35:51,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:35:51,420 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 374 transitions. [2019-12-18 19:35:51,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:35:51,421 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:35:51,421 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:35:51,621 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:51,622 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:35:51,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:35:51,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473742, now seen corresponding path program 75 times [2019-12-18 19:35:51,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:35:51,623 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090753723] [2019-12-18 19:35:51,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:35:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:35:51,710 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 19:35:51,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090753723] [2019-12-18 19:35:51,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607005447] [2019-12-18 19:35:51,711 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 19:35:51,754 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 19:35:51,754 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:35:51,755 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:35:51,756 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:35:51,973 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 19:35:51,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:35:51,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:35:51,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444377872] [2019-12-18 19:35:51,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:35:51,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:35:51,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:35:51,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:35:51,974 INFO L87 Difference]: Start difference. First operand 161 states and 374 transitions. Second operand 18 states. [2019-12-18 19:35:52,669 WARN L192 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2019-12-18 19:35:53,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:35:53,795 INFO L93 Difference]: Finished difference Result 225 states and 497 transitions. [2019-12-18 19:35:53,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-18 19:35:53,795 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:35:53,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:35:53,797 INFO L225 Difference]: With dead ends: 225 [2019-12-18 19:35:53,797 INFO L226 Difference]: Without dead ends: 224 [2019-12-18 19:35:53,798 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=415, Invalid=1067, Unknown=0, NotChecked=0, Total=1482 [2019-12-18 19:35:53,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-12-18 19:35:53,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 162. [2019-12-18 19:35:53,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-18 19:35:53,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 378 transitions. [2019-12-18 19:35:53,801 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 378 transitions. Word has length 14 [2019-12-18 19:35:53,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:35:53,802 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 378 transitions. [2019-12-18 19:35:53,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:35:53,802 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 378 transitions. [2019-12-18 19:35:53,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:35:53,802 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:35:53,802 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:35:54,002 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:35:54,003 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:35:54,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:35:54,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473587, now seen corresponding path program 76 times [2019-12-18 19:35:54,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:35:54,004 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611888371] [2019-12-18 19:35:54,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:35:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:35:54,094 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 19:35:54,094 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611888371] [2019-12-18 19:35:54,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590382467] [2019-12-18 19:35:54,095 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 19:35:54,138 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:35:54,138 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:35:54,139 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:35:54,139 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:35:54,433 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 19:35:54,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:35:54,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:35:54,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638578193] [2019-12-18 19:35:54,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:35:54,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:35:54,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:35:54,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:35:54,434 INFO L87 Difference]: Start difference. First operand 162 states and 378 transitions. Second operand 18 states. [2019-12-18 19:36:04,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:36:04,095 INFO L93 Difference]: Finished difference Result 248 states and 554 transitions. [2019-12-18 19:36:04,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 19:36:04,095 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:36:04,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:36:04,097 INFO L225 Difference]: With dead ends: 248 [2019-12-18 19:36:04,097 INFO L226 Difference]: Without dead ends: 247 [2019-12-18 19:36:04,098 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=271, Invalid=659, Unknown=0, NotChecked=0, Total=930 [2019-12-18 19:36:04,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-12-18 19:36:04,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 162. [2019-12-18 19:36:04,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-18 19:36:04,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 378 transitions. [2019-12-18 19:36:04,101 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 378 transitions. Word has length 14 [2019-12-18 19:36:04,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:36:04,101 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 378 transitions. [2019-12-18 19:36:04,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:36:04,101 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 378 transitions. [2019-12-18 19:36:04,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:36:04,101 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:36:04,101 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:36:04,302 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:04,302 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:36:04,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:36:04,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468937, now seen corresponding path program 77 times [2019-12-18 19:36:04,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:36:04,303 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125408155] [2019-12-18 19:36:04,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:36:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:04,401 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 19:36:04,402 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125408155] [2019-12-18 19:36:04,402 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731250566] [2019-12-18 19:36:04,402 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 19:36:04,445 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:36:04,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:36:04,447 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:36:04,447 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:36:04,753 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 19:36:04,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:36:04,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:36:04,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652421204] [2019-12-18 19:36:04,754 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:36:04,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:36:04,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:36:04,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:36:04,754 INFO L87 Difference]: Start difference. First operand 162 states and 378 transitions. Second operand 18 states. [2019-12-18 19:36:05,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:36:05,363 INFO L93 Difference]: Finished difference Result 249 states and 559 transitions. [2019-12-18 19:36:05,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:36:05,363 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:36:05,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:36:05,365 INFO L225 Difference]: With dead ends: 249 [2019-12-18 19:36:05,366 INFO L226 Difference]: Without dead ends: 248 [2019-12-18 19:36:05,366 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2019-12-18 19:36:05,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2019-12-18 19:36:05,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 162. [2019-12-18 19:36:05,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-18 19:36:05,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 378 transitions. [2019-12-18 19:36:05,370 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 378 transitions. Word has length 14 [2019-12-18 19:36:05,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:36:05,370 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 378 transitions. [2019-12-18 19:36:05,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:36:05,370 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 378 transitions. [2019-12-18 19:36:05,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:36:05,370 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:36:05,371 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:36:05,571 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:05,571 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:36:05,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:36:05,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468782, now seen corresponding path program 78 times [2019-12-18 19:36:05,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:36:05,572 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333490932] [2019-12-18 19:36:05,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:36:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:05,666 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 19:36:05,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333490932] [2019-12-18 19:36:05,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105473349] [2019-12-18 19:36:05,667 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 19:36:05,713 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 19:36:05,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:36:05,714 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:36:05,715 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:36:05,996 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 19:36:05,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:36:05,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:36:05,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033755494] [2019-12-18 19:36:05,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:36:05,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:36:05,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:36:05,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:36:05,998 INFO L87 Difference]: Start difference. First operand 162 states and 378 transitions. Second operand 18 states. [2019-12-18 19:36:07,373 WARN L192 SmtUtils]: Spent 872.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-12-18 19:36:07,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:36:07,666 INFO L93 Difference]: Finished difference Result 242 states and 528 transitions. [2019-12-18 19:36:07,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-18 19:36:07,666 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:36:07,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:36:07,668 INFO L225 Difference]: With dead ends: 242 [2019-12-18 19:36:07,668 INFO L226 Difference]: Without dead ends: 238 [2019-12-18 19:36:07,669 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=314, Invalid=742, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 19:36:07,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-12-18 19:36:07,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 161. [2019-12-18 19:36:07,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-18 19:36:07,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 374 transitions. [2019-12-18 19:36:07,672 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 374 transitions. Word has length 14 [2019-12-18 19:36:07,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:36:07,672 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 374 transitions. [2019-12-18 19:36:07,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:36:07,673 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 374 transitions. [2019-12-18 19:36:07,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:36:07,673 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:36:07,673 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:36:07,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:07,875 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:36:07,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:36:07,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1832324787, now seen corresponding path program 79 times [2019-12-18 19:36:07,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:36:07,876 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597776309] [2019-12-18 19:36:07,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:36:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:07,970 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 19:36:07,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597776309] [2019-12-18 19:36:07,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050067481] [2019-12-18 19:36:07,971 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 19:36:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:08,014 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:36:08,015 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:36:14,280 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 19:36:14,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:36:14,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:36:14,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001471632] [2019-12-18 19:36:14,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:36:14,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:36:14,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:36:14,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:36:14,281 INFO L87 Difference]: Start difference. First operand 161 states and 374 transitions. Second operand 18 states. [2019-12-18 19:36:17,286 WARN L192 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-18 19:36:19,506 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-18 19:36:19,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:36:19,587 INFO L93 Difference]: Finished difference Result 236 states and 519 transitions. [2019-12-18 19:36:19,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 19:36:19,587 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:36:19,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:36:19,589 INFO L225 Difference]: With dead ends: 236 [2019-12-18 19:36:19,589 INFO L226 Difference]: Without dead ends: 235 [2019-12-18 19:36:19,590 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=275, Invalid=717, Unknown=0, NotChecked=0, Total=992 [2019-12-18 19:36:19,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-18 19:36:19,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 158. [2019-12-18 19:36:19,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-18 19:36:19,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 365 transitions. [2019-12-18 19:36:19,594 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 365 transitions. Word has length 14 [2019-12-18 19:36:19,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:36:19,594 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 365 transitions. [2019-12-18 19:36:19,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:36:19,594 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 365 transitions. [2019-12-18 19:36:19,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:36:19,595 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:36:19,595 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:36:19,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:19,796 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:36:19,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:36:19,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1460018341, now seen corresponding path program 80 times [2019-12-18 19:36:19,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:36:19,797 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960244208] [2019-12-18 19:36:19,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:36:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:19,906 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 19:36:19,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960244208] [2019-12-18 19:36:19,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986890139] [2019-12-18 19:36:19,907 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 19:36:19,948 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:36:19,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:36:19,949 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:36:19,949 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:36:20,085 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 19:36:20,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:36:20,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:36:20,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176644350] [2019-12-18 19:36:20,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:36:20,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:36:20,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:36:20,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:36:20,087 INFO L87 Difference]: Start difference. First operand 158 states and 365 transitions. Second operand 18 states. [2019-12-18 19:36:20,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:36:20,754 INFO L93 Difference]: Finished difference Result 199 states and 441 transitions. [2019-12-18 19:36:20,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 19:36:20,755 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:36:20,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:36:20,756 INFO L225 Difference]: With dead ends: 199 [2019-12-18 19:36:20,757 INFO L226 Difference]: Without dead ends: 197 [2019-12-18 19:36:20,758 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 19:36:20,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-18 19:36:20,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 159. [2019-12-18 19:36:20,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-18 19:36:20,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 367 transitions. [2019-12-18 19:36:20,762 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 367 transitions. Word has length 14 [2019-12-18 19:36:20,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:36:20,762 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 367 transitions. [2019-12-18 19:36:20,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:36:20,762 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 367 transitions. [2019-12-18 19:36:20,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:36:20,763 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:36:20,763 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:36:20,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:20,967 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:36:20,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:36:20,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1460172101, now seen corresponding path program 81 times [2019-12-18 19:36:20,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:36:20,968 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544540308] [2019-12-18 19:36:20,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:36:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:21,064 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 19:36:21,064 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544540308] [2019-12-18 19:36:21,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771744535] [2019-12-18 19:36:21,065 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 19:36:21,107 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 19:36:21,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:36:21,108 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:36:21,109 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:36:21,266 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 19:36:21,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:36:21,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:36:21,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779073258] [2019-12-18 19:36:21,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:36:21,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:36:21,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:36:21,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:36:21,268 INFO L87 Difference]: Start difference. First operand 159 states and 367 transitions. Second operand 18 states. [2019-12-18 19:36:21,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:36:21,921 INFO L93 Difference]: Finished difference Result 229 states and 495 transitions. [2019-12-18 19:36:21,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:36:21,921 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:36:21,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:36:21,923 INFO L225 Difference]: With dead ends: 229 [2019-12-18 19:36:21,923 INFO L226 Difference]: Without dead ends: 222 [2019-12-18 19:36:21,924 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=386, Invalid=804, Unknown=0, NotChecked=0, Total=1190 [2019-12-18 19:36:21,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-18 19:36:21,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 157. [2019-12-18 19:36:21,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-18 19:36:21,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 367 transitions. [2019-12-18 19:36:21,927 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 367 transitions. Word has length 14 [2019-12-18 19:36:21,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:36:21,928 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 367 transitions. [2019-12-18 19:36:21,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:36:21,928 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 367 transitions. [2019-12-18 19:36:21,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:36:21,928 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:36:21,928 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:36:22,128 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:22,129 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:36:22,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:36:22,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635791, now seen corresponding path program 82 times [2019-12-18 19:36:22,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:36:22,130 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319303760] [2019-12-18 19:36:22,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:36:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:22,231 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 19:36:22,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319303760] [2019-12-18 19:36:22,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164688626] [2019-12-18 19:36:22,231 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 19:36:22,276 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:36:22,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:36:22,277 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:36:22,277 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:36:23,604 WARN L192 SmtUtils]: Spent 562.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-12-18 19:36:23,605 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 19:36:23,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:36:23,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:36:23,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780998680] [2019-12-18 19:36:23,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:36:23,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:36:23,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:36:23,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=232, Unknown=1, NotChecked=0, Total=306 [2019-12-18 19:36:23,606 INFO L87 Difference]: Start difference. First operand 157 states and 367 transitions. Second operand 18 states. [2019-12-18 19:36:24,381 WARN L192 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2019-12-18 19:36:25,226 WARN L192 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2019-12-18 19:36:25,910 WARN L192 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2019-12-18 19:36:26,962 WARN L192 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-12-18 19:36:27,781 WARN L192 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 19:36:28,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:36:28,145 INFO L93 Difference]: Finished difference Result 226 states and 494 transitions. [2019-12-18 19:36:28,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-18 19:36:28,145 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:36:28,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:36:28,147 INFO L225 Difference]: With dead ends: 226 [2019-12-18 19:36:28,147 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 19:36:28,148 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=418, Invalid=1062, Unknown=2, NotChecked=0, Total=1482 [2019-12-18 19:36:28,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 19:36:28,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 159. [2019-12-18 19:36:28,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-18 19:36:28,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 372 transitions. [2019-12-18 19:36:28,151 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 372 transitions. Word has length 14 [2019-12-18 19:36:28,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:36:28,152 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 372 transitions. [2019-12-18 19:36:28,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:36:28,152 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 372 transitions. [2019-12-18 19:36:28,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:36:28,152 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:36:28,152 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:36:28,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:28,353 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:36:28,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:36:28,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635946, now seen corresponding path program 83 times [2019-12-18 19:36:28,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:36:28,354 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039623466] [2019-12-18 19:36:28,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:36:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:28,453 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 19:36:28,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039623466] [2019-12-18 19:36:28,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323475811] [2019-12-18 19:36:28,453 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 19:36:28,497 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 19:36:28,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:36:28,498 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:36:28,499 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:36:29,011 WARN L192 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-18 19:36:36,599 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 19:36:36,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:36:36,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:36:36,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327372298] [2019-12-18 19:36:36,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:36:36,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:36:36,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:36:36,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:36:36,600 INFO L87 Difference]: Start difference. First operand 159 states and 372 transitions. Second operand 18 states. [2019-12-18 19:36:39,853 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-18 19:36:40,367 WARN L192 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-12-18 19:36:43,202 WARN L192 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2019-12-18 19:36:43,943 WARN L192 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2019-12-18 19:36:44,493 WARN L192 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2019-12-18 19:36:46,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:36:46,470 INFO L93 Difference]: Finished difference Result 249 states and 544 transitions. [2019-12-18 19:36:46,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 19:36:46,471 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:36:46,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:36:46,473 INFO L225 Difference]: With dead ends: 249 [2019-12-18 19:36:46,473 INFO L226 Difference]: Without dead ends: 246 [2019-12-18 19:36:46,473 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2019-12-18 19:36:46,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2019-12-18 19:36:46,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 159. [2019-12-18 19:36:46,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-18 19:36:46,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 372 transitions. [2019-12-18 19:36:46,476 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 372 transitions. Word has length 14 [2019-12-18 19:36:46,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:36:46,476 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 372 transitions. [2019-12-18 19:36:46,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:36:46,477 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 372 transitions. [2019-12-18 19:36:46,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:36:46,477 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:36:46,477 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:36:46,677 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:46,678 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:36:46,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:36:46,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640596, now seen corresponding path program 84 times [2019-12-18 19:36:46,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:36:46,679 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045259327] [2019-12-18 19:36:46,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:36:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:46,780 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 19:36:46,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045259327] [2019-12-18 19:36:46,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297840857] [2019-12-18 19:36:46,781 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 19:36:46,827 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:36:46,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:36:46,828 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:36:46,829 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:36:47,785 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 19:36:47,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:36:47,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:36:47,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854889152] [2019-12-18 19:36:47,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:36:47,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:36:47,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:36:47,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:36:47,786 INFO L87 Difference]: Start difference. First operand 159 states and 372 transitions. Second operand 18 states. [2019-12-18 19:36:52,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:36:52,515 INFO L93 Difference]: Finished difference Result 280 states and 613 transitions. [2019-12-18 19:36:52,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 19:36:52,515 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:36:52,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:36:52,518 INFO L225 Difference]: With dead ends: 280 [2019-12-18 19:36:52,518 INFO L226 Difference]: Without dead ends: 276 [2019-12-18 19:36:52,518 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=293, Invalid=698, Unknown=1, NotChecked=0, Total=992 [2019-12-18 19:36:52,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2019-12-18 19:36:52,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 170. [2019-12-18 19:36:52,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-12-18 19:36:52,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 410 transitions. [2019-12-18 19:36:52,523 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 410 transitions. Word has length 14 [2019-12-18 19:36:52,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:36:52,523 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 410 transitions. [2019-12-18 19:36:52,523 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:36:52,523 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 410 transitions. [2019-12-18 19:36:52,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:36:52,524 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:36:52,524 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:36:52,727 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:52,728 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:36:52,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:36:52,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640751, now seen corresponding path program 85 times [2019-12-18 19:36:52,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:36:52,729 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870374969] [2019-12-18 19:36:52,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:36:52,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:52,826 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 19:36:52,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870374969] [2019-12-18 19:36:52,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621039644] [2019-12-18 19:36:52,827 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 19:36:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:52,872 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:36:52,873 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:36:54,471 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 19:36:54,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:36:54,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:36:54,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272736502] [2019-12-18 19:36:54,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:36:54,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:36:54,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:36:54,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:36:54,472 INFO L87 Difference]: Start difference. First operand 170 states and 410 transitions. Second operand 18 states. [2019-12-18 19:36:57,622 WARN L192 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2019-12-18 19:36:57,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:36:57,793 INFO L93 Difference]: Finished difference Result 280 states and 611 transitions. [2019-12-18 19:36:57,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 19:36:57,794 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:36:57,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:36:57,796 INFO L225 Difference]: With dead ends: 280 [2019-12-18 19:36:57,796 INFO L226 Difference]: Without dead ends: 275 [2019-12-18 19:36:57,797 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=319, Invalid=802, Unknown=1, NotChecked=0, Total=1122 [2019-12-18 19:36:57,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2019-12-18 19:36:57,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 168. [2019-12-18 19:36:57,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-12-18 19:36:57,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 404 transitions. [2019-12-18 19:36:57,801 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 404 transitions. Word has length 14 [2019-12-18 19:36:57,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:36:57,801 INFO L462 AbstractCegarLoop]: Abstraction has 168 states and 404 transitions. [2019-12-18 19:36:57,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:36:57,801 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 404 transitions. [2019-12-18 19:36:57,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:36:57,802 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:36:57,802 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:36:58,003 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:36:58,003 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:36:58,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:36:58,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784746, now seen corresponding path program 86 times [2019-12-18 19:36:58,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:36:58,004 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257762107] [2019-12-18 19:36:58,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:36:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:36:58,104 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 19:36:58,105 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257762107] [2019-12-18 19:36:58,105 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144347952] [2019-12-18 19:36:58,105 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 19:36:58,149 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:36:58,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:36:58,150 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:36:58,151 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:36:58,481 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 19:36:58,526 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 19:36:58,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:36:58,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:36:58,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565607280] [2019-12-18 19:36:58,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:36:58,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:36:58,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:36:58,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:36:58,527 INFO L87 Difference]: Start difference. First operand 168 states and 404 transitions. Second operand 18 states. [2019-12-18 19:36:59,189 WARN L192 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 24 [2019-12-18 19:37:00,371 WARN L192 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-18 19:37:01,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:01,488 INFO L93 Difference]: Finished difference Result 270 states and 594 transitions. [2019-12-18 19:37:01,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 19:37:01,488 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:01,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:01,490 INFO L225 Difference]: With dead ends: 270 [2019-12-18 19:37:01,491 INFO L226 Difference]: Without dead ends: 262 [2019-12-18 19:37:01,491 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=369, Invalid=891, Unknown=0, NotChecked=0, Total=1260 [2019-12-18 19:37:01,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2019-12-18 19:37:01,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 171. [2019-12-18 19:37:01,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-12-18 19:37:01,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 412 transitions. [2019-12-18 19:37:01,497 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 412 transitions. Word has length 14 [2019-12-18 19:37:01,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:01,497 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 412 transitions. [2019-12-18 19:37:01,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:01,497 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 412 transitions. [2019-12-18 19:37:01,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:01,498 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:01,498 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:01,702 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:01,702 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:01,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:01,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784901, now seen corresponding path program 87 times [2019-12-18 19:37:01,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:01,702 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621951692] [2019-12-18 19:37:01,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:01,804 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 19:37:01,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621951692] [2019-12-18 19:37:01,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916668167] [2019-12-18 19:37:01,804 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 19:37:01,848 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 19:37:01,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:01,849 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:01,850 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:02,087 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 19:37:02,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:02,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:02,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904293410] [2019-12-18 19:37:02,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:02,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:02,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:02,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:02,089 INFO L87 Difference]: Start difference. First operand 171 states and 412 transitions. Second operand 18 states. [2019-12-18 19:37:03,200 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2019-12-18 19:37:04,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:04,852 INFO L93 Difference]: Finished difference Result 276 states and 610 transitions. [2019-12-18 19:37:04,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 19:37:04,852 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:04,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:04,854 INFO L225 Difference]: With dead ends: 276 [2019-12-18 19:37:04,855 INFO L226 Difference]: Without dead ends: 272 [2019-12-18 19:37:04,855 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=410, Invalid=922, Unknown=0, NotChecked=0, Total=1332 [2019-12-18 19:37:04,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2019-12-18 19:37:04,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 169. [2019-12-18 19:37:04,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-12-18 19:37:04,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 406 transitions. [2019-12-18 19:37:04,859 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 406 transitions. Word has length 14 [2019-12-18 19:37:04,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:04,860 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 406 transitions. [2019-12-18 19:37:04,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:04,860 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 406 transitions. [2019-12-18 19:37:04,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:04,860 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:04,860 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:05,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:05,061 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:05,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:05,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1603163941, now seen corresponding path program 88 times [2019-12-18 19:37:05,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:05,062 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921050300] [2019-12-18 19:37:05,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:05,187 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 19:37:05,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921050300] [2019-12-18 19:37:05,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519229286] [2019-12-18 19:37:05,187 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 19:37:05,230 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:37:05,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:05,231 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:05,232 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:05,359 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 19:37:05,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:05,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:05,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799441328] [2019-12-18 19:37:05,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:05,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:05,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:05,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:05,361 INFO L87 Difference]: Start difference. First operand 169 states and 406 transitions. Second operand 18 states. [2019-12-18 19:37:06,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:06,030 INFO L93 Difference]: Finished difference Result 231 states and 505 transitions. [2019-12-18 19:37:06,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-18 19:37:06,031 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:06,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:06,033 INFO L225 Difference]: With dead ends: 231 [2019-12-18 19:37:06,033 INFO L226 Difference]: Without dead ends: 219 [2019-12-18 19:37:06,033 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 19:37:06,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-12-18 19:37:06,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 171. [2019-12-18 19:37:06,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-12-18 19:37:06,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 408 transitions. [2019-12-18 19:37:06,038 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 408 transitions. Word has length 14 [2019-12-18 19:37:06,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:06,039 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 408 transitions. [2019-12-18 19:37:06,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:06,039 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 408 transitions. [2019-12-18 19:37:06,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:06,040 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:06,040 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:06,243 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:06,243 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:06,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:06,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1603164096, now seen corresponding path program 89 times [2019-12-18 19:37:06,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:06,244 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160170162] [2019-12-18 19:37:06,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:06,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:06,349 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 19:37:06,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160170162] [2019-12-18 19:37:06,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725835962] [2019-12-18 19:37:06,350 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 19:37:06,395 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 19:37:06,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:06,396 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:06,397 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:06,531 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 19:37:06,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:06,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:06,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572690972] [2019-12-18 19:37:06,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:06,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:06,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:06,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:06,533 INFO L87 Difference]: Start difference. First operand 171 states and 408 transitions. Second operand 18 states. [2019-12-18 19:37:07,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:07,195 INFO L93 Difference]: Finished difference Result 269 states and 586 transitions. [2019-12-18 19:37:07,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 19:37:07,195 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:07,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:07,197 INFO L225 Difference]: With dead ends: 269 [2019-12-18 19:37:07,197 INFO L226 Difference]: Without dead ends: 266 [2019-12-18 19:37:07,198 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=372, Invalid=960, Unknown=0, NotChecked=0, Total=1332 [2019-12-18 19:37:07,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-12-18 19:37:07,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 171. [2019-12-18 19:37:07,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-12-18 19:37:07,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 408 transitions. [2019-12-18 19:37:07,202 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 408 transitions. Word has length 14 [2019-12-18 19:37:07,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:07,202 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 408 transitions. [2019-12-18 19:37:07,203 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:07,203 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 408 transitions. [2019-12-18 19:37:07,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:07,203 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:07,203 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:07,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:07,407 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:07,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:07,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1603168901, now seen corresponding path program 90 times [2019-12-18 19:37:07,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:07,408 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916677044] [2019-12-18 19:37:07,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:07,500 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 19:37:07,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916677044] [2019-12-18 19:37:07,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772141415] [2019-12-18 19:37:07,501 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 19:37:07,548 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:37:07,548 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:07,549 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:07,550 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:07,729 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 19:37:07,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:07,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:07,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004522468] [2019-12-18 19:37:07,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:07,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:07,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:07,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:07,731 INFO L87 Difference]: Start difference. First operand 171 states and 408 transitions. Second operand 18 states. [2019-12-18 19:37:08,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:08,427 INFO L93 Difference]: Finished difference Result 282 states and 615 transitions. [2019-12-18 19:37:08,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 19:37:08,428 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:08,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:08,429 INFO L225 Difference]: With dead ends: 282 [2019-12-18 19:37:08,429 INFO L226 Difference]: Without dead ends: 276 [2019-12-18 19:37:08,429 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 19:37:08,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2019-12-18 19:37:08,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 171. [2019-12-18 19:37:08,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-12-18 19:37:08,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 408 transitions. [2019-12-18 19:37:08,434 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 408 transitions. Word has length 14 [2019-12-18 19:37:08,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:08,434 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 408 transitions. [2019-12-18 19:37:08,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:08,434 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 408 transitions. [2019-12-18 19:37:08,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:08,435 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:08,435 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:08,635 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:08,636 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:08,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:08,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1603312896, now seen corresponding path program 91 times [2019-12-18 19:37:08,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:08,637 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609232369] [2019-12-18 19:37:08,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:08,743 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 19:37:08,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609232369] [2019-12-18 19:37:08,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115211866] [2019-12-18 19:37:08,744 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 19:37:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:08,788 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:08,788 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:08,917 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 19:37:08,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:08,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:08,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598208130] [2019-12-18 19:37:08,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:08,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:08,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:08,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:08,919 INFO L87 Difference]: Start difference. First operand 171 states and 408 transitions. Second operand 18 states. [2019-12-18 19:37:09,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:09,441 INFO L93 Difference]: Finished difference Result 275 states and 596 transitions. [2019-12-18 19:37:09,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 19:37:09,442 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:09,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:09,443 INFO L225 Difference]: With dead ends: 275 [2019-12-18 19:37:09,443 INFO L226 Difference]: Without dead ends: 270 [2019-12-18 19:37:09,443 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 19:37:09,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2019-12-18 19:37:09,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 173. [2019-12-18 19:37:09,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-12-18 19:37:09,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 414 transitions. [2019-12-18 19:37:09,452 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 414 transitions. Word has length 14 [2019-12-18 19:37:09,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:09,452 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 414 transitions. [2019-12-18 19:37:09,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:09,452 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 414 transitions. [2019-12-18 19:37:09,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:09,453 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:09,453 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:09,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:09,654 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:09,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:09,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1603313051, now seen corresponding path program 92 times [2019-12-18 19:37:09,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:09,655 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217218119] [2019-12-18 19:37:09,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:09,751 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 19:37:09,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217218119] [2019-12-18 19:37:09,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431905661] [2019-12-18 19:37:09,752 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 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 19:37:09,796 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:37:09,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:09,798 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:09,798 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:09,928 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 19:37:09,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:09,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:09,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669422665] [2019-12-18 19:37:09,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:09,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:09,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:09,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:09,931 INFO L87 Difference]: Start difference. First operand 173 states and 414 transitions. Second operand 18 states. [2019-12-18 19:37:10,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:10,370 INFO L93 Difference]: Finished difference Result 276 states and 607 transitions. [2019-12-18 19:37:10,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 19:37:10,371 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:10,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:10,372 INFO L225 Difference]: With dead ends: 276 [2019-12-18 19:37:10,372 INFO L226 Difference]: Without dead ends: 274 [2019-12-18 19:37:10,373 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2019-12-18 19:37:10,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-12-18 19:37:10,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 171. [2019-12-18 19:37:10,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-12-18 19:37:10,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 407 transitions. [2019-12-18 19:37:10,378 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 407 transitions. Word has length 14 [2019-12-18 19:37:10,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:10,378 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 407 transitions. [2019-12-18 19:37:10,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:10,378 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 407 transitions. [2019-12-18 19:37:10,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:10,379 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:10,379 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:10,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:10,582 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:10,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:10,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1603317701, now seen corresponding path program 93 times [2019-12-18 19:37:10,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:10,583 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836375043] [2019-12-18 19:37:10,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:10,677 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 19:37:10,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836375043] [2019-12-18 19:37:10,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201144231] [2019-12-18 19:37:10,678 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 19:37:10,723 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 19:37:10,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:10,724 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:10,725 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:10,877 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 19:37:10,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:10,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:10,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885646] [2019-12-18 19:37:10,878 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:10,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:10,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:10,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:10,879 INFO L87 Difference]: Start difference. First operand 171 states and 407 transitions. Second operand 18 states. [2019-12-18 19:37:11,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:11,433 INFO L93 Difference]: Finished difference Result 278 states and 603 transitions. [2019-12-18 19:37:11,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 19:37:11,433 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:11,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:11,434 INFO L225 Difference]: With dead ends: 278 [2019-12-18 19:37:11,434 INFO L226 Difference]: Without dead ends: 275 [2019-12-18 19:37:11,435 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 19:37:11,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2019-12-18 19:37:11,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 170. [2019-12-18 19:37:11,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-12-18 19:37:11,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 408 transitions. [2019-12-18 19:37:11,439 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 408 transitions. Word has length 14 [2019-12-18 19:37:11,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:11,439 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 408 transitions. [2019-12-18 19:37:11,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:11,439 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 408 transitions. [2019-12-18 19:37:11,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:11,440 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:11,440 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:11,640 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:11,641 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:11,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:11,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1607781701, now seen corresponding path program 94 times [2019-12-18 19:37:11,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:11,642 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770820206] [2019-12-18 19:37:11,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:11,739 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 19:37:11,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770820206] [2019-12-18 19:37:11,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184827097] [2019-12-18 19:37:11,739 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 19:37:11,777 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:37:11,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:11,778 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:11,779 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:14,135 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 19:37:14,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:14,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:14,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459949541] [2019-12-18 19:37:14,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:14,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:14,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:14,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=228, Unknown=4, NotChecked=0, Total=306 [2019-12-18 19:37:14,137 INFO L87 Difference]: Start difference. First operand 170 states and 408 transitions. Second operand 18 states. [2019-12-18 19:37:16,577 WARN L192 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2019-12-18 19:37:17,933 WARN L192 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 19:37:17,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:17,959 INFO L93 Difference]: Finished difference Result 261 states and 574 transitions. [2019-12-18 19:37:17,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 19:37:17,960 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:17,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:17,961 INFO L225 Difference]: With dead ends: 261 [2019-12-18 19:37:17,961 INFO L226 Difference]: Without dead ends: 259 [2019-12-18 19:37:17,961 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=349, Invalid=837, Unknown=4, NotChecked=0, Total=1190 [2019-12-18 19:37:17,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2019-12-18 19:37:17,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 165. [2019-12-18 19:37:17,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-12-18 19:37:17,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 394 transitions. [2019-12-18 19:37:17,965 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 394 transitions. Word has length 14 [2019-12-18 19:37:17,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:17,966 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 394 transitions. [2019-12-18 19:37:17,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:17,966 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 394 transitions. [2019-12-18 19:37:17,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:17,966 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:17,966 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:18,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:18,167 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:18,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:18,168 INFO L82 PathProgramCache]: Analyzing trace with hash -591203565, now seen corresponding path program 95 times [2019-12-18 19:37:18,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:18,168 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772446209] [2019-12-18 19:37:18,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:18,259 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 19:37:18,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772446209] [2019-12-18 19:37:18,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260990099] [2019-12-18 19:37:18,260 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 19:37:18,305 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:37:18,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:18,306 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:18,307 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:18,468 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 19:37:18,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:18,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:18,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694136917] [2019-12-18 19:37:18,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:18,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:18,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:18,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:18,471 INFO L87 Difference]: Start difference. First operand 165 states and 394 transitions. Second operand 18 states. [2019-12-18 19:37:18,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:18,959 INFO L93 Difference]: Finished difference Result 196 states and 442 transitions. [2019-12-18 19:37:18,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 19:37:18,960 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:18,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:18,960 INFO L225 Difference]: With dead ends: 196 [2019-12-18 19:37:18,961 INFO L226 Difference]: Without dead ends: 194 [2019-12-18 19:37:18,961 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2019-12-18 19:37:18,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-12-18 19:37:18,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 165. [2019-12-18 19:37:18,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-12-18 19:37:18,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 394 transitions. [2019-12-18 19:37:18,970 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 394 transitions. Word has length 14 [2019-12-18 19:37:18,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:18,970 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 394 transitions. [2019-12-18 19:37:18,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:18,970 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 394 transitions. [2019-12-18 19:37:18,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:18,971 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:18,971 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:19,171 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:19,174 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:19,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:19,175 INFO L82 PathProgramCache]: Analyzing trace with hash -591347715, now seen corresponding path program 96 times [2019-12-18 19:37:19,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:19,175 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316163235] [2019-12-18 19:37:19,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:19,282 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 19:37:19,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316163235] [2019-12-18 19:37:19,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669610432] [2019-12-18 19:37:19,282 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:37:19,328 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:37:19,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:19,329 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:19,330 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:21,321 WARN L192 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 19:37:21,321 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 19:37:21,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:21,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:21,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827929057] [2019-12-18 19:37:21,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:21,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:21,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:21,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=230, Unknown=3, NotChecked=0, Total=306 [2019-12-18 19:37:21,323 INFO L87 Difference]: Start difference. First operand 165 states and 394 transitions. Second operand 18 states. [2019-12-18 19:37:23,157 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-18 19:37:23,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:23,437 INFO L93 Difference]: Finished difference Result 217 states and 482 transitions. [2019-12-18 19:37:23,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 19:37:23,438 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:23,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:23,439 INFO L225 Difference]: With dead ends: 217 [2019-12-18 19:37:23,439 INFO L226 Difference]: Without dead ends: 215 [2019-12-18 19:37:23,439 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=302, Invalid=685, Unknown=5, NotChecked=0, Total=992 [2019-12-18 19:37:23,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-18 19:37:23,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 162. [2019-12-18 19:37:23,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-18 19:37:23,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 388 transitions. [2019-12-18 19:37:23,443 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 388 transitions. Word has length 14 [2019-12-18 19:37:23,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:23,443 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 388 transitions. [2019-12-18 19:37:23,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:23,444 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 388 transitions. [2019-12-18 19:37:23,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:23,444 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:23,444 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:23,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:23,645 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:23,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:23,645 INFO L82 PathProgramCache]: Analyzing trace with hash -591352365, now seen corresponding path program 97 times [2019-12-18 19:37:23,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:23,646 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194667589] [2019-12-18 19:37:23,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:23,748 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 19:37:23,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194667589] [2019-12-18 19:37:23,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376655139] [2019-12-18 19:37:23,748 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 19:37:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:23,793 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:23,794 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:23,963 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 19:37:23,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:23,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:23,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499628859] [2019-12-18 19:37:23,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:23,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:23,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:23,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:23,965 INFO L87 Difference]: Start difference. First operand 162 states and 388 transitions. Second operand 18 states. [2019-12-18 19:37:25,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:25,109 INFO L93 Difference]: Finished difference Result 210 states and 466 transitions. [2019-12-18 19:37:25,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 19:37:25,110 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:25,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:25,111 INFO L225 Difference]: With dead ends: 210 [2019-12-18 19:37:25,111 INFO L226 Difference]: Without dead ends: 207 [2019-12-18 19:37:25,111 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=313, Invalid=678, Unknown=1, NotChecked=0, Total=992 [2019-12-18 19:37:25,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-18 19:37:25,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 162. [2019-12-18 19:37:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-18 19:37:25,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 388 transitions. [2019-12-18 19:37:25,115 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 388 transitions. Word has length 14 [2019-12-18 19:37:25,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:25,115 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 388 transitions. [2019-12-18 19:37:25,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:25,116 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 388 transitions. [2019-12-18 19:37:25,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:25,116 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:25,116 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:25,316 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:25,317 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:25,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:25,317 INFO L82 PathProgramCache]: Analyzing trace with hash -595969970, now seen corresponding path program 98 times [2019-12-18 19:37:25,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:25,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477329370] [2019-12-18 19:37:25,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:25,413 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 19:37:25,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477329370] [2019-12-18 19:37:25,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259601180] [2019-12-18 19:37:25,414 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 19:37:25,457 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:37:25,458 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:25,459 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:25,466 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:25,651 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 19:37:25,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:25,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:25,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843362211] [2019-12-18 19:37:25,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:25,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:25,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:25,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:25,652 INFO L87 Difference]: Start difference. First operand 162 states and 388 transitions. Second operand 18 states. [2019-12-18 19:37:26,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:26,766 INFO L93 Difference]: Finished difference Result 231 states and 509 transitions. [2019-12-18 19:37:26,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:37:26,767 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:26,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:26,768 INFO L225 Difference]: With dead ends: 231 [2019-12-18 19:37:26,768 INFO L226 Difference]: Without dead ends: 229 [2019-12-18 19:37:26,768 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=353, Invalid=768, Unknown=1, NotChecked=0, Total=1122 [2019-12-18 19:37:26,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-12-18 19:37:26,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 160. [2019-12-18 19:37:26,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-12-18 19:37:26,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 381 transitions. [2019-12-18 19:37:26,772 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 381 transitions. Word has length 14 [2019-12-18 19:37:26,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:26,772 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 381 transitions. [2019-12-18 19:37:26,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:26,772 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 381 transitions. [2019-12-18 19:37:26,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:26,772 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:26,772 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:26,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:26,973 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:26,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:26,974 INFO L82 PathProgramCache]: Analyzing trace with hash -734498275, now seen corresponding path program 99 times [2019-12-18 19:37:26,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:26,975 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059926416] [2019-12-18 19:37:26,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:27,073 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 19:37:27,073 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059926416] [2019-12-18 19:37:27,073 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905092116] [2019-12-18 19:37:27,074 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 19:37:27,121 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 19:37:27,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:27,121 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:27,122 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:27,388 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 19:37:27,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:27,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:27,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131575815] [2019-12-18 19:37:27,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:27,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:27,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:27,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:27,389 INFO L87 Difference]: Start difference. First operand 160 states and 381 transitions. Second operand 18 states. [2019-12-18 19:37:28,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:28,566 INFO L93 Difference]: Finished difference Result 227 states and 495 transitions. [2019-12-18 19:37:28,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-18 19:37:28,566 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:28,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:28,567 INFO L225 Difference]: With dead ends: 227 [2019-12-18 19:37:28,567 INFO L226 Difference]: Without dead ends: 216 [2019-12-18 19:37:28,568 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=415, Invalid=1067, Unknown=0, NotChecked=0, Total=1482 [2019-12-18 19:37:28,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-12-18 19:37:28,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 155. [2019-12-18 19:37:28,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-18 19:37:28,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 361 transitions. [2019-12-18 19:37:28,571 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 361 transitions. Word has length 14 [2019-12-18 19:37:28,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:28,572 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 361 transitions. [2019-12-18 19:37:28,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:28,572 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 361 transitions. [2019-12-18 19:37:28,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:28,572 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:28,572 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:28,775 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:28,776 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:28,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:28,776 INFO L82 PathProgramCache]: Analyzing trace with hash -733754519, now seen corresponding path program 100 times [2019-12-18 19:37:28,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:28,777 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294654627] [2019-12-18 19:37:28,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:28,879 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 19:37:28,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294654627] [2019-12-18 19:37:28,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225947892] [2019-12-18 19:37:28,880 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 19:37:28,924 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:37:28,924 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:28,925 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:28,925 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:30,077 WARN L192 SmtUtils]: Spent 578.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-18 19:37:30,078 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 19:37:30,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:30,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:30,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555369193] [2019-12-18 19:37:30,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:30,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:30,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:30,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=230, Unknown=1, NotChecked=0, Total=306 [2019-12-18 19:37:30,080 INFO L87 Difference]: Start difference. First operand 155 states and 361 transitions. Second operand 18 states. [2019-12-18 19:37:31,224 WARN L192 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2019-12-18 19:37:32,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:32,782 INFO L93 Difference]: Finished difference Result 229 states and 491 transitions. [2019-12-18 19:37:32,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-18 19:37:32,782 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:32,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:32,783 INFO L225 Difference]: With dead ends: 229 [2019-12-18 19:37:32,783 INFO L226 Difference]: Without dead ends: 226 [2019-12-18 19:37:32,784 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=369, Invalid=890, Unknown=1, NotChecked=0, Total=1260 [2019-12-18 19:37:32,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-18 19:37:32,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 152. [2019-12-18 19:37:32,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 19:37:32,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 351 transitions. [2019-12-18 19:37:32,787 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 351 transitions. Word has length 14 [2019-12-18 19:37:32,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:32,787 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 351 transitions. [2019-12-18 19:37:32,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:32,787 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 351 transitions. [2019-12-18 19:37:32,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:32,788 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:32,788 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:32,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:32,990 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:32,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:32,991 INFO L82 PathProgramCache]: Analyzing trace with hash -738367319, now seen corresponding path program 101 times [2019-12-18 19:37:32,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:32,991 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716261869] [2019-12-18 19:37:32,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:33,085 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 19:37:33,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716261869] [2019-12-18 19:37:33,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922960613] [2019-12-18 19:37:33,086 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 19:37:33,131 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:37:33,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:33,132 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:33,132 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:33,277 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 19:37:33,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:33,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:33,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022463160] [2019-12-18 19:37:33,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:33,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:33,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:33,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:33,279 INFO L87 Difference]: Start difference. First operand 152 states and 351 transitions. Second operand 18 states. [2019-12-18 19:37:33,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:33,801 INFO L93 Difference]: Finished difference Result 222 states and 471 transitions. [2019-12-18 19:37:33,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 19:37:33,801 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:33,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:33,802 INFO L225 Difference]: With dead ends: 222 [2019-12-18 19:37:33,802 INFO L226 Difference]: Without dead ends: 216 [2019-12-18 19:37:33,803 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=338, Invalid=852, Unknown=0, NotChecked=0, Total=1190 [2019-12-18 19:37:33,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-12-18 19:37:33,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 148. [2019-12-18 19:37:33,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-18 19:37:33,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 336 transitions. [2019-12-18 19:37:33,806 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 336 transitions. Word has length 14 [2019-12-18 19:37:33,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:33,807 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 336 transitions. [2019-12-18 19:37:33,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:33,807 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 336 transitions. [2019-12-18 19:37:33,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:33,807 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:33,807 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:34,007 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:34,008 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:34,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:34,008 INFO L82 PathProgramCache]: Analyzing trace with hash -738367474, now seen corresponding path program 102 times [2019-12-18 19:37:34,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:34,009 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501692428] [2019-12-18 19:37:34,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:34,117 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 19:37:34,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501692428] [2019-12-18 19:37:34,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013251320] [2019-12-18 19:37:34,118 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 19:37:34,167 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:37:34,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:34,167 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:34,168 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:34,300 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 19:37:34,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:34,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:34,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681567975] [2019-12-18 19:37:34,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:34,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:34,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:34,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:34,302 INFO L87 Difference]: Start difference. First operand 148 states and 336 transitions. Second operand 18 states. [2019-12-18 19:37:34,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:34,876 INFO L93 Difference]: Finished difference Result 237 states and 503 transitions. [2019-12-18 19:37:34,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 19:37:34,877 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:34,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:34,878 INFO L225 Difference]: With dead ends: 237 [2019-12-18 19:37:34,878 INFO L226 Difference]: Without dead ends: 236 [2019-12-18 19:37:34,878 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 19:37:34,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-12-18 19:37:34,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 147. [2019-12-18 19:37:34,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-18 19:37:34,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 333 transitions. [2019-12-18 19:37:34,882 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 333 transitions. Word has length 14 [2019-12-18 19:37:34,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:34,882 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 333 transitions. [2019-12-18 19:37:34,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:34,882 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 333 transitions. [2019-12-18 19:37:34,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:34,883 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:34,883 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:35,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:35,084 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:35,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:35,084 INFO L82 PathProgramCache]: Analyzing trace with hash -738372124, now seen corresponding path program 103 times [2019-12-18 19:37:35,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:35,085 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768620950] [2019-12-18 19:37:35,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:35,180 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 19:37:35,180 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768620950] [2019-12-18 19:37:35,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934014641] [2019-12-18 19:37:35,181 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 19:37:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:35,225 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:35,226 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:35,385 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 19:37:35,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:35,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:35,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665674756] [2019-12-18 19:37:35,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:35,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:35,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:35,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:35,387 INFO L87 Difference]: Start difference. First operand 147 states and 333 transitions. Second operand 18 states. [2019-12-18 19:37:35,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:35,786 INFO L93 Difference]: Finished difference Result 245 states and 516 transitions. [2019-12-18 19:37:35,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 19:37:35,786 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:35,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:35,787 INFO L225 Difference]: With dead ends: 245 [2019-12-18 19:37:35,788 INFO L226 Difference]: Without dead ends: 243 [2019-12-18 19:37:35,788 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2019-12-18 19:37:35,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-18 19:37:35,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 147. [2019-12-18 19:37:35,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-18 19:37:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 333 transitions. [2019-12-18 19:37:35,791 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 333 transitions. Word has length 14 [2019-12-18 19:37:35,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:35,791 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 333 transitions. [2019-12-18 19:37:35,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:35,791 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 333 transitions. [2019-12-18 19:37:35,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:35,792 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:35,792 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:35,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:35,992 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:35,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:35,993 INFO L82 PathProgramCache]: Analyzing trace with hash -738372279, now seen corresponding path program 104 times [2019-12-18 19:37:35,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:35,994 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573731737] [2019-12-18 19:37:35,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:35,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:36,088 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 19:37:36,088 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573731737] [2019-12-18 19:37:36,088 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137523651] [2019-12-18 19:37:36,088 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 19:37:36,133 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:37:36,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:36,134 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:36,135 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:36,265 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 19:37:36,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:36,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:36,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512552052] [2019-12-18 19:37:36,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:36,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:36,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:36,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:36,267 INFO L87 Difference]: Start difference. First operand 147 states and 333 transitions. Second operand 18 states. [2019-12-18 19:37:36,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:36,783 INFO L93 Difference]: Finished difference Result 248 states and 521 transitions. [2019-12-18 19:37:36,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 19:37:36,783 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:36,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:36,784 INFO L225 Difference]: With dead ends: 248 [2019-12-18 19:37:36,784 INFO L226 Difference]: Without dead ends: 239 [2019-12-18 19:37:36,785 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 19:37:36,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-12-18 19:37:36,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 145. [2019-12-18 19:37:36,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 19:37:36,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 323 transitions. [2019-12-18 19:37:36,788 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 323 transitions. Word has length 14 [2019-12-18 19:37:36,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:36,788 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 323 transitions. [2019-12-18 19:37:36,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:36,788 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 323 transitions. [2019-12-18 19:37:36,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:36,789 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:36,789 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:36,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:36,990 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:36,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:36,990 INFO L82 PathProgramCache]: Analyzing trace with hash -738516274, now seen corresponding path program 105 times [2019-12-18 19:37:36,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:36,991 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343059997] [2019-12-18 19:37:36,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:37,080 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 19:37:37,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343059997] [2019-12-18 19:37:37,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581291415] [2019-12-18 19:37:37,081 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 19:37:37,125 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 19:37:37,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:37,126 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:37,127 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:37,262 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 19:37:37,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:37,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:37,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103929712] [2019-12-18 19:37:37,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:37,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:37,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:37,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:37,263 INFO L87 Difference]: Start difference. First operand 145 states and 323 transitions. Second operand 18 states. [2019-12-18 19:37:37,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:37,942 INFO L93 Difference]: Finished difference Result 231 states and 487 transitions. [2019-12-18 19:37:37,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 19:37:37,947 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:37,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:37,948 INFO L225 Difference]: With dead ends: 231 [2019-12-18 19:37:37,948 INFO L226 Difference]: Without dead ends: 229 [2019-12-18 19:37:37,949 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 19:37:37,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-12-18 19:37:37,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 144. [2019-12-18 19:37:37,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 19:37:37,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 319 transitions. [2019-12-18 19:37:37,952 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 319 transitions. Word has length 14 [2019-12-18 19:37:37,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:37,952 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 319 transitions. [2019-12-18 19:37:37,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:37,952 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 319 transitions. [2019-12-18 19:37:37,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:37,953 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:37,953 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:38,156 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:38,156 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:38,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:38,157 INFO L82 PathProgramCache]: Analyzing trace with hash -738516429, now seen corresponding path program 106 times [2019-12-18 19:37:38,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:38,157 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919974967] [2019-12-18 19:37:38,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:38,252 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 19:37:38,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919974967] [2019-12-18 19:37:38,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137827249] [2019-12-18 19:37:38,253 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 19:37:38,301 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:37:38,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:38,302 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:38,302 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:39,034 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 19:37:39,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:39,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:39,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494407343] [2019-12-18 19:37:39,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:39,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:39,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:39,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:39,036 INFO L87 Difference]: Start difference. First operand 144 states and 319 transitions. Second operand 18 states. [2019-12-18 19:37:41,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:41,731 INFO L93 Difference]: Finished difference Result 235 states and 487 transitions. [2019-12-18 19:37:41,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 19:37:41,732 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:41,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:41,733 INFO L225 Difference]: With dead ends: 235 [2019-12-18 19:37:41,733 INFO L226 Difference]: Without dead ends: 231 [2019-12-18 19:37:41,733 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=353, Invalid=835, Unknown=2, NotChecked=0, Total=1190 [2019-12-18 19:37:41,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-12-18 19:37:41,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 138. [2019-12-18 19:37:41,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 19:37:41,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 299 transitions. [2019-12-18 19:37:41,737 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 299 transitions. Word has length 14 [2019-12-18 19:37:41,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:41,737 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 299 transitions. [2019-12-18 19:37:41,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:41,737 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 299 transitions. [2019-12-18 19:37:41,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:41,737 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:41,737 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:41,938 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:41,938 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:41,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:41,939 INFO L82 PathProgramCache]: Analyzing trace with hash -876900274, now seen corresponding path program 107 times [2019-12-18 19:37:41,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:41,939 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938141039] [2019-12-18 19:37:41,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:42,035 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 19:37:42,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938141039] [2019-12-18 19:37:42,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071323627] [2019-12-18 19:37:42,035 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 19:37:42,081 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 19:37:42,082 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:42,083 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:42,083 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:42,816 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 19:37:42,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:42,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:42,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520173778] [2019-12-18 19:37:42,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:42,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:42,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:42,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=230, Unknown=1, NotChecked=0, Total=306 [2019-12-18 19:37:42,818 INFO L87 Difference]: Start difference. First operand 138 states and 299 transitions. Second operand 18 states. [2019-12-18 19:37:44,887 WARN L192 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-18 19:37:46,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:46,920 INFO L93 Difference]: Finished difference Result 228 states and 467 transitions. [2019-12-18 19:37:46,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 19:37:46,920 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:46,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:46,921 INFO L225 Difference]: With dead ends: 228 [2019-12-18 19:37:46,921 INFO L226 Difference]: Without dead ends: 227 [2019-12-18 19:37:46,922 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=410, Invalid=921, Unknown=1, NotChecked=0, Total=1332 [2019-12-18 19:37:46,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-18 19:37:46,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 134. [2019-12-18 19:37:46,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-18 19:37:46,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 283 transitions. [2019-12-18 19:37:46,925 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 283 transitions. Word has length 14 [2019-12-18 19:37:46,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:46,926 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 283 transitions. [2019-12-18 19:37:46,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:46,926 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 283 transitions. [2019-12-18 19:37:46,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:46,926 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:46,926 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:47,126 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:47,127 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:47,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:47,127 INFO L82 PathProgramCache]: Analyzing trace with hash -877049384, now seen corresponding path program 108 times [2019-12-18 19:37:47,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:47,128 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379603463] [2019-12-18 19:37:47,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:47,237 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 19:37:47,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379603463] [2019-12-18 19:37:47,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394888572] [2019-12-18 19:37:47,237 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 19:37:47,279 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:37:47,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:47,280 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:47,281 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:48,860 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_372 Int)) (and (<= c_~i~0 (+ v_~j~0_372 2)) (<= (div (+ (* v_~j~0_372 (- 1)) 1) (- 2)) 2) (<= c_~j~0 (+ v_~j~0_372 (* 2 c_~i~0))))) is different from true [2019-12-18 19:37:49,728 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 19:37:49,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:49,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:49,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624423796] [2019-12-18 19:37:49,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:49,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:49,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:49,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=205, Unknown=1, NotChecked=30, Total=306 [2019-12-18 19:37:49,730 INFO L87 Difference]: Start difference. First operand 134 states and 283 transitions. Second operand 18 states. [2019-12-18 19:37:54,533 WARN L192 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2019-12-18 19:37:55,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:55,548 INFO L93 Difference]: Finished difference Result 197 states and 394 transitions. [2019-12-18 19:37:55,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-18 19:37:55,548 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:55,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:55,549 INFO L225 Difference]: With dead ends: 197 [2019-12-18 19:37:55,549 INFO L226 Difference]: Without dead ends: 189 [2019-12-18 19:37:55,550 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=437, Invalid=1121, Unknown=6, NotChecked=76, Total=1640 [2019-12-18 19:37:55,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-18 19:37:55,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 131. [2019-12-18 19:37:55,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-18 19:37:55,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 272 transitions. [2019-12-18 19:37:55,553 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 272 transitions. Word has length 14 [2019-12-18 19:37:55,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:55,553 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 272 transitions. [2019-12-18 19:37:55,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:55,554 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 272 transitions. [2019-12-18 19:37:55,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:37:55,554 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:55,554 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:55,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:55,755 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:55,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:55,755 INFO L82 PathProgramCache]: Analyzing trace with hash -881666834, now seen corresponding path program 109 times [2019-12-18 19:37:55,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:55,756 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106452910] [2019-12-18 19:37:55,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:55,851 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 19:37:55,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106452910] [2019-12-18 19:37:55,852 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660406680] [2019-12-18 19:37:55,852 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 19:37:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:55,891 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:37:55,892 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:56,038 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 19:37:56,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:56,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 19:37:56,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826676529] [2019-12-18 19:37:56,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 19:37:56,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:56,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 19:37:56,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:37:56,040 INFO L87 Difference]: Start difference. First operand 131 states and 272 transitions. Second operand 18 states. [2019-12-18 19:37:56,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:56,686 INFO L93 Difference]: Finished difference Result 161 states and 323 transitions. [2019-12-18 19:37:56,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 19:37:56,687 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 19:37:56,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:56,687 INFO L225 Difference]: With dead ends: 161 [2019-12-18 19:37:56,687 INFO L226 Difference]: Without dead ends: 159 [2019-12-18 19:37:56,688 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 19:37:56,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-18 19:37:56,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 121. [2019-12-18 19:37:56,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-18 19:37:56,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 247 transitions. [2019-12-18 19:37:56,691 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 247 transitions. Word has length 14 [2019-12-18 19:37:56,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:56,691 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 247 transitions. [2019-12-18 19:37:56,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 19:37:56,691 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 247 transitions. [2019-12-18 19:37:56,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 19:37:56,692 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:56,692 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:56,892 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:56,893 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:56,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:56,893 INFO L82 PathProgramCache]: Analyzing trace with hash -916943731, now seen corresponding path program 110 times [2019-12-18 19:37:56,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:56,894 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995034073] [2019-12-18 19:37:56,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:57,009 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 19:37:57,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995034073] [2019-12-18 19:37:57,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58132068] [2019-12-18 19:37:57,009 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 19:37:57,053 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:37:57,054 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:57,054 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 19:37:57,055 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:57,238 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 19:37:57,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:57,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-18 19:37:57,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528473720] [2019-12-18 19:37:57,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 19:37:57,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:57,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 19:37:57,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2019-12-18 19:37:57,240 INFO L87 Difference]: Start difference. First operand 121 states and 247 transitions. Second operand 20 states. [2019-12-18 19:37:57,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:57,874 INFO L93 Difference]: Finished difference Result 164 states and 329 transitions. [2019-12-18 19:37:57,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:37:57,875 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2019-12-18 19:37:57,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:57,875 INFO L225 Difference]: With dead ends: 164 [2019-12-18 19:37:57,876 INFO L226 Difference]: Without dead ends: 162 [2019-12-18 19:37:57,876 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 19:37:57,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-18 19:37:57,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 122. [2019-12-18 19:37:57,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-12-18 19:37:57,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 251 transitions. [2019-12-18 19:37:57,879 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 251 transitions. Word has length 15 [2019-12-18 19:37:57,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:57,879 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 251 transitions. [2019-12-18 19:37:57,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 19:37:57,879 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 251 transitions. [2019-12-18 19:37:57,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 19:37:57,879 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:57,879 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:58,080 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:58,080 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:58,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:58,081 INFO L82 PathProgramCache]: Analyzing trace with hash -884620496, now seen corresponding path program 111 times [2019-12-18 19:37:58,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:58,081 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494346063] [2019-12-18 19:37:58,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:58,193 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 19:37:58,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494346063] [2019-12-18 19:37:58,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410020907] [2019-12-18 19:37:58,194 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 19:37:58,243 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 19:37:58,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:58,244 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 19:37:58,245 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:58,439 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 19:37:58,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:58,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-18 19:37:58,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188836301] [2019-12-18 19:37:58,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 19:37:58,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:58,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 19:37:58,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2019-12-18 19:37:58,441 INFO L87 Difference]: Start difference. First operand 122 states and 251 transitions. Second operand 20 states. [2019-12-18 19:37:59,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:37:59,040 INFO L93 Difference]: Finished difference Result 170 states and 341 transitions. [2019-12-18 19:37:59,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 19:37:59,041 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2019-12-18 19:37:59,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:37:59,042 INFO L225 Difference]: With dead ends: 170 [2019-12-18 19:37:59,042 INFO L226 Difference]: Without dead ends: 161 [2019-12-18 19:37:59,042 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 19:37:59,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-18 19:37:59,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 131. [2019-12-18 19:37:59,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-18 19:37:59,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 275 transitions. [2019-12-18 19:37:59,045 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 275 transitions. Word has length 15 [2019-12-18 19:37:59,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:37:59,046 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 275 transitions. [2019-12-18 19:37:59,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 19:37:59,046 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 275 transitions. [2019-12-18 19:37:59,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 19:37:59,046 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:37:59,046 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:37:59,246 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:37:59,247 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:37:59,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:37:59,247 INFO L82 PathProgramCache]: Analyzing trace with hash -884620651, now seen corresponding path program 112 times [2019-12-18 19:37:59,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:37:59,248 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244416830] [2019-12-18 19:37:59,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:37:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:37:59,368 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 19:37:59,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244416830] [2019-12-18 19:37:59,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870262313] [2019-12-18 19:37:59,369 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 19:37:59,415 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:37:59,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:37:59,416 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 19:37:59,419 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:37:59,765 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 19:37:59,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:37:59,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-18 19:37:59,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283106307] [2019-12-18 19:37:59,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 19:37:59,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:37:59,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 19:37:59,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2019-12-18 19:37:59,768 INFO L87 Difference]: Start difference. First operand 131 states and 275 transitions. Second operand 20 states. [2019-12-18 19:38:01,593 WARN L192 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2019-12-18 19:38:02,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:38:02,748 INFO L93 Difference]: Finished difference Result 204 states and 409 transitions. [2019-12-18 19:38:02,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 19:38:02,749 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2019-12-18 19:38:02,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:38:02,750 INFO L225 Difference]: With dead ends: 204 [2019-12-18 19:38:02,750 INFO L226 Difference]: Without dead ends: 201 [2019-12-18 19:38:02,750 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=432, Invalid=974, Unknown=0, NotChecked=0, Total=1406 [2019-12-18 19:38:02,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-12-18 19:38:02,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 131. [2019-12-18 19:38:02,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-18 19:38:02,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 274 transitions. [2019-12-18 19:38:02,754 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 274 transitions. Word has length 15 [2019-12-18 19:38:02,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:38:02,754 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 274 transitions. [2019-12-18 19:38:02,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 19:38:02,754 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 274 transitions. [2019-12-18 19:38:02,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 19:38:02,754 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:38:02,754 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:38:02,955 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:38:02,955 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:38:02,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:38:02,956 INFO L82 PathProgramCache]: Analyzing trace with hash -884625301, now seen corresponding path program 113 times [2019-12-18 19:38:02,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:38:02,956 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445964833] [2019-12-18 19:38:02,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:38:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:38:03,068 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 19:38:03,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445964833] [2019-12-18 19:38:03,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595118223] [2019-12-18 19:38:03,069 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 19:38:03,116 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 19:38:03,116 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:38:03,117 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 19:38:03,119 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:38:03,828 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 19:38:03,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:38:03,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-18 19:38:03,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365947156] [2019-12-18 19:38:03,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 19:38:03,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:38:03,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 19:38:03,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=291, Unknown=1, NotChecked=0, Total=380 [2019-12-18 19:38:03,829 INFO L87 Difference]: Start difference. First operand 131 states and 274 transitions. Second operand 20 states. [2019-12-18 19:38:06,033 WARN L192 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2019-12-18 19:38:06,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:38:06,264 INFO L93 Difference]: Finished difference Result 210 states and 421 transitions. [2019-12-18 19:38:06,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-18 19:38:06,265 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2019-12-18 19:38:06,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:38:06,266 INFO L225 Difference]: With dead ends: 210 [2019-12-18 19:38:06,266 INFO L226 Difference]: Without dead ends: 208 [2019-12-18 19:38:06,266 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=428, Invalid=977, Unknown=1, NotChecked=0, Total=1406 [2019-12-18 19:38:06,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-12-18 19:38:06,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 131. [2019-12-18 19:38:06,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-18 19:38:06,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 274 transitions. [2019-12-18 19:38:06,270 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 274 transitions. Word has length 15 [2019-12-18 19:38:06,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:38:06,270 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 274 transitions. [2019-12-18 19:38:06,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 19:38:06,270 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 274 transitions. [2019-12-18 19:38:06,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 19:38:06,270 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:38:06,271 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:38:06,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:38:06,471 INFO L410 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:38:06,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:38:06,472 INFO L82 PathProgramCache]: Analyzing trace with hash -884769451, now seen corresponding path program 114 times [2019-12-18 19:38:06,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:38:06,472 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821591209] [2019-12-18 19:38:06,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:38:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:38:06,586 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 19:38:06,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821591209] [2019-12-18 19:38:06,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68942412] [2019-12-18 19:38:06,586 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 19:38:06,632 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 19:38:06,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:38:06,633 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 19:38:06,634 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:38:07,292 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 19:38:07,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:38:07,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-18 19:38:07,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992059774] [2019-12-18 19:38:07,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 19:38:07,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:38:07,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 19:38:07,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=292, Unknown=1, NotChecked=0, Total=380 [2019-12-18 19:38:07,293 INFO L87 Difference]: Start difference. First operand 131 states and 274 transitions. Second operand 20 states. Received shutdown request... [2019-12-18 19:38:08,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 19:38:08,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:38:08,573 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-18 19:38:08,577 WARN L227 ceAbstractionStarter]: Timeout [2019-12-18 19:38:08,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 07:38:08 BasicIcfg [2019-12-18 19:38:08,578 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-18 19:38:08,579 INFO L168 Benchmark]: Toolchain (without parser) took 284870.54 ms. Allocated memory was 137.4 MB in the beginning and 178.3 MB in the end (delta: 40.9 MB). Free memory was 99.3 MB in the beginning and 78.3 MB in the end (delta: 21.0 MB). Peak memory consumption was 61.9 MB. Max. memory is 7.1 GB. [2019-12-18 19:38:08,579 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 137.4 MB. Free memory was 119.3 MB in the beginning and 119.1 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-12-18 19:38:08,580 INFO L168 Benchmark]: CACSL2BoogieTranslator took 730.07 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 98.9 MB in the beginning and 161.1 MB in the end (delta: -62.1 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2019-12-18 19:38:08,580 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.31 ms. Allocated memory is still 201.9 MB. Free memory was 161.1 MB in the beginning and 159.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-18 19:38:08,580 INFO L168 Benchmark]: Boogie Preprocessor took 24.93 ms. Allocated memory is still 201.9 MB. Free memory was 159.1 MB in the beginning and 157.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-12-18 19:38:08,580 INFO L168 Benchmark]: RCFGBuilder took 419.71 ms. Allocated memory is still 201.9 MB. Free memory was 157.7 MB in the beginning and 137.6 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2019-12-18 19:38:08,581 INFO L168 Benchmark]: TraceAbstraction took 283644.32 ms. Allocated memory was 201.9 MB in the beginning and 178.3 MB in the end (delta: -23.6 MB). Free memory was 137.6 MB in the beginning and 78.3 MB in the end (delta: 59.3 MB). Peak memory consumption was 35.7 MB. Max. memory is 7.1 GB. [2019-12-18 19:38:08,583 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 137.4 MB. Free memory was 119.3 MB in the beginning and 119.1 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 730.07 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 98.9 MB in the beginning and 161.1 MB in the end (delta: -62.1 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.31 ms. Allocated memory is still 201.9 MB. Free memory was 161.1 MB in the beginning and 159.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.93 ms. Allocated memory is still 201.9 MB. Free memory was 159.1 MB in the beginning and 157.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 419.71 ms. Allocated memory is still 201.9 MB. Free memory was 157.7 MB in the beginning and 137.6 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 283644.32 ms. Allocated memory was 201.9 MB in the beginning and 178.3 MB in the end (delta: -23.6 MB). Free memory was 137.6 MB in the beginning and 78.3 MB in the end (delta: 59.3 MB). Peak memory consumption was 35.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 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 constructing difference of abstraction (131states) and FLOYD_HOARE automaton (currently 11 states, 20 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 28 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 283.5s, OverallIterations: 127, TraceHistogramMax: 6, AutomataDifference: 157.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1365 SDtfs, 17503 SDslu, 11321 SDs, 0 SdLazy, 7025 SolverSat, 4414 SolverUnsat, 37 SolverUnknown, 0 SolverNotchecked, 57.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3803 GetRequests, 603 SyntacticMatches, 5 SemanticMatches, 3194 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 19883 ImplicationChecksByTransitivity, 186.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=177occurred in iteration=59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 126 MinimizatonAttempts, 6464 StatesRemovedByMinimization, 123 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 91.2s InterpolantComputationTime, 3189 NumberOfCodeBlocks, 3189 NumberOfCodeBlocksAsserted, 410 NumberOfCheckSat, 2940 ConstructedInterpolants, 122 QuantifiedInterpolants, 453169 SizeOfPredicates, 0 NumberOfNonLiveVariables, 11408 ConjunctsInSsa, 1336 ConjunctsInUnsatCore, 249 InterpolantComputations, 7 PerfectInterpolantSequences, 30/1874 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