/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 0.1.25-4336eb1 [2019-12-27 04:38:21,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 04:38:21,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 04:38:21,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 04:38:21,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 04:38:21,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 04:38:21,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 04:38:21,325 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 04:38:21,327 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 04:38:21,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 04:38:21,329 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 04:38:21,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 04:38:21,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 04:38:21,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 04:38:21,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 04:38:21,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 04:38:21,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 04:38:21,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 04:38:21,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 04:38:21,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-27 04:38:21,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-27 04:38:21,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 04:38:21,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 04:38:21,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 04:38:21,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-12-27 04:38:21,362 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 04:38:21,365 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 04:38:21,366 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 04:38:21,367 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 04:38:21,368 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 04:38:21,368 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 04:38:21,371 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 04:38:21,371 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 04:38:21,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 04:38:21,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 04:38:21,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 04:38:21,375 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 [2019-12-27 04:38:21,400 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 04:38:21,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 04:38:21,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 04:38:21,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 04:38:21,403 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 04:38:21,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 04:38:21,404 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 04:38:21,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 04:38:21,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 04:38:21,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 04:38:21,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 04:38:21,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 04:38:21,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 04:38:21,406 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 04:38:21,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 04:38:21,406 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 04:38:21,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 04:38:21,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 04:38:21,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 04:38:21,407 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 04:38:21,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 04:38:21,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 04:38:21,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 04:38:21,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 04:38:21,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 04:38:21,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 04:38:21,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 04:38:21,409 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2019-12-27 04:38:21,409 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 04:38:21,409 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-27 04:38:21,729 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-27 04:38:21,743 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 04:38:21,747 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 04:38:21,748 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-27 04:38:21,748 INFO L275 PluginConnector]: CDTParser initialized [2019-12-27 04:38:21,749 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-1.i [2019-12-27 04:38:21,813 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6af658c86/7eb5f1fb2b194195956bf1c58353ed65/FLAG402df0950 [2019-12-27 04:38:22,345 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 04:38:22,346 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i [2019-12-27 04:38:22,360 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6af658c86/7eb5f1fb2b194195956bf1c58353ed65/FLAG402df0950 [2019-12-27 04:38:22,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6af658c86/7eb5f1fb2b194195956bf1c58353ed65 [2019-12-27 04:38:22,601 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 04:38:22,603 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 04:38:22,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 04:38:22,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 04:38:22,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 04:38:22,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 04:38:22" (1/1) ... [2019-12-27 04:38:22,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@679bb618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:22, skipping insertion in model container [2019-12-27 04:38:22,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 04:38:22" (1/1) ... [2019-12-27 04:38:22,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 04:38:22,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 04:38:23,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 04:38:23,156 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 04:38:23,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 04:38:23,291 INFO L208 MainTranslator]: Completed translation [2019-12-27 04:38:23,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23 WrapperNode [2019-12-27 04:38:23,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 04:38:23,293 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 04:38:23,293 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 04:38:23,293 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 04:38:23,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,318 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 04:38:23,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 04:38:23,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 04:38:23,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 04:38:23,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 04:38:23,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 04:38:23,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 04:38:23,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 04:38:23,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (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 [2019-12-27 04:38:23,435 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-27 04:38:23,436 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-27 04:38:23,436 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-27 04:38:23,436 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-27 04:38:23,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 04:38:23,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-27 04:38:23,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 04:38:23,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 04:38:23,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-27 04:38:23,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 04:38:23,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 04:38:23,439 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-27 04:38:23,753 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 04:38:23,754 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-27 04:38:23,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 04:38:23 BoogieIcfgContainer [2019-12-27 04:38:23,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 04:38:23,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 04:38:23,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 04:38:23,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 04:38:23,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 04:38:22" (1/3) ... [2019-12-27 04:38:23,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f04b776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 04:38:23, skipping insertion in model container [2019-12-27 04:38:23,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (2/3) ... [2019-12-27 04:38:23,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f04b776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 04:38:23, skipping insertion in model container [2019-12-27 04:38:23,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 04:38:23" (3/3) ... [2019-12-27 04:38:23,764 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2019-12-27 04:38:23,775 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 04:38:23,775 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 04:38:23,782 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 04:38:23,783 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 04:38:23,812 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,813 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,813 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,813 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,814 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,814 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,814 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,815 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,815 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,815 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,816 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,816 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,816 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,817 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,817 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,817 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,818 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,818 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,818 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,818 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,819 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,819 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,820 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,820 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,820 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,820 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,821 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,821 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,821 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,822 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,826 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,826 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,826 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,827 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,827 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,827 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,842 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,843 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,843 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,843 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,844 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,844 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,863 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-27 04:38:23,886 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 04:38:23,887 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 04:38:23,887 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 04:38:23,887 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-27 04:38:23,887 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 04:38:23,887 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 04:38:23,888 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 04:38:23,888 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 04:38:23,901 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-27 04:38:23,903 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 04:38:23,946 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 04:38:23,947 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 04:38:23,958 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. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-27 04:38:23,962 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 04:38:23,990 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 04:38:23,990 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 04:38:23,992 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. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-27 04:38:23,995 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-27 04:38:23,996 INFO L182 etLargeBlockEncoding]: Variable Check. [2019-12-27 04:38:25,177 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-27 04:38:25,293 INFO L206 etLargeBlockEncoding]: Checked pairs total: 686 [2019-12-27 04:38:25,293 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-27 04:38:25,299 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-27 04:38:25,311 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-27 04:38:25,313 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-27 04:38:25,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-27 04:38:25,322 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:25,323 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-27 04:38:25,323 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:25,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:25,331 INFO L82 PathProgramCache]: Analyzing trace with hash 214338580, now seen corresponding path program 1 times [2019-12-27 04:38:25,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:25,345 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297783162] [2019-12-27 04:38:25,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:25,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:25,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297783162] [2019-12-27 04:38:25,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:25,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-27 04:38:25,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166778959] [2019-12-27 04:38:25,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-27 04:38:25,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:25,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-27 04:38:25,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 04:38:25,716 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-27 04:38:25,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:25,755 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-27 04:38:25,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 04:38:25,757 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-27 04:38:25,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:25,776 INFO L225 Difference]: With dead ends: 54 [2019-12-27 04:38:25,776 INFO L226 Difference]: Without dead ends: 36 [2019-12-27 04:38:25,778 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 [2019-12-27 04:38:25,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-27 04:38:25,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-27 04:38:25,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-27 04:38:25,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-27 04:38:25,831 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-27 04:38:25,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:25,832 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-27 04:38:25,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-27 04:38:25,836 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-27 04:38:25,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 04:38:25,837 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:25,838 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:25,846 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:25,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:25,846 INFO L82 PathProgramCache]: Analyzing trace with hash -179042095, now seen corresponding path program 1 times [2019-12-27 04:38:25,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:25,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430869207] [2019-12-27 04:38:25,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:25,943 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430869207] [2019-12-27 04:38:25,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:25,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 04:38:25,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79117830] [2019-12-27 04:38:25,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 04:38:25,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:25,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 04:38:25,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-27 04:38:25,948 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-27 04:38:25,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:25,991 INFO L93 Difference]: Finished difference Result 42 states and 90 transitions. [2019-12-27 04:38:25,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 04:38:25,992 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 04:38:25,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:25,993 INFO L225 Difference]: With dead ends: 42 [2019-12-27 04:38:25,993 INFO L226 Difference]: Without dead ends: 41 [2019-12-27 04:38:25,995 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 [2019-12-27 04:38:25,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-27 04:38:26,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-12-27 04:38:26,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-27 04:38:26,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 86 transitions. [2019-12-27 04:38:26,009 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 86 transitions. Word has length 7 [2019-12-27 04:38:26,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:26,010 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 86 transitions. [2019-12-27 04:38:26,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 04:38:26,010 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 86 transitions. [2019-12-27 04:38:26,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 04:38:26,011 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:26,011 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:26,011 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:26,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:26,012 INFO L82 PathProgramCache]: Analyzing trace with hash -179038096, now seen corresponding path program 1 times [2019-12-27 04:38:26,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:26,013 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247175141] [2019-12-27 04:38:26,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:26,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247175141] [2019-12-27 04:38:26,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:26,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 04:38:26,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265959971] [2019-12-27 04:38:26,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 04:38:26,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:26,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 04:38:26,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-27 04:38:26,111 INFO L87 Difference]: Start difference. First operand 39 states and 86 transitions. Second operand 4 states. [2019-12-27 04:38:26,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:26,135 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-27 04:38:26,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 04:38:26,136 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 04:38:26,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:26,137 INFO L225 Difference]: With dead ends: 51 [2019-12-27 04:38:26,137 INFO L226 Difference]: Without dead ends: 50 [2019-12-27 04:38:26,138 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 [2019-12-27 04:38:26,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-27 04:38:26,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-27 04:38:26,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-27 04:38:26,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-27 04:38:26,146 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-27 04:38:26,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:26,146 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-27 04:38:26,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 04:38:26,146 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-27 04:38:26,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 04:38:26,147 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:26,147 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:26,147 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:26,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:26,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1255337161, now seen corresponding path program 2 times [2019-12-27 04:38:26,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:26,148 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433267243] [2019-12-27 04:38:26,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:26,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:26,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433267243] [2019-12-27 04:38:26,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174260801] [2019-12-27 04:38:26,256 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 [2019-12-27 04:38:26,312 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:26,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:26,314 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 04:38:26,319 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:26,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:26,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:26,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 04:38:26,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065812099] [2019-12-27 04:38:26,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 04:38:26,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:26,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 04:38:26,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-27 04:38:26,376 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 8 states. [2019-12-27 04:38:26,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:26,444 INFO L93 Difference]: Finished difference Result 56 states and 118 transitions. [2019-12-27 04:38:26,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 04:38:26,445 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-27 04:38:26,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:26,446 INFO L225 Difference]: With dead ends: 56 [2019-12-27 04:38:26,446 INFO L226 Difference]: Without dead ends: 55 [2019-12-27 04:38:26,447 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 [2019-12-27 04:38:26,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-27 04:38:26,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2019-12-27 04:38:26,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-27 04:38:26,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 108 transitions. [2019-12-27 04:38:26,461 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 108 transitions. Word has length 8 [2019-12-27 04:38:26,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:26,462 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 108 transitions. [2019-12-27 04:38:26,462 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 04:38:26,463 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 108 transitions. [2019-12-27 04:38:26,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 04:38:26,464 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:26,464 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:26,668 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:26,668 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:26,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:26,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1255213037, now seen corresponding path program 2 times [2019-12-27 04:38:26,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:26,669 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383547147] [2019-12-27 04:38:26,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:26,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:26,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383547147] [2019-12-27 04:38:26,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4692730] [2019-12-27 04:38:26,744 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 [2019-12-27 04:38:26,791 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:26,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:26,792 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 04:38:26,793 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:26,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:26,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 04:38:26,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549378027] [2019-12-27 04:38:26,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 04:38:26,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:26,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 04:38:26,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-27 04:38:26,833 INFO L87 Difference]: Start difference. First operand 50 states and 108 transitions. Second operand 8 states. [2019-12-27 04:38:26,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:26,900 INFO L93 Difference]: Finished difference Result 63 states and 134 transitions. [2019-12-27 04:38:26,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 04:38:26,900 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-27 04:38:26,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:26,902 INFO L225 Difference]: With dead ends: 63 [2019-12-27 04:38:26,905 INFO L226 Difference]: Without dead ends: 62 [2019-12-27 04:38:26,905 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 [2019-12-27 04:38:26,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-27 04:38:26,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-12-27 04:38:26,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 04:38:26,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-27 04:38:26,917 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-27 04:38:26,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:26,917 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-27 04:38:26,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 04:38:26,917 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-27 04:38:26,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 04:38:26,918 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:26,918 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:27,119 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:27,119 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:27,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:27,120 INFO L82 PathProgramCache]: Analyzing trace with hash -260745839, now seen corresponding path program 3 times [2019-12-27 04:38:27,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:27,121 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134635541] [2019-12-27 04:38:27,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:27,227 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134635541] [2019-12-27 04:38:27,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133489908] [2019-12-27 04:38:27,228 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 [2019-12-27 04:38:27,284 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:27,285 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:27,285 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:27,287 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:27,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:27,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:27,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232333109] [2019-12-27 04:38:27,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:27,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:27,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:27,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:27,346 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 10 states. [2019-12-27 04:38:27,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:27,441 INFO L93 Difference]: Finished difference Result 66 states and 142 transitions. [2019-12-27 04:38:27,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 04:38:27,442 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-27 04:38:27,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:27,443 INFO L225 Difference]: With dead ends: 66 [2019-12-27 04:38:27,443 INFO L226 Difference]: Without dead ends: 65 [2019-12-27 04:38:27,447 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 [2019-12-27 04:38:27,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-27 04:38:27,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2019-12-27 04:38:27,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-27 04:38:27,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 130 transitions. [2019-12-27 04:38:27,456 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 130 transitions. Word has length 9 [2019-12-27 04:38:27,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:27,456 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 130 transitions. [2019-12-27 04:38:27,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:27,457 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 130 transitions. [2019-12-27 04:38:27,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 04:38:27,457 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:27,458 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:27,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:27,670 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:27,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:27,670 INFO L82 PathProgramCache]: Analyzing trace with hash -260744723, now seen corresponding path program 1 times [2019-12-27 04:38:27,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:27,671 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48796025] [2019-12-27 04:38:27,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:27,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:27,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48796025] [2019-12-27 04:38:27,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:27,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 04:38:27,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028422479] [2019-12-27 04:38:27,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 04:38:27,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:27,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 04:38:27,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-27 04:38:27,728 INFO L87 Difference]: Start difference. First operand 58 states and 130 transitions. Second operand 5 states. [2019-12-27 04:38:27,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:27,811 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-27 04:38:27,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 04:38:27,813 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 04:38:27,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:27,814 INFO L225 Difference]: With dead ends: 68 [2019-12-27 04:38:27,814 INFO L226 Difference]: Without dead ends: 67 [2019-12-27 04:38:27,815 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 [2019-12-27 04:38:27,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-27 04:38:27,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2019-12-27 04:38:27,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-27 04:38:27,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 131 transitions. [2019-12-27 04:38:27,829 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 131 transitions. Word has length 9 [2019-12-27 04:38:27,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:27,831 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 131 transitions. [2019-12-27 04:38:27,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 04:38:27,831 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 131 transitions. [2019-12-27 04:38:27,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 04:38:27,832 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:27,834 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:27,835 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:27,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:27,835 INFO L82 PathProgramCache]: Analyzing trace with hash -260711243, now seen corresponding path program 2 times [2019-12-27 04:38:27,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:27,836 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815816740] [2019-12-27 04:38:27,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:27,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815816740] [2019-12-27 04:38:27,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:27,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 04:38:27,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048759588] [2019-12-27 04:38:27,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 04:38:27,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:27,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 04:38:27,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-27 04:38:27,896 INFO L87 Difference]: Start difference. First operand 59 states and 131 transitions. Second operand 5 states. [2019-12-27 04:38:27,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:27,945 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-27 04:38:27,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 04:38:27,946 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 04:38:27,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:27,946 INFO L225 Difference]: With dead ends: 68 [2019-12-27 04:38:27,946 INFO L226 Difference]: Without dead ends: 67 [2019-12-27 04:38:27,947 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 [2019-12-27 04:38:27,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-27 04:38:27,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2019-12-27 04:38:27,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-27 04:38:27,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 134 transitions. [2019-12-27 04:38:27,952 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 134 transitions. Word has length 9 [2019-12-27 04:38:27,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:27,953 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 134 transitions. [2019-12-27 04:38:27,953 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 04:38:27,953 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 134 transitions. [2019-12-27 04:38:27,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 04:38:27,954 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:27,954 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:27,954 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:27,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:27,954 INFO L82 PathProgramCache]: Analyzing trace with hash -256897840, now seen corresponding path program 3 times [2019-12-27 04:38:27,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:27,955 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336478496] [2019-12-27 04:38:27,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:28,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:28,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336478496] [2019-12-27 04:38:28,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206968290] [2019-12-27 04:38:28,026 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 [2019-12-27 04:38:28,073 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:28,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:28,074 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:28,075 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:28,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:28,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:28,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:28,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158037502] [2019-12-27 04:38:28,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:28,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:28,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:28,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:28,134 INFO L87 Difference]: Start difference. First operand 62 states and 134 transitions. Second operand 10 states. [2019-12-27 04:38:28,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:28,239 INFO L93 Difference]: Finished difference Result 77 states and 162 transitions. [2019-12-27 04:38:28,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 04:38:28,241 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-27 04:38:28,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:28,242 INFO L225 Difference]: With dead ends: 77 [2019-12-27 04:38:28,242 INFO L226 Difference]: Without dead ends: 76 [2019-12-27 04:38:28,242 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 [2019-12-27 04:38:28,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-27 04:38:28,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2019-12-27 04:38:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-27 04:38:28,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-27 04:38:28,252 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-27 04:38:28,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:28,252 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-27 04:38:28,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:28,253 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-27 04:38:28,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:28,254 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:28,254 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:28,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:28,462 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:28,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:28,463 INFO L82 PathProgramCache]: Analyzing trace with hash 506814071, now seen corresponding path program 4 times [2019-12-27 04:38:28,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:28,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608701520] [2019-12-27 04:38:28,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:28,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:28,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608701520] [2019-12-27 04:38:28,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831119274] [2019-12-27 04:38:28,544 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 [2019-12-27 04:38:28,590 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:28,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:28,591 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:28,592 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:28,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:28,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:28,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462470692] [2019-12-27 04:38:28,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:28,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:28,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:28,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:28,710 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 12 states. [2019-12-27 04:38:28,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:28,811 INFO L93 Difference]: Finished difference Result 80 states and 170 transitions. [2019-12-27 04:38:28,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 04:38:28,812 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-27 04:38:28,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:28,813 INFO L225 Difference]: With dead ends: 80 [2019-12-27 04:38:28,813 INFO L226 Difference]: Without dead ends: 79 [2019-12-27 04:38:28,814 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 [2019-12-27 04:38:28,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-27 04:38:28,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2019-12-27 04:38:28,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-27 04:38:28,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-27 04:38:28,819 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-27 04:38:28,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:28,820 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-27 04:38:28,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:28,820 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-27 04:38:28,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:28,821 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:28,821 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:29,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:29,026 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:29,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:29,026 INFO L82 PathProgramCache]: Analyzing trace with hash 506815187, now seen corresponding path program 3 times [2019-12-27 04:38:29,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:29,027 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289120012] [2019-12-27 04:38:29,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:29,088 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289120012] [2019-12-27 04:38:29,088 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080561946] [2019-12-27 04:38:29,088 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 [2019-12-27 04:38:29,138 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:29,138 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:29,147 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:29,148 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:29,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:29,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:29,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520893504] [2019-12-27 04:38:29,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:29,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:29,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:29,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:29,218 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-27 04:38:29,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:29,287 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-27 04:38:29,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 04:38:29,287 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 04:38:29,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:29,289 INFO L225 Difference]: With dead ends: 88 [2019-12-27 04:38:29,289 INFO L226 Difference]: Without dead ends: 87 [2019-12-27 04:38:29,289 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 [2019-12-27 04:38:29,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-27 04:38:29,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2019-12-27 04:38:29,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-27 04:38:29,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-27 04:38:29,295 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-27 04:38:29,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:29,296 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-27 04:38:29,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:29,296 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-27 04:38:29,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:29,297 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:29,297 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:29,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:29,502 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:29,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:29,503 INFO L82 PathProgramCache]: Analyzing trace with hash 506848822, now seen corresponding path program 4 times [2019-12-27 04:38:29,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:29,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741662740] [2019-12-27 04:38:29,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:29,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:29,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741662740] [2019-12-27 04:38:29,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153551687] [2019-12-27 04:38:29,554 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 [2019-12-27 04:38:29,610 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:29,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:29,611 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:29,611 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:29,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:29,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:29,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:29,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010990422] [2019-12-27 04:38:29,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:29,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:29,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:29,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:29,666 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-27 04:38:29,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:29,755 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-27 04:38:29,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 04:38:29,755 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 04:38:29,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:29,756 INFO L225 Difference]: With dead ends: 88 [2019-12-27 04:38:29,756 INFO L226 Difference]: Without dead ends: 87 [2019-12-27 04:38:29,757 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 [2019-12-27 04:38:29,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-27 04:38:29,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2019-12-27 04:38:29,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-27 04:38:29,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-27 04:38:29,762 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-27 04:38:29,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:29,763 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-27 04:38:29,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:29,763 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-27 04:38:29,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:29,764 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:29,764 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:29,967 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:29,968 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:29,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:29,968 INFO L82 PathProgramCache]: Analyzing trace with hash 506848667, now seen corresponding path program 5 times [2019-12-27 04:38:29,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:29,969 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426596485] [2019-12-27 04:38:29,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:29,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:30,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:30,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426596485] [2019-12-27 04:38:30,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121767677] [2019-12-27 04:38:30,040 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 [2019-12-27 04:38:30,088 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:30,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:30,089 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:30,090 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:30,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:30,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:30,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951329487] [2019-12-27 04:38:30,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:30,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:30,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:30,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:30,164 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 10 states. [2019-12-27 04:38:30,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:30,264 INFO L93 Difference]: Finished difference Result 94 states and 194 transitions. [2019-12-27 04:38:30,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 04:38:30,265 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 04:38:30,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:30,266 INFO L225 Difference]: With dead ends: 94 [2019-12-27 04:38:30,266 INFO L226 Difference]: Without dead ends: 92 [2019-12-27 04:38:30,266 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 [2019-12-27 04:38:30,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-12-27 04:38:30,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2019-12-27 04:38:30,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-27 04:38:30,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-27 04:38:30,270 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-27 04:38:30,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:30,271 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-27 04:38:30,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:30,271 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-27 04:38:30,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:30,272 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:30,272 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:30,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:30,480 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:30,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:30,481 INFO L82 PathProgramCache]: Analyzing trace with hash 507886702, now seen corresponding path program 6 times [2019-12-27 04:38:30,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:30,482 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977235884] [2019-12-27 04:38:30,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:30,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977235884] [2019-12-27 04:38:30,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669152486] [2019-12-27 04:38:30,545 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 [2019-12-27 04:38:30,593 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 04:38:30,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:30,594 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:30,600 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:30,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:30,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:30,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167286130] [2019-12-27 04:38:30,683 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:30,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:30,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:30,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:30,684 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 10 states. [2019-12-27 04:38:30,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:30,813 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-27 04:38:30,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 04:38:30,814 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 04:38:30,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:30,815 INFO L225 Difference]: With dead ends: 88 [2019-12-27 04:38:30,816 INFO L226 Difference]: Without dead ends: 87 [2019-12-27 04:38:30,816 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 [2019-12-27 04:38:30,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-27 04:38:30,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2019-12-27 04:38:30,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-27 04:38:30,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-27 04:38:30,830 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-27 04:38:30,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:30,831 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-27 04:38:30,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:30,831 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-27 04:38:30,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:30,833 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:30,833 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:31,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:31,041 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:31,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:31,041 INFO L82 PathProgramCache]: Analyzing trace with hash 626102195, now seen corresponding path program 4 times [2019-12-27 04:38:31,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:31,041 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815260161] [2019-12-27 04:38:31,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:31,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815260161] [2019-12-27 04:38:31,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309293076] [2019-12-27 04:38:31,124 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 [2019-12-27 04:38:31,178 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:31,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:31,179 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:31,180 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:31,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:31,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:31,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97103589] [2019-12-27 04:38:31,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:31,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:31,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:31,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:31,274 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 12 states. [2019-12-27 04:38:31,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:31,368 INFO L93 Difference]: Finished difference Result 92 states and 194 transitions. [2019-12-27 04:38:31,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 04:38:31,368 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-27 04:38:31,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:31,369 INFO L225 Difference]: With dead ends: 92 [2019-12-27 04:38:31,369 INFO L226 Difference]: Without dead ends: 91 [2019-12-27 04:38:31,370 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 [2019-12-27 04:38:31,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-27 04:38:31,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2019-12-27 04:38:31,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-27 04:38:31,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-27 04:38:31,374 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-27 04:38:31,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:31,374 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-27 04:38:31,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:31,375 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-27 04:38:31,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:31,375 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:31,375 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:31,576 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:31,577 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:31,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:31,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1468632495, now seen corresponding path program 5 times [2019-12-27 04:38:31,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:31,578 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450506971] [2019-12-27 04:38:31,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:31,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450506971] [2019-12-27 04:38:31,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966769495] [2019-12-27 04:38:31,659 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 [2019-12-27 04:38:31,712 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:38:31,712 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:31,713 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:31,714 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:31,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:31,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:31,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31523917] [2019-12-27 04:38:31,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:31,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:31,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:31,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:31,808 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 14 states. [2019-12-27 04:38:31,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:31,937 INFO L93 Difference]: Finished difference Result 95 states and 202 transitions. [2019-12-27 04:38:31,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 04:38:31,937 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-27 04:38:31,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:31,938 INFO L225 Difference]: With dead ends: 95 [2019-12-27 04:38:31,939 INFO L226 Difference]: Without dead ends: 94 [2019-12-27 04:38:31,939 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 [2019-12-27 04:38:31,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-27 04:38:31,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2019-12-27 04:38:31,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 04:38:31,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 04:38:31,943 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 04:38:31,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:31,943 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 04:38:31,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:31,944 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 04:38:31,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:31,944 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:31,944 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:32,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:32,148 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:32,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:32,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1468631379, now seen corresponding path program 7 times [2019-12-27 04:38:32,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:32,149 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49684805] [2019-12-27 04:38:32,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:32,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49684805] [2019-12-27 04:38:32,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071491221] [2019-12-27 04:38:32,231 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 [2019-12-27 04:38:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:32,272 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:32,273 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:32,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:32,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:32,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893008769] [2019-12-27 04:38:32,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:32,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:32,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:32,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:32,354 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-27 04:38:32,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:32,512 INFO L93 Difference]: Finished difference Result 104 states and 220 transitions. [2019-12-27 04:38:32,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 04:38:32,512 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:32,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:32,514 INFO L225 Difference]: With dead ends: 104 [2019-12-27 04:38:32,514 INFO L226 Difference]: Without dead ends: 103 [2019-12-27 04:38:32,515 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 [2019-12-27 04:38:32,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-12-27 04:38:32,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2019-12-27 04:38:32,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 04:38:32,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 04:38:32,519 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 04:38:32,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:32,519 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 04:38:32,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:32,519 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 04:38:32,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:32,520 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:32,520 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:32,723 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:32,723 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:32,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:32,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597744, now seen corresponding path program 8 times [2019-12-27 04:38:32,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:32,724 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838846192] [2019-12-27 04:38:32,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:32,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838846192] [2019-12-27 04:38:32,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478308901] [2019-12-27 04:38:32,783 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 [2019-12-27 04:38:32,829 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:32,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:32,830 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:32,831 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:32,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:32,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:32,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119158789] [2019-12-27 04:38:32,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:32,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:32,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:32,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:32,919 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-27 04:38:33,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:33,060 INFO L93 Difference]: Finished difference Result 110 states and 230 transitions. [2019-12-27 04:38:33,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 04:38:33,060 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:33,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:33,061 INFO L225 Difference]: With dead ends: 110 [2019-12-27 04:38:33,061 INFO L226 Difference]: Without dead ends: 108 [2019-12-27 04:38:33,062 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 [2019-12-27 04:38:33,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-27 04:38:33,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 84. [2019-12-27 04:38:33,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 04:38:33,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-27 04:38:33,067 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-27 04:38:33,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:33,067 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-27 04:38:33,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:33,067 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-27 04:38:33,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:33,068 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:33,068 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:33,274 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:33,275 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:33,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:33,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597899, now seen corresponding path program 9 times [2019-12-27 04:38:33,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:33,276 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334585171] [2019-12-27 04:38:33,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:33,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334585171] [2019-12-27 04:38:33,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395299896] [2019-12-27 04:38:33,343 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 [2019-12-27 04:38:33,391 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:33,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:33,392 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:33,397 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:33,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:33,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:33,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12028431] [2019-12-27 04:38:33,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:33,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:33,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:33,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:33,519 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-27 04:38:33,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:33,707 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-27 04:38:33,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 04:38:33,707 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:33,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:33,708 INFO L225 Difference]: With dead ends: 107 [2019-12-27 04:38:33,708 INFO L226 Difference]: Without dead ends: 106 [2019-12-27 04:38:33,709 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2019-12-27 04:38:33,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-27 04:38:33,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2019-12-27 04:38:33,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 04:38:33,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-27 04:38:33,713 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-27 04:38:33,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:33,713 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-27 04:38:33,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:33,713 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-27 04:38:33,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:33,714 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:33,714 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:33,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:33,917 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:33,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:33,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555214, now seen corresponding path program 10 times [2019-12-27 04:38:33,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:33,918 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252293041] [2019-12-27 04:38:33,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:33,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252293041] [2019-12-27 04:38:33,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136043398] [2019-12-27 04:38:33,997 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 [2019-12-27 04:38:34,040 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:34,040 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:34,041 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:34,042 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:34,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:34,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:34,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371233371] [2019-12-27 04:38:34,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:34,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:34,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:34,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:34,108 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-27 04:38:34,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:34,304 INFO L93 Difference]: Finished difference Result 117 states and 243 transitions. [2019-12-27 04:38:34,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 04:38:34,311 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:34,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:34,312 INFO L225 Difference]: With dead ends: 117 [2019-12-27 04:38:34,312 INFO L226 Difference]: Without dead ends: 115 [2019-12-27 04:38:34,313 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 [2019-12-27 04:38:34,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-27 04:38:34,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 83. [2019-12-27 04:38:34,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 04:38:34,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 183 transitions. [2019-12-27 04:38:34,316 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 183 transitions. Word has length 11 [2019-12-27 04:38:34,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:34,317 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 183 transitions. [2019-12-27 04:38:34,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:34,317 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 183 transitions. [2019-12-27 04:38:34,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:34,317 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:34,318 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:34,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:34,521 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:34,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:34,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1467559864, now seen corresponding path program 11 times [2019-12-27 04:38:34,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:34,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792044361] [2019-12-27 04:38:34,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:34,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792044361] [2019-12-27 04:38:34,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469115392] [2019-12-27 04:38:34,607 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 [2019-12-27 04:38:34,653 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:34,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:34,654 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:34,655 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:34,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:34,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:34,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63165176] [2019-12-27 04:38:34,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:34,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:34,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:34,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:34,737 INFO L87 Difference]: Start difference. First operand 83 states and 183 transitions. Second operand 12 states. [2019-12-27 04:38:34,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:34,921 INFO L93 Difference]: Finished difference Result 121 states and 250 transitions. [2019-12-27 04:38:34,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 04:38:34,921 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:34,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:34,922 INFO L225 Difference]: With dead ends: 121 [2019-12-27 04:38:34,922 INFO L226 Difference]: Without dead ends: 119 [2019-12-27 04:38:34,923 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 [2019-12-27 04:38:34,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-27 04:38:34,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 85. [2019-12-27 04:38:34,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 04:38:34,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 04:38:34,927 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 04:38:34,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:34,927 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 04:38:34,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:34,927 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 04:38:34,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:34,928 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:34,928 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:35,131 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:35,131 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:35,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:35,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1467560019, now seen corresponding path program 12 times [2019-12-27 04:38:35,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:35,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385131926] [2019-12-27 04:38:35,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:35,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:35,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385131926] [2019-12-27 04:38:35,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127333491] [2019-12-27 04:38:35,194 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 [2019-12-27 04:38:35,245 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 04:38:35,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:35,245 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:35,246 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:35,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:35,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:35,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735837396] [2019-12-27 04:38:35,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:35,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:35,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:35,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:35,304 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-27 04:38:35,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:35,486 INFO L93 Difference]: Finished difference Result 117 states and 243 transitions. [2019-12-27 04:38:35,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:35,487 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:35,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:35,488 INFO L225 Difference]: With dead ends: 117 [2019-12-27 04:38:35,488 INFO L226 Difference]: Without dead ends: 115 [2019-12-27 04:38:35,488 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 [2019-12-27 04:38:35,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-27 04:38:35,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 88. [2019-12-27 04:38:35,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 04:38:35,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 194 transitions. [2019-12-27 04:38:35,492 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 194 transitions. Word has length 11 [2019-12-27 04:38:35,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:35,493 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 194 transitions. [2019-12-27 04:38:35,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:35,493 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 194 transitions. [2019-12-27 04:38:35,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:35,493 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:35,493 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:35,694 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:35,694 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:35,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:35,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380934, now seen corresponding path program 13 times [2019-12-27 04:38:35,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:35,695 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485834451] [2019-12-27 04:38:35,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:35,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:35,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485834451] [2019-12-27 04:38:35,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87059837] [2019-12-27 04:38:35,764 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 [2019-12-27 04:38:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:35,809 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:35,810 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:35,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:35,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:35,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148972094] [2019-12-27 04:38:35,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:35,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:35,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:35,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:35,875 INFO L87 Difference]: Start difference. First operand 88 states and 194 transitions. Second operand 12 states. [2019-12-27 04:38:36,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:36,043 INFO L93 Difference]: Finished difference Result 108 states and 224 transitions. [2019-12-27 04:38:36,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 04:38:36,046 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:36,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:36,047 INFO L225 Difference]: With dead ends: 108 [2019-12-27 04:38:36,047 INFO L226 Difference]: Without dead ends: 107 [2019-12-27 04:38:36,047 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 [2019-12-27 04:38:36,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-12-27 04:38:36,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 86. [2019-12-27 04:38:36,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-27 04:38:36,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-27 04:38:36,051 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-27 04:38:36,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:36,052 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-27 04:38:36,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:36,052 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-27 04:38:36,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:36,052 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:36,052 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:36,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:36,256 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:36,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:36,257 INFO L82 PathProgramCache]: Analyzing trace with hash -2065667792, now seen corresponding path program 5 times [2019-12-27 04:38:36,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:36,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878531544] [2019-12-27 04:38:36,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:36,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878531544] [2019-12-27 04:38:36,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135680277] [2019-12-27 04:38:36,320 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 [2019-12-27 04:38:36,382 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:38:36,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:36,383 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:36,384 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:36,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:36,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:36,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158335842] [2019-12-27 04:38:36,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:36,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:36,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:36,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:36,470 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 14 states. [2019-12-27 04:38:36,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:36,602 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-27 04:38:36,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 04:38:36,603 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-27 04:38:36,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:36,604 INFO L225 Difference]: With dead ends: 107 [2019-12-27 04:38:36,604 INFO L226 Difference]: Without dead ends: 106 [2019-12-27 04:38:36,605 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 [2019-12-27 04:38:36,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-27 04:38:36,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2019-12-27 04:38:36,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-27 04:38:36,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-27 04:38:36,609 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-27 04:38:36,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:36,610 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-27 04:38:36,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:36,610 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-27 04:38:36,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:36,610 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:36,611 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:36,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:36,814 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:36,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:36,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1717033399, now seen corresponding path program 6 times [2019-12-27 04:38:36,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:36,815 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210661777] [2019-12-27 04:38:36,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:36,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210661777] [2019-12-27 04:38:36,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234384002] [2019-12-27 04:38:36,912 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 [2019-12-27 04:38:36,972 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 04:38:36,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:36,973 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 04:38:36,978 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:37,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 04:38:37,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 15 [2019-12-27 04:38:37,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675829757] [2019-12-27 04:38:37,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 04:38:37,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:37,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 04:38:37,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2019-12-27 04:38:37,092 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 8 states. [2019-12-27 04:38:37,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:37,127 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2019-12-27 04:38:37,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 04:38:37,128 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 04:38:37,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:37,129 INFO L225 Difference]: With dead ends: 124 [2019-12-27 04:38:37,130 INFO L226 Difference]: Without dead ends: 115 [2019-12-27 04:38:37,132 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 [2019-12-27 04:38:37,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-27 04:38:37,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2019-12-27 04:38:37,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 04:38:37,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 274 transitions. [2019-12-27 04:38:37,139 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 274 transitions. Word has length 12 [2019-12-27 04:38:37,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:37,139 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 274 transitions. [2019-12-27 04:38:37,139 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 04:38:37,139 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 274 transitions. [2019-12-27 04:38:37,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:37,140 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:37,140 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:37,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:37,346 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:37,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:37,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1717034515, now seen corresponding path program 14 times [2019-12-27 04:38:37,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:37,347 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408213797] [2019-12-27 04:38:37,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:37,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408213797] [2019-12-27 04:38:37,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861624792] [2019-12-27 04:38:37,423 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 [2019-12-27 04:38:37,466 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:37,467 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:37,467 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:37,468 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:37,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:37,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:37,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111033297] [2019-12-27 04:38:37,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:37,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:37,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:37,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:37,564 INFO L87 Difference]: Start difference. First operand 115 states and 274 transitions. Second operand 14 states. [2019-12-27 04:38:37,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:37,806 INFO L93 Difference]: Finished difference Result 137 states and 312 transitions. [2019-12-27 04:38:37,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 04:38:37,812 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:37,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:37,813 INFO L225 Difference]: With dead ends: 137 [2019-12-27 04:38:37,813 INFO L226 Difference]: Without dead ends: 136 [2019-12-27 04:38:37,814 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 [2019-12-27 04:38:37,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-12-27 04:38:37,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2019-12-27 04:38:37,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 04:38:37,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 279 transitions. [2019-12-27 04:38:37,819 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 279 transitions. Word has length 12 [2019-12-27 04:38:37,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:37,819 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 279 transitions. [2019-12-27 04:38:37,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:37,820 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 279 transitions. [2019-12-27 04:38:37,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:37,821 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:37,821 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:38,024 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:38,024 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:38,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:38,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1717068150, now seen corresponding path program 15 times [2019-12-27 04:38:38,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:38,026 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876432659] [2019-12-27 04:38:38,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:38,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876432659] [2019-12-27 04:38:38,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530673188] [2019-12-27 04:38:38,096 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 [2019-12-27 04:38:38,141 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:38,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:38,142 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:38,143 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:38,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:38,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:38,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943634296] [2019-12-27 04:38:38,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:38,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:38,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:38,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:38,255 INFO L87 Difference]: Start difference. First operand 117 states and 279 transitions. Second operand 14 states. [2019-12-27 04:38:38,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:38,543 INFO L93 Difference]: Finished difference Result 147 states and 334 transitions. [2019-12-27 04:38:38,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:38,543 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:38,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:38,544 INFO L225 Difference]: With dead ends: 147 [2019-12-27 04:38:38,544 INFO L226 Difference]: Without dead ends: 146 [2019-12-27 04:38:38,545 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2019-12-27 04:38:38,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-27 04:38:38,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 118. [2019-12-27 04:38:38,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-12-27 04:38:38,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 283 transitions. [2019-12-27 04:38:38,550 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 283 transitions. Word has length 12 [2019-12-27 04:38:38,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:38,550 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 283 transitions. [2019-12-27 04:38:38,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:38,550 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 283 transitions. [2019-12-27 04:38:38,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:38,551 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:38,551 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:38,751 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:38,752 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:38,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:38,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1717067995, now seen corresponding path program 16 times [2019-12-27 04:38:38,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:38,753 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396590394] [2019-12-27 04:38:38,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:38,834 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396590394] [2019-12-27 04:38:38,834 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324969583] [2019-12-27 04:38:38,834 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 [2019-12-27 04:38:38,916 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:38,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:38,918 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:38,919 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:39,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:39,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:39,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979483128] [2019-12-27 04:38:39,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:39,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:39,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:39,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:39,521 INFO L87 Difference]: Start difference. First operand 118 states and 283 transitions. Second operand 14 states. [2019-12-27 04:38:39,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:39,947 INFO L93 Difference]: Finished difference Result 150 states and 340 transitions. [2019-12-27 04:38:39,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:39,947 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:39,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:39,949 INFO L225 Difference]: With dead ends: 150 [2019-12-27 04:38:39,949 INFO L226 Difference]: Without dead ends: 149 [2019-12-27 04:38:39,949 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=317, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:39,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-27 04:38:39,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 119. [2019-12-27 04:38:39,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-27 04:38:39,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 284 transitions. [2019-12-27 04:38:39,954 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 284 transitions. Word has length 12 [2019-12-27 04:38:39,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:39,954 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 284 transitions. [2019-12-27 04:38:39,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:39,954 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 284 transitions. [2019-12-27 04:38:39,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:39,955 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:39,955 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:40,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:40,158 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:40,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:40,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110835, now seen corresponding path program 17 times [2019-12-27 04:38:40,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:40,159 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142143186] [2019-12-27 04:38:40,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:40,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142143186] [2019-12-27 04:38:40,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647878801] [2019-12-27 04:38:40,256 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:40,324 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:40,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:40,326 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:40,330 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:40,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:40,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:40,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305569240] [2019-12-27 04:38:40,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:40,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:40,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:40,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:40,491 INFO L87 Difference]: Start difference. First operand 119 states and 284 transitions. Second operand 14 states. [2019-12-27 04:38:40,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:40,809 INFO L93 Difference]: Finished difference Result 151 states and 339 transitions. [2019-12-27 04:38:40,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 04:38:40,810 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:40,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:40,811 INFO L225 Difference]: With dead ends: 151 [2019-12-27 04:38:40,811 INFO L226 Difference]: Without dead ends: 149 [2019-12-27 04:38:40,812 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:40,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-27 04:38:40,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 125. [2019-12-27 04:38:40,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 04:38:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 305 transitions. [2019-12-27 04:38:40,819 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 305 transitions. Word has length 12 [2019-12-27 04:38:40,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:40,820 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 305 transitions. [2019-12-27 04:38:40,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:40,821 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 305 transitions. [2019-12-27 04:38:40,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:40,822 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:40,822 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:41,026 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:41,026 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:41,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:41,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110680, now seen corresponding path program 18 times [2019-12-27 04:38:41,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:41,026 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111427901] [2019-12-27 04:38:41,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:41,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111427901] [2019-12-27 04:38:41,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111468750] [2019-12-27 04:38:41,096 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 [2019-12-27 04:38:41,140 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:38:41,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:41,140 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:41,142 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:41,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:41,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:41,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:41,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650493884] [2019-12-27 04:38:41,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:41,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:41,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:41,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:41,256 INFO L87 Difference]: Start difference. First operand 125 states and 305 transitions. Second operand 14 states. [2019-12-27 04:38:41,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:41,528 INFO L93 Difference]: Finished difference Result 166 states and 375 transitions. [2019-12-27 04:38:41,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:41,528 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:41,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:41,529 INFO L225 Difference]: With dead ends: 166 [2019-12-27 04:38:41,529 INFO L226 Difference]: Without dead ends: 164 [2019-12-27 04:38:41,530 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 [2019-12-27 04:38:41,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-12-27 04:38:41,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 123. [2019-12-27 04:38:41,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-12-27 04:38:41,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 297 transitions. [2019-12-27 04:38:41,534 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 297 transitions. Word has length 12 [2019-12-27 04:38:41,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:41,534 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 297 transitions. [2019-12-27 04:38:41,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:41,534 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 297 transitions. [2019-12-27 04:38:41,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:41,535 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:41,535 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:41,735 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:41,736 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:41,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:41,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1718106030, now seen corresponding path program 19 times [2019-12-27 04:38:41,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:41,737 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291126924] [2019-12-27 04:38:41,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:41,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291126924] [2019-12-27 04:38:41,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636599635] [2019-12-27 04:38:41,802 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 [2019-12-27 04:38:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:41,864 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:41,864 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:41,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:41,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:41,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923714205] [2019-12-27 04:38:41,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:41,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:41,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:41,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:41,992 INFO L87 Difference]: Start difference. First operand 123 states and 297 transitions. Second operand 14 states. [2019-12-27 04:38:42,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:42,249 INFO L93 Difference]: Finished difference Result 162 states and 367 transitions. [2019-12-27 04:38:42,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:42,250 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:42,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:42,251 INFO L225 Difference]: With dead ends: 162 [2019-12-27 04:38:42,251 INFO L226 Difference]: Without dead ends: 161 [2019-12-27 04:38:42,251 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 [2019-12-27 04:38:42,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-27 04:38:42,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 124. [2019-12-27 04:38:42,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 04:38:42,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 301 transitions. [2019-12-27 04:38:42,256 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 301 transitions. Word has length 12 [2019-12-27 04:38:42,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:42,256 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 301 transitions. [2019-12-27 04:38:42,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:42,256 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 301 transitions. [2019-12-27 04:38:42,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:42,257 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:42,257 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:42,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:42,460 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:42,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:42,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1718105875, now seen corresponding path program 20 times [2019-12-27 04:38:42,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:42,461 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372239794] [2019-12-27 04:38:42,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:42,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372239794] [2019-12-27 04:38:42,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899259220] [2019-12-27 04:38:42,531 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 [2019-12-27 04:38:42,574 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:42,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:42,575 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:42,576 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:42,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:42,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:42,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887527693] [2019-12-27 04:38:42,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:42,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:42,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:42,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:42,696 INFO L87 Difference]: Start difference. First operand 124 states and 301 transitions. Second operand 14 states. [2019-12-27 04:38:42,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:42,937 INFO L93 Difference]: Finished difference Result 153 states and 352 transitions. [2019-12-27 04:38:42,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:42,938 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:42,940 INFO L225 Difference]: With dead ends: 153 [2019-12-27 04:38:42,940 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 04:38:42,940 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 [2019-12-27 04:38:42,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 04:38:42,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 124. [2019-12-27 04:38:42,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 04:38:42,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 298 transitions. [2019-12-27 04:38:42,944 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 298 transitions. Word has length 12 [2019-12-27 04:38:42,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:42,945 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 298 transitions. [2019-12-27 04:38:42,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:42,945 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 298 transitions. [2019-12-27 04:38:42,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:42,945 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:42,945 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:43,148 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:43,148 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:43,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:43,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429265, now seen corresponding path program 21 times [2019-12-27 04:38:43,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:43,149 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861925902] [2019-12-27 04:38:43,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:43,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861925902] [2019-12-27 04:38:43,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502804366] [2019-12-27 04:38:43,211 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 [2019-12-27 04:38:43,255 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:38:43,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:43,256 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:43,257 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:43,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:43,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:43,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140128003] [2019-12-27 04:38:43,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:43,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:43,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:43,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:43,382 INFO L87 Difference]: Start difference. First operand 124 states and 298 transitions. Second operand 14 states. [2019-12-27 04:38:43,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:43,709 INFO L93 Difference]: Finished difference Result 173 states and 385 transitions. [2019-12-27 04:38:43,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 04:38:43,709 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:43,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:43,711 INFO L225 Difference]: With dead ends: 173 [2019-12-27 04:38:43,711 INFO L226 Difference]: Without dead ends: 171 [2019-12-27 04:38:43,712 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=350, Unknown=0, NotChecked=0, Total=506 [2019-12-27 04:38:43,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-27 04:38:43,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 126. [2019-12-27 04:38:43,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 04:38:43,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 306 transitions. [2019-12-27 04:38:43,716 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 306 transitions. Word has length 12 [2019-12-27 04:38:43,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:43,717 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 306 transitions. [2019-12-27 04:38:43,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:43,717 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 306 transitions. [2019-12-27 04:38:43,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:43,717 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:43,717 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:43,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:43,921 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:43,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:43,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429110, now seen corresponding path program 22 times [2019-12-27 04:38:43,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:43,922 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529452173] [2019-12-27 04:38:43,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:44,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529452173] [2019-12-27 04:38:44,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304541099] [2019-12-27 04:38:44,013 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 [2019-12-27 04:38:44,079 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:44,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:44,081 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:44,082 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:44,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:44,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:44,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995618125] [2019-12-27 04:38:44,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:44,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:44,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:44,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:44,274 INFO L87 Difference]: Start difference. First operand 126 states and 306 transitions. Second operand 14 states. [2019-12-27 04:38:44,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:44,640 INFO L93 Difference]: Finished difference Result 171 states and 391 transitions. [2019-12-27 04:38:44,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:38:44,640 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:44,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:44,641 INFO L225 Difference]: With dead ends: 171 [2019-12-27 04:38:44,641 INFO L226 Difference]: Without dead ends: 169 [2019-12-27 04:38:44,642 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2019-12-27 04:38:44,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-12-27 04:38:44,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 124. [2019-12-27 04:38:44,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 04:38:44,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 307 transitions. [2019-12-27 04:38:44,647 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 307 transitions. Word has length 12 [2019-12-27 04:38:44,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:44,647 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 307 transitions. [2019-12-27 04:38:44,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:44,647 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 307 transitions. [2019-12-27 04:38:44,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:44,648 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:44,648 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:44,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:44,852 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:44,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:44,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1750285115, now seen corresponding path program 23 times [2019-12-27 04:38:44,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:44,853 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983818580] [2019-12-27 04:38:44,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:44,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:44,928 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983818580] [2019-12-27 04:38:44,928 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846519969] [2019-12-27 04:38:44,928 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 [2019-12-27 04:38:44,969 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:44,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:44,970 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:44,970 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:45,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:45,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:45,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625078654] [2019-12-27 04:38:45,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:45,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:45,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:45,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:45,057 INFO L87 Difference]: Start difference. First operand 124 states and 307 transitions. Second operand 14 states. [2019-12-27 04:38:45,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:45,295 INFO L93 Difference]: Finished difference Result 187 states and 421 transitions. [2019-12-27 04:38:45,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:38:45,295 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:45,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:45,297 INFO L225 Difference]: With dead ends: 187 [2019-12-27 04:38:45,297 INFO L226 Difference]: Without dead ends: 185 [2019-12-27 04:38:45,298 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2019-12-27 04:38:45,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-12-27 04:38:45,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 129. [2019-12-27 04:38:45,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-27 04:38:45,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 327 transitions. [2019-12-27 04:38:45,302 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 327 transitions. Word has length 12 [2019-12-27 04:38:45,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:45,303 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 327 transitions. [2019-12-27 04:38:45,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:45,303 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 327 transitions. [2019-12-27 04:38:45,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:45,303 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:45,304 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:45,506 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:45,507 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:45,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:45,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1750284960, now seen corresponding path program 24 times [2019-12-27 04:38:45,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:45,508 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080253676] [2019-12-27 04:38:45,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:45,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:45,577 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080253676] [2019-12-27 04:38:45,577 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888336928] [2019-12-27 04:38:45,577 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 [2019-12-27 04:38:45,621 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:38:45,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:45,622 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:45,623 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:45,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:45,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:45,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:45,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435166512] [2019-12-27 04:38:45,707 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:45,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:45,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:45,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:45,707 INFO L87 Difference]: Start difference. First operand 129 states and 327 transitions. Second operand 14 states. [2019-12-27 04:38:45,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:45,917 INFO L93 Difference]: Finished difference Result 180 states and 414 transitions. [2019-12-27 04:38:45,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 04:38:45,919 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:45,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:45,920 INFO L225 Difference]: With dead ends: 180 [2019-12-27 04:38:45,920 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 04:38:45,921 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 [2019-12-27 04:38:45,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 04:38:45,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 126. [2019-12-27 04:38:45,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 04:38:45,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 315 transitions. [2019-12-27 04:38:45,925 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 315 transitions. Word has length 12 [2019-12-27 04:38:45,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:45,925 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 315 transitions. [2019-12-27 04:38:45,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:45,926 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 315 transitions. [2019-12-27 04:38:45,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:45,926 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:45,926 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:46,129 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:46,130 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:46,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:46,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1750280310, now seen corresponding path program 25 times [2019-12-27 04:38:46,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:46,130 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426053291] [2019-12-27 04:38:46,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:46,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426053291] [2019-12-27 04:38:46,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586895893] [2019-12-27 04:38:46,206 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:46,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:46,249 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:46,250 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:46,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:46,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:46,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794517967] [2019-12-27 04:38:46,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:46,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:46,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:46,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:46,399 INFO L87 Difference]: Start difference. First operand 126 states and 315 transitions. Second operand 14 states. [2019-12-27 04:38:46,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:46,797 INFO L93 Difference]: Finished difference Result 174 states and 399 transitions. [2019-12-27 04:38:46,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:38:46,797 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:46,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:46,799 INFO L225 Difference]: With dead ends: 174 [2019-12-27 04:38:46,799 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 04:38:46,800 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2019-12-27 04:38:46,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 04:38:46,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 125. [2019-12-27 04:38:46,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 04:38:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 311 transitions. [2019-12-27 04:38:46,807 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 311 transitions. Word has length 12 [2019-12-27 04:38:46,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:46,807 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 311 transitions. [2019-12-27 04:38:46,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:46,807 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 311 transitions. [2019-12-27 04:38:46,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:46,808 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:46,809 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:47,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:47,014 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:47,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:47,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1542513096, now seen corresponding path program 26 times [2019-12-27 04:38:47,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:47,016 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170700332] [2019-12-27 04:38:47,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:47,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170700332] [2019-12-27 04:38:47,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288876120] [2019-12-27 04:38:47,086 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 [2019-12-27 04:38:47,130 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:47,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:47,131 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:47,131 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:47,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:47,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:47,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114597858] [2019-12-27 04:38:47,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:47,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:47,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:47,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:47,219 INFO L87 Difference]: Start difference. First operand 125 states and 311 transitions. Second operand 14 states. [2019-12-27 04:38:47,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:47,445 INFO L93 Difference]: Finished difference Result 154 states and 353 transitions. [2019-12-27 04:38:47,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 04:38:47,445 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:47,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:47,447 INFO L225 Difference]: With dead ends: 154 [2019-12-27 04:38:47,447 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 04:38:47,448 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:47,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 04:38:47,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2019-12-27 04:38:47,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-27 04:38:47,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2019-12-27 04:38:47,452 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2019-12-27 04:38:47,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:47,452 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2019-12-27 04:38:47,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:47,452 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2019-12-27 04:38:47,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:47,453 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:47,453 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:47,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:47,656 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:47,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:47,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135351, now seen corresponding path program 27 times [2019-12-27 04:38:47,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:47,657 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061559660] [2019-12-27 04:38:47,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:47,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061559660] [2019-12-27 04:38:47,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606605686] [2019-12-27 04:38:47,726 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 [2019-12-27 04:38:47,773 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:38:47,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:47,774 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:47,775 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:47,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:47,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:47,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:47,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622265997] [2019-12-27 04:38:47,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:47,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:47,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:47,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:47,869 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 14 states. [2019-12-27 04:38:48,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:48,081 INFO L93 Difference]: Finished difference Result 174 states and 394 transitions. [2019-12-27 04:38:48,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 04:38:48,082 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:48,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:48,084 INFO L225 Difference]: With dead ends: 174 [2019-12-27 04:38:48,084 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 04:38:48,085 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 [2019-12-27 04:38:48,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 04:38:48,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 127. [2019-12-27 04:38:48,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 04:38:48,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 307 transitions. [2019-12-27 04:38:48,089 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 307 transitions. Word has length 12 [2019-12-27 04:38:48,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:48,089 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 307 transitions. [2019-12-27 04:38:48,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:48,089 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 307 transitions. [2019-12-27 04:38:48,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:48,090 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:48,090 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:48,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:48,294 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:48,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:48,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1547284461, now seen corresponding path program 28 times [2019-12-27 04:38:48,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:48,295 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553304911] [2019-12-27 04:38:48,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:48,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553304911] [2019-12-27 04:38:48,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322552958] [2019-12-27 04:38:48,355 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 [2019-12-27 04:38:48,397 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:48,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:48,397 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:48,398 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:48,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:48,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:48,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794772362] [2019-12-27 04:38:48,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:48,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:48,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:48,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:48,492 INFO L87 Difference]: Start difference. First operand 127 states and 307 transitions. Second operand 14 states. [2019-12-27 04:38:48,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:48,712 INFO L93 Difference]: Finished difference Result 146 states and 330 transitions. [2019-12-27 04:38:48,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 04:38:48,714 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:48,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:48,715 INFO L225 Difference]: With dead ends: 146 [2019-12-27 04:38:48,715 INFO L226 Difference]: Without dead ends: 145 [2019-12-27 04:38:48,716 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 [2019-12-27 04:38:48,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-12-27 04:38:48,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 128. [2019-12-27 04:38:48,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-27 04:38:48,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 299 transitions. [2019-12-27 04:38:48,721 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 299 transitions. Word has length 12 [2019-12-27 04:38:48,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:48,721 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 299 transitions. [2019-12-27 04:38:48,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:48,721 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 299 transitions. [2019-12-27 04:38:48,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:48,722 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:48,722 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:48,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:48,926 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:48,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:48,926 INFO L82 PathProgramCache]: Analyzing trace with hash 388808531, now seen corresponding path program 6 times [2019-12-27 04:38:48,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:48,926 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115044120] [2019-12-27 04:38:48,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:49,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115044120] [2019-12-27 04:38:49,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239331152] [2019-12-27 04:38:49,010 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 [2019-12-27 04:38:49,052 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 04:38:49,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:49,053 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 04:38:49,054 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:49,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 04:38:49,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 15 [2019-12-27 04:38:49,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797557132] [2019-12-27 04:38:49,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 04:38:49,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:49,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 04:38:49,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2019-12-27 04:38:49,115 INFO L87 Difference]: Start difference. First operand 128 states and 299 transitions. Second operand 8 states. [2019-12-27 04:38:49,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:49,136 INFO L93 Difference]: Finished difference Result 159 states and 367 transitions. [2019-12-27 04:38:49,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 04:38:49,137 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 04:38:49,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:49,138 INFO L225 Difference]: With dead ends: 159 [2019-12-27 04:38:49,139 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 04:38:49,139 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 [2019-12-27 04:38:49,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 04:38:49,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2019-12-27 04:38:49,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 04:38:49,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 354 transitions. [2019-12-27 04:38:49,144 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 354 transitions. Word has length 12 [2019-12-27 04:38:49,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:49,144 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 354 transitions. [2019-12-27 04:38:49,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 04:38:49,144 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 354 transitions. [2019-12-27 04:38:49,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:49,145 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:49,145 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:49,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:49,348 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:49,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:49,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1688429421, now seen corresponding path program 29 times [2019-12-27 04:38:49,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:49,349 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774666314] [2019-12-27 04:38:49,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:49,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774666314] [2019-12-27 04:38:49,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887974811] [2019-12-27 04:38:49,433 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 [2019-12-27 04:38:49,475 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:38:49,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:49,476 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:49,477 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:49,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:49,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:49,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181331489] [2019-12-27 04:38:49,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:49,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:49,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:49,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:49,582 INFO L87 Difference]: Start difference. First operand 152 states and 354 transitions. Second operand 16 states. [2019-12-27 04:38:49,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:49,887 INFO L93 Difference]: Finished difference Result 177 states and 402 transitions. [2019-12-27 04:38:49,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:49,888 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:49,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:49,890 INFO L225 Difference]: With dead ends: 177 [2019-12-27 04:38:49,890 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 04:38:49,891 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2019-12-27 04:38:49,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 04:38:49,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 151. [2019-12-27 04:38:49,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 04:38:49,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 354 transitions. [2019-12-27 04:38:49,895 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 354 transitions. Word has length 13 [2019-12-27 04:38:49,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:49,896 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 354 transitions. [2019-12-27 04:38:49,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:49,896 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 354 transitions. [2019-12-27 04:38:49,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:49,896 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:49,897 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:50,099 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:50,100 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:50,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:50,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1688463056, now seen corresponding path program 30 times [2019-12-27 04:38:50,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:50,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191077955] [2019-12-27 04:38:50,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:50,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191077955] [2019-12-27 04:38:50,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540425091] [2019-12-27 04:38:50,182 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 [2019-12-27 04:38:50,226 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:38:50,226 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:50,227 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:50,228 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:50,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:50,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:50,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781670969] [2019-12-27 04:38:50,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:50,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:50,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:50,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:50,357 INFO L87 Difference]: Start difference. First operand 151 states and 354 transitions. Second operand 16 states. [2019-12-27 04:38:50,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:50,726 INFO L93 Difference]: Finished difference Result 187 states and 424 transitions. [2019-12-27 04:38:50,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 04:38:50,727 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:50,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:50,728 INFO L225 Difference]: With dead ends: 187 [2019-12-27 04:38:50,728 INFO L226 Difference]: Without dead ends: 186 [2019-12-27 04:38:50,729 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 [2019-12-27 04:38:50,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-27 04:38:50,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 153. [2019-12-27 04:38:50,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 04:38:50,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 362 transitions. [2019-12-27 04:38:50,734 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 362 transitions. Word has length 13 [2019-12-27 04:38:50,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:50,736 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 362 transitions. [2019-12-27 04:38:50,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:50,736 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 362 transitions. [2019-12-27 04:38:50,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:50,737 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:50,737 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:50,938 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:50,938 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:50,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:50,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1688462901, now seen corresponding path program 31 times [2019-12-27 04:38:50,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:50,938 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009703668] [2019-12-27 04:38:50,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:51,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009703668] [2019-12-27 04:38:51,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683424387] [2019-12-27 04:38:51,015 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 [2019-12-27 04:38:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:51,056 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:51,057 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:51,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:51,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:51,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563109914] [2019-12-27 04:38:51,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:51,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:51,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:51,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:51,310 INFO L87 Difference]: Start difference. First operand 153 states and 362 transitions. Second operand 16 states. [2019-12-27 04:38:53,553 WARN L192 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-12-27 04:38:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:53,641 INFO L93 Difference]: Finished difference Result 190 states and 428 transitions. [2019-12-27 04:38:53,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:38:53,642 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:53,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:53,643 INFO L225 Difference]: With dead ends: 190 [2019-12-27 04:38:53,643 INFO L226 Difference]: Without dead ends: 187 [2019-12-27 04:38:53,644 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=258, Invalid=553, Unknown=1, NotChecked=0, Total=812 [2019-12-27 04:38:53,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-12-27 04:38:53,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 153. [2019-12-27 04:38:53,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 04:38:53,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 361 transitions. [2019-12-27 04:38:53,648 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 361 transitions. Word has length 13 [2019-12-27 04:38:53,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:53,648 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 361 transitions. [2019-12-27 04:38:53,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:53,648 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 361 transitions. [2019-12-27 04:38:53,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:53,649 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:53,649 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:53,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:53,853 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:53,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:53,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505741, now seen corresponding path program 32 times [2019-12-27 04:38:53,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:53,854 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051073484] [2019-12-27 04:38:53,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:53,969 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051073484] [2019-12-27 04:38:53,969 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133817461] [2019-12-27 04:38:53,969 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 [2019-12-27 04:38:54,044 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:54,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:54,045 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:54,046 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:54,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:54,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:54,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:54,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090525410] [2019-12-27 04:38:54,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:54,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:54,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:54,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:54,234 INFO L87 Difference]: Start difference. First operand 153 states and 361 transitions. Second operand 16 states. [2019-12-27 04:38:54,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:54,670 INFO L93 Difference]: Finished difference Result 196 states and 445 transitions. [2019-12-27 04:38:54,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:38:54,670 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:54,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:54,672 INFO L225 Difference]: With dead ends: 196 [2019-12-27 04:38:54,672 INFO L226 Difference]: Without dead ends: 194 [2019-12-27 04:38:54,672 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2019-12-27 04:38:54,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-12-27 04:38:54,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 160. [2019-12-27 04:38:54,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-12-27 04:38:54,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 389 transitions. [2019-12-27 04:38:54,677 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 389 transitions. Word has length 13 [2019-12-27 04:38:54,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:54,677 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 389 transitions. [2019-12-27 04:38:54,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:54,677 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 389 transitions. [2019-12-27 04:38:54,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:54,678 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:54,678 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:54,881 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:54,881 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:54,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:54,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505586, now seen corresponding path program 33 times [2019-12-27 04:38:54,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:54,882 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157019569] [2019-12-27 04:38:54,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:54,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157019569] [2019-12-27 04:38:54,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393937463] [2019-12-27 04:38:54,964 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 [2019-12-27 04:38:55,034 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:38:55,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:55,036 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:55,037 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:55,821 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_122 Int)) (and (<= (div (+ (* v_~j~0_122 (- 1)) 1) (- 3)) 1) (<= c_~j~0 (+ c_~i~0 v_~j~0_122)) (<= c_~i~0 (+ (* 2 v_~j~0_122) 1)))) is different from true [2019-12-27 04:38:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:55,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:55,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:55,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296179895] [2019-12-27 04:38:55,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:55,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:55,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:55,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=157, Unknown=1, NotChecked=26, Total=240 [2019-12-27 04:38:55,824 INFO L87 Difference]: Start difference. First operand 160 states and 389 transitions. Second operand 16 states. [2019-12-27 04:38:58,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:58,360 INFO L93 Difference]: Finished difference Result 220 states and 496 transitions. [2019-12-27 04:38:58,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:38:58,361 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:58,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:58,362 INFO L225 Difference]: With dead ends: 220 [2019-12-27 04:38:58,363 INFO L226 Difference]: Without dead ends: 219 [2019-12-27 04:38:58,363 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=274, Invalid=598, Unknown=2, NotChecked=56, Total=930 [2019-12-27 04:38:58,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-12-27 04:38:58,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 160. [2019-12-27 04:38:58,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-12-27 04:38:58,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 389 transitions. [2019-12-27 04:38:58,368 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 389 transitions. Word has length 13 [2019-12-27 04:38:58,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:58,369 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 389 transitions. [2019-12-27 04:38:58,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:58,369 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 389 transitions. [2019-12-27 04:38:58,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:58,370 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:58,370 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:58,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:58,573 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:58,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:58,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500936, now seen corresponding path program 34 times [2019-12-27 04:38:58,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:58,575 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307098289] [2019-12-27 04:38:58,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:58,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:58,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307098289] [2019-12-27 04:38:58,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578545779] [2019-12-27 04:38:58,667 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 [2019-12-27 04:38:58,712 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:58,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:58,713 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:58,714 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:00,724 WARN L192 SmtUtils]: Spent 512.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 04:39:00,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:00,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:00,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:00,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184154395] [2019-12-27 04:39:00,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:00,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:00,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:00,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=177, Unknown=2, NotChecked=0, Total=240 [2019-12-27 04:39:00,726 INFO L87 Difference]: Start difference. First operand 160 states and 389 transitions. Second operand 16 states. [2019-12-27 04:39:01,262 WARN L192 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-27 04:39:01,928 WARN L192 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2019-12-27 04:39:02,502 WARN L192 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-12-27 04:39:03,086 WARN L192 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-27 04:39:03,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:03,111 INFO L93 Difference]: Finished difference Result 213 states and 483 transitions. [2019-12-27 04:39:03,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:39:03,111 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:03,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:03,113 INFO L225 Difference]: With dead ends: 213 [2019-12-27 04:39:03,113 INFO L226 Difference]: Without dead ends: 212 [2019-12-27 04:39:03,114 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=196, Invalid=452, Unknown=2, NotChecked=0, Total=650 [2019-12-27 04:39:03,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-12-27 04:39:03,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 161. [2019-12-27 04:39:03,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-27 04:39:03,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 393 transitions. [2019-12-27 04:39:03,119 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 393 transitions. Word has length 13 [2019-12-27 04:39:03,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:03,119 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 393 transitions. [2019-12-27 04:39:03,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:03,120 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 393 transitions. [2019-12-27 04:39:03,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:03,120 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:03,120 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:03,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:03,324 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:03,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:03,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500781, now seen corresponding path program 35 times [2019-12-27 04:39:03,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:03,325 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482000110] [2019-12-27 04:39:03,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:03,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482000110] [2019-12-27 04:39:03,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875759571] [2019-12-27 04:39:03,430 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 [2019-12-27 04:39:03,473 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:39:03,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:03,474 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:03,475 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:05,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:05,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:05,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300489267] [2019-12-27 04:39:05,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:05,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:05,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:05,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=176, Unknown=2, NotChecked=0, Total=240 [2019-12-27 04:39:05,532 INFO L87 Difference]: Start difference. First operand 161 states and 393 transitions. Second operand 16 states. [2019-12-27 04:39:06,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:06,146 INFO L93 Difference]: Finished difference Result 205 states and 469 transitions. [2019-12-27 04:39:06,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:06,147 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:06,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:06,149 INFO L225 Difference]: With dead ends: 205 [2019-12-27 04:39:06,149 INFO L226 Difference]: Without dead ends: 201 [2019-12-27 04:39:06,149 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=235, Invalid=519, Unknown=2, NotChecked=0, Total=756 [2019-12-27 04:39:06,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-12-27 04:39:06,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 160. [2019-12-27 04:39:06,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-12-27 04:39:06,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 388 transitions. [2019-12-27 04:39:06,155 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 388 transitions. Word has length 13 [2019-12-27 04:39:06,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:06,155 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 388 transitions. [2019-12-27 04:39:06,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:06,155 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 388 transitions. [2019-12-27 04:39:06,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:06,156 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:06,156 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:06,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:06,359 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:06,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:06,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828821, now seen corresponding path program 36 times [2019-12-27 04:39:06,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:06,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717341928] [2019-12-27 04:39:06,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:06,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:06,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717341928] [2019-12-27 04:39:06,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888573783] [2019-12-27 04:39:06,443 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 [2019-12-27 04:39:06,486 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:39:06,486 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:06,487 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:06,487 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:06,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:06,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:06,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:06,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846239383] [2019-12-27 04:39:06,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:06,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:06,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:06,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:06,615 INFO L87 Difference]: Start difference. First operand 160 states and 388 transitions. Second operand 16 states. [2019-12-27 04:39:07,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:07,090 INFO L93 Difference]: Finished difference Result 231 states and 523 transitions. [2019-12-27 04:39:07,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:39:07,090 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:07,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:07,092 INFO L225 Difference]: With dead ends: 231 [2019-12-27 04:39:07,092 INFO L226 Difference]: Without dead ends: 229 [2019-12-27 04:39:07,093 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 [2019-12-27 04:39:07,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-12-27 04:39:07,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 164. [2019-12-27 04:39:07,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-12-27 04:39:07,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2019-12-27 04:39:07,098 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 13 [2019-12-27 04:39:07,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:07,098 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2019-12-27 04:39:07,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:07,098 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2019-12-27 04:39:07,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:07,099 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:07,099 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:07,302 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:07,302 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:07,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:07,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824171, now seen corresponding path program 37 times [2019-12-27 04:39:07,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:07,303 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838848602] [2019-12-27 04:39:07,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:07,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838848602] [2019-12-27 04:39:07,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984924529] [2019-12-27 04:39:07,376 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 [2019-12-27 04:39:07,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:07,420 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:07,420 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:07,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:07,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:07,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:07,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647303519] [2019-12-27 04:39:07,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:07,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:07,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:07,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:07,577 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 16 states. [2019-12-27 04:39:08,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:08,169 INFO L93 Difference]: Finished difference Result 240 states and 544 transitions. [2019-12-27 04:39:08,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:39:08,169 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:08,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:08,171 INFO L225 Difference]: With dead ends: 240 [2019-12-27 04:39:08,172 INFO L226 Difference]: Without dead ends: 238 [2019-12-27 04:39:08,172 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2019-12-27 04:39:08,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-12-27 04:39:08,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 166. [2019-12-27 04:39:08,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-12-27 04:39:08,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 412 transitions. [2019-12-27 04:39:08,177 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 412 transitions. Word has length 13 [2019-12-27 04:39:08,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:08,177 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 412 transitions. [2019-12-27 04:39:08,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:08,177 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 412 transitions. [2019-12-27 04:39:08,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:08,178 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:08,178 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:08,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:08,381 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:08,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:08,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824016, now seen corresponding path program 38 times [2019-12-27 04:39:08,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:08,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031945052] [2019-12-27 04:39:08,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:08,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031945052] [2019-12-27 04:39:08,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908942179] [2019-12-27 04:39:08,472 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 [2019-12-27 04:39:08,518 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:39:08,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:08,519 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:08,520 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:09,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:09,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:09,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:09,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149669542] [2019-12-27 04:39:09,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:09,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:09,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:09,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=180, Unknown=1, NotChecked=0, Total=240 [2019-12-27 04:39:09,119 INFO L87 Difference]: Start difference. First operand 166 states and 412 transitions. Second operand 16 states. [2019-12-27 04:39:09,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:09,625 INFO L93 Difference]: Finished difference Result 237 states and 538 transitions. [2019-12-27 04:39:09,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 04:39:09,629 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:09,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:09,630 INFO L225 Difference]: With dead ends: 237 [2019-12-27 04:39:09,631 INFO L226 Difference]: Without dead ends: 231 [2019-12-27 04:39:09,631 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=224, Invalid=531, Unknown=1, NotChecked=0, Total=756 [2019-12-27 04:39:09,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-12-27 04:39:09,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 168. [2019-12-27 04:39:09,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-12-27 04:39:09,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 417 transitions. [2019-12-27 04:39:09,637 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 417 transitions. Word has length 13 [2019-12-27 04:39:09,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:09,637 INFO L462 AbstractCegarLoop]: Abstraction has 168 states and 417 transitions. [2019-12-27 04:39:09,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:09,638 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 417 transitions. [2019-12-27 04:39:09,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:09,639 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:09,639 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:09,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:09,842 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:09,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:09,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1721680021, now seen corresponding path program 39 times [2019-12-27 04:39:09,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:09,843 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910096814] [2019-12-27 04:39:09,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:09,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910096814] [2019-12-27 04:39:09,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384308654] [2019-12-27 04:39:09,935 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 [2019-12-27 04:39:09,980 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:39:09,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:09,981 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:09,982 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:10,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:10,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:10,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033818465] [2019-12-27 04:39:10,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:10,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:10,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:10,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:10,173 INFO L87 Difference]: Start difference. First operand 168 states and 417 transitions. Second operand 16 states. [2019-12-27 04:39:10,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:10,630 INFO L93 Difference]: Finished difference Result 228 states and 528 transitions. [2019-12-27 04:39:10,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:10,631 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:10,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:10,632 INFO L225 Difference]: With dead ends: 228 [2019-12-27 04:39:10,633 INFO L226 Difference]: Without dead ends: 227 [2019-12-27 04:39:10,633 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 [2019-12-27 04:39:10,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-27 04:39:10,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 169. [2019-12-27 04:39:10,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-12-27 04:39:10,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 421 transitions. [2019-12-27 04:39:10,638 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 421 transitions. Word has length 13 [2019-12-27 04:39:10,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:10,639 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 421 transitions. [2019-12-27 04:39:10,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:10,639 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 421 transitions. [2019-12-27 04:39:10,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:10,640 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:10,640 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:10,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:10,843 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:10,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:10,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1721679866, now seen corresponding path program 40 times [2019-12-27 04:39:10,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:10,844 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536068476] [2019-12-27 04:39:10,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:10,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:10,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536068476] [2019-12-27 04:39:10,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977579265] [2019-12-27 04:39:10,923 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 [2019-12-27 04:39:10,968 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:39:10,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:10,969 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:10,969 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:11,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:11,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:11,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399184854] [2019-12-27 04:39:11,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:11,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:11,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:11,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:11,140 INFO L87 Difference]: Start difference. First operand 169 states and 421 transitions. Second operand 16 states. [2019-12-27 04:39:11,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:11,547 INFO L93 Difference]: Finished difference Result 233 states and 540 transitions. [2019-12-27 04:39:11,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:39:11,548 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:11,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:11,550 INFO L225 Difference]: With dead ends: 233 [2019-12-27 04:39:11,550 INFO L226 Difference]: Without dead ends: 232 [2019-12-27 04:39:11,550 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2019-12-27 04:39:11,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2019-12-27 04:39:11,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2019-12-27 04:39:11,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-12-27 04:39:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 417 transitions. [2019-12-27 04:39:11,555 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 417 transitions. Word has length 13 [2019-12-27 04:39:11,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:11,555 INFO L462 AbstractCegarLoop]: Abstraction has 168 states and 417 transitions. [2019-12-27 04:39:11,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:11,556 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 417 transitions. [2019-12-27 04:39:11,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:11,556 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:11,556 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:11,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:11,760 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:11,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:11,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1721675216, now seen corresponding path program 41 times [2019-12-27 04:39:11,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:11,761 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726948217] [2019-12-27 04:39:11,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:11,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726948217] [2019-12-27 04:39:11,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935263735] [2019-12-27 04:39:11,840 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 [2019-12-27 04:39:11,881 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:39:11,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:11,882 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:11,882 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:18,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:18,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:18,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:18,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813053741] [2019-12-27 04:39:18,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:18,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:18,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:18,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=177, Unknown=2, NotChecked=0, Total=240 [2019-12-27 04:39:18,174 INFO L87 Difference]: Start difference. First operand 168 states and 417 transitions. Second operand 16 states. [2019-12-27 04:39:18,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:18,718 INFO L93 Difference]: Finished difference Result 222 states and 514 transitions. [2019-12-27 04:39:18,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:39:18,718 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:18,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:18,720 INFO L225 Difference]: With dead ends: 222 [2019-12-27 04:39:18,721 INFO L226 Difference]: Without dead ends: 221 [2019-12-27 04:39:18,721 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=178, Invalid=420, Unknown=2, NotChecked=0, Total=600 [2019-12-27 04:39:18,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-27 04:39:18,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 166. [2019-12-27 04:39:18,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-12-27 04:39:18,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2019-12-27 04:39:18,728 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 13 [2019-12-27 04:39:18,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:18,728 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2019-12-27 04:39:18,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:18,728 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2019-12-27 04:39:18,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:18,737 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:18,737 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:18,938 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:18,938 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:18,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:18,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118035, now seen corresponding path program 42 times [2019-12-27 04:39:18,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:18,939 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205066662] [2019-12-27 04:39:18,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:18,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:19,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205066662] [2019-12-27 04:39:19,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534846654] [2019-12-27 04:39:19,021 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 [2019-12-27 04:39:19,068 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:39:19,068 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:19,069 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:19,069 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:19,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:19,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:19,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961739904] [2019-12-27 04:39:19,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:19,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:19,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:19,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:19,190 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 16 states. [2019-12-27 04:39:19,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:19,493 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2019-12-27 04:39:19,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:39:19,494 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:19,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:19,495 INFO L225 Difference]: With dead ends: 180 [2019-12-27 04:39:19,496 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 04:39:19,496 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 [2019-12-27 04:39:19,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 04:39:19,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 167. [2019-12-27 04:39:19,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-12-27 04:39:19,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 407 transitions. [2019-12-27 04:39:19,500 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 407 transitions. Word has length 13 [2019-12-27 04:39:19,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:19,501 INFO L462 AbstractCegarLoop]: Abstraction has 167 states and 407 transitions. [2019-12-27 04:39:19,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:19,501 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 407 transitions. [2019-12-27 04:39:19,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:19,502 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:19,502 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:19,705 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:19,706 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:19,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:19,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1571266990, now seen corresponding path program 43 times [2019-12-27 04:39:19,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:19,707 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142590393] [2019-12-27 04:39:19,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:19,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:19,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142590393] [2019-12-27 04:39:19,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068756691] [2019-12-27 04:39:19,796 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 [2019-12-27 04:39:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:19,839 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:19,840 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:20,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:20,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:20,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969689095] [2019-12-27 04:39:20,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:20,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:20,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:20,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:20,037 INFO L87 Difference]: Start difference. First operand 167 states and 407 transitions. Second operand 16 states. [2019-12-27 04:39:20,570 WARN L192 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-27 04:39:21,753 WARN L192 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2019-12-27 04:39:22,129 WARN L192 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-27 04:39:22,334 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-27 04:39:22,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:22,369 INFO L93 Difference]: Finished difference Result 231 states and 527 transitions. [2019-12-27 04:39:22,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:39:22,370 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:22,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:22,372 INFO L225 Difference]: With dead ends: 231 [2019-12-27 04:39:22,372 INFO L226 Difference]: Without dead ends: 226 [2019-12-27 04:39:22,373 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=276, Invalid=653, Unknown=1, NotChecked=0, Total=930 [2019-12-27 04:39:22,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-27 04:39:22,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 170. [2019-12-27 04:39:22,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-12-27 04:39:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 417 transitions. [2019-12-27 04:39:22,378 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 417 transitions. Word has length 13 [2019-12-27 04:39:22,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:22,378 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 417 transitions. [2019-12-27 04:39:22,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:22,378 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 417 transitions. [2019-12-27 04:39:22,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:22,379 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:22,379 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:22,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:22,582 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:22,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:22,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1571267145, now seen corresponding path program 44 times [2019-12-27 04:39:22,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:22,583 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319072378] [2019-12-27 04:39:22,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:22,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:22,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319072378] [2019-12-27 04:39:22,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199227640] [2019-12-27 04:39:22,692 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 [2019-12-27 04:39:22,760 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:39:22,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:22,762 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:22,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:23,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:23,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:23,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301028630] [2019-12-27 04:39:23,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:23,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:23,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:23,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:23,060 INFO L87 Difference]: Start difference. First operand 170 states and 417 transitions. Second operand 16 states. [2019-12-27 04:39:25,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:25,235 INFO L93 Difference]: Finished difference Result 256 states and 585 transitions. [2019-12-27 04:39:25,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:39:25,235 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:25,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:25,237 INFO L225 Difference]: With dead ends: 256 [2019-12-27 04:39:25,238 INFO L226 Difference]: Without dead ends: 254 [2019-12-27 04:39:25,238 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2019-12-27 04:39:25,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2019-12-27 04:39:25,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 173. [2019-12-27 04:39:25,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-12-27 04:39:25,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 430 transitions. [2019-12-27 04:39:25,243 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 430 transitions. Word has length 13 [2019-12-27 04:39:25,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:25,243 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 430 transitions. [2019-12-27 04:39:25,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:25,243 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 430 transitions. [2019-12-27 04:39:25,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:25,244 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:25,244 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:25,444 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:25,444 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:25,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:25,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1571271795, now seen corresponding path program 45 times [2019-12-27 04:39:25,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:25,446 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136000729] [2019-12-27 04:39:25,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:25,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136000729] [2019-12-27 04:39:25,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009490736] [2019-12-27 04:39:25,526 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 [2019-12-27 04:39:25,574 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:39:25,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:25,575 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:25,576 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:25,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:25,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:25,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4608250] [2019-12-27 04:39:25,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:25,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:25,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:25,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:25,793 INFO L87 Difference]: Start difference. First operand 173 states and 430 transitions. Second operand 16 states. [2019-12-27 04:39:27,212 WARN L192 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-27 04:39:27,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:27,488 INFO L93 Difference]: Finished difference Result 257 states and 583 transitions. [2019-12-27 04:39:27,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:39:27,488 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:27,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:27,490 INFO L225 Difference]: With dead ends: 257 [2019-12-27 04:39:27,491 INFO L226 Difference]: Without dead ends: 255 [2019-12-27 04:39:27,491 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=266, Invalid=603, Unknown=1, NotChecked=0, Total=870 [2019-12-27 04:39:27,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2019-12-27 04:39:27,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 175. [2019-12-27 04:39:27,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-12-27 04:39:27,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 438 transitions. [2019-12-27 04:39:27,495 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 438 transitions. Word has length 13 [2019-12-27 04:39:27,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:27,495 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 438 transitions. [2019-12-27 04:39:27,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:27,496 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 438 transitions. [2019-12-27 04:39:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:27,496 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:27,496 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:27,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:27,700 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:27,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:27,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735640, now seen corresponding path program 46 times [2019-12-27 04:39:27,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:27,701 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724872776] [2019-12-27 04:39:27,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:27,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:27,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724872776] [2019-12-27 04:39:27,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802306640] [2019-12-27 04:39:27,802 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 [2019-12-27 04:39:27,847 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:39:27,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:27,848 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:27,849 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:27,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:27,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:27,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538030667] [2019-12-27 04:39:27,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:27,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:27,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:27,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:27,969 INFO L87 Difference]: Start difference. First operand 175 states and 438 transitions. Second operand 16 states. [2019-12-27 04:39:28,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:28,411 INFO L93 Difference]: Finished difference Result 241 states and 556 transitions. [2019-12-27 04:39:28,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:39:28,411 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:28,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:28,413 INFO L225 Difference]: With dead ends: 241 [2019-12-27 04:39:28,413 INFO L226 Difference]: Without dead ends: 231 [2019-12-27 04:39:28,414 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=287, Invalid=705, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:39:28,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-12-27 04:39:28,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 177. [2019-12-27 04:39:28,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-12-27 04:39:28,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 441 transitions. [2019-12-27 04:39:28,419 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 441 transitions. Word has length 13 [2019-12-27 04:39:28,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:28,419 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 441 transitions. [2019-12-27 04:39:28,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:28,419 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 441 transitions. [2019-12-27 04:39:28,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:28,420 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:28,420 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:28,623 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:28,624 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:28,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:28,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735795, now seen corresponding path program 47 times [2019-12-27 04:39:28,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:28,625 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232831863] [2019-12-27 04:39:28,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:28,724 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232831863] [2019-12-27 04:39:28,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007115690] [2019-12-27 04:39:28,725 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 [2019-12-27 04:39:28,764 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:39:28,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:28,766 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:28,767 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:28,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:28,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:28,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556207095] [2019-12-27 04:39:28,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:28,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:28,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:28,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:28,874 INFO L87 Difference]: Start difference. First operand 177 states and 441 transitions. Second operand 16 states. [2019-12-27 04:39:29,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:29,287 INFO L93 Difference]: Finished difference Result 259 states and 592 transitions. [2019-12-27 04:39:29,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:39:29,288 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:29,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:29,290 INFO L225 Difference]: With dead ends: 259 [2019-12-27 04:39:29,290 INFO L226 Difference]: Without dead ends: 257 [2019-12-27 04:39:29,290 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 [2019-12-27 04:39:29,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2019-12-27 04:39:29,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 176. [2019-12-27 04:39:29,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-12-27 04:39:29,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 438 transitions. [2019-12-27 04:39:29,294 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 438 transitions. Word has length 13 [2019-12-27 04:39:29,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:29,294 INFO L462 AbstractCegarLoop]: Abstraction has 176 states and 438 transitions. [2019-12-27 04:39:29,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:29,294 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 438 transitions. [2019-12-27 04:39:29,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:29,295 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:29,295 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:29,498 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:29,498 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:29,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:29,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740445, now seen corresponding path program 48 times [2019-12-27 04:39:29,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:29,499 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459265279] [2019-12-27 04:39:29,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:29,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:29,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459265279] [2019-12-27 04:39:29,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056830493] [2019-12-27 04:39:29,592 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 [2019-12-27 04:39:29,642 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:39:29,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:29,643 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:29,644 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:29,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:29,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:29,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003706336] [2019-12-27 04:39:29,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:29,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:29,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:29,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:29,759 INFO L87 Difference]: Start difference. First operand 176 states and 438 transitions. Second operand 16 states. [2019-12-27 04:39:30,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:30,109 INFO L93 Difference]: Finished difference Result 258 states and 586 transitions. [2019-12-27 04:39:30,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:30,110 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:30,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:30,111 INFO L225 Difference]: With dead ends: 258 [2019-12-27 04:39:30,111 INFO L226 Difference]: Without dead ends: 256 [2019-12-27 04:39:30,112 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 [2019-12-27 04:39:30,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-12-27 04:39:30,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 175. [2019-12-27 04:39:30,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-12-27 04:39:30,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 435 transitions. [2019-12-27 04:39:30,116 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 435 transitions. Word has length 13 [2019-12-27 04:39:30,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:30,117 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 435 transitions. [2019-12-27 04:39:30,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:30,117 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 435 transitions. [2019-12-27 04:39:30,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:30,117 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:30,117 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:30,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:30,318 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:30,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:30,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740600, now seen corresponding path program 49 times [2019-12-27 04:39:30,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:30,319 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936172734] [2019-12-27 04:39:30,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:30,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:30,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936172734] [2019-12-27 04:39:30,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655200054] [2019-12-27 04:39:30,404 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 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 [2019-12-27 04:39:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:30,450 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:30,450 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:30,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:30,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:30,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738788468] [2019-12-27 04:39:30,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:30,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:30,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:30,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:30,555 INFO L87 Difference]: Start difference. First operand 175 states and 435 transitions. Second operand 16 states. [2019-12-27 04:39:30,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:30,956 INFO L93 Difference]: Finished difference Result 249 states and 567 transitions. [2019-12-27 04:39:30,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:39:30,956 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:30,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:30,958 INFO L225 Difference]: With dead ends: 249 [2019-12-27 04:39:30,959 INFO L226 Difference]: Without dead ends: 242 [2019-12-27 04:39:30,959 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 [2019-12-27 04:39:30,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-12-27 04:39:30,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 173. [2019-12-27 04:39:30,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-12-27 04:39:30,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 424 transitions. [2019-12-27 04:39:30,963 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 424 transitions. Word has length 13 [2019-12-27 04:39:30,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:30,963 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 424 transitions. [2019-12-27 04:39:30,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:30,963 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 424 transitions. [2019-12-27 04:39:30,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:30,964 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:30,964 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:31,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:31,168 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:31,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:31,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1575884595, now seen corresponding path program 50 times [2019-12-27 04:39:31,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:31,169 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325358966] [2019-12-27 04:39:31,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:31,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325358966] [2019-12-27 04:39:31,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460631274] [2019-12-27 04:39:31,244 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 [2019-12-27 04:39:31,292 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:39:31,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:31,293 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:31,294 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:31,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:31,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:31,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:31,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166176672] [2019-12-27 04:39:31,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:31,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:31,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:31,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:31,404 INFO L87 Difference]: Start difference. First operand 173 states and 424 transitions. Second operand 16 states. [2019-12-27 04:39:31,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:31,876 INFO L93 Difference]: Finished difference Result 240 states and 545 transitions. [2019-12-27 04:39:31,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:39:31,876 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:31,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:31,878 INFO L225 Difference]: With dead ends: 240 [2019-12-27 04:39:31,878 INFO L226 Difference]: Without dead ends: 238 [2019-12-27 04:39:31,879 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 [2019-12-27 04:39:31,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-12-27 04:39:31,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 169. [2019-12-27 04:39:31,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-12-27 04:39:31,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 410 transitions. [2019-12-27 04:39:31,883 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 410 transitions. Word has length 13 [2019-12-27 04:39:31,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:31,883 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 410 transitions. [2019-12-27 04:39:31,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:31,883 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 410 transitions. [2019-12-27 04:39:31,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:31,884 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:31,884 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:32,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:32,084 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:32,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:32,085 INFO L82 PathProgramCache]: Analyzing trace with hash -573260427, now seen corresponding path program 51 times [2019-12-27 04:39:32,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:32,086 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743544258] [2019-12-27 04:39:32,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:32,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:32,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743544258] [2019-12-27 04:39:32,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887305392] [2019-12-27 04:39:32,168 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 [2019-12-27 04:39:32,216 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:39:32,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:32,217 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:32,218 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:32,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:32,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:32,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180632774] [2019-12-27 04:39:32,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:32,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:32,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:32,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:32,338 INFO L87 Difference]: Start difference. First operand 169 states and 410 transitions. Second operand 16 states. [2019-12-27 04:39:32,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:32,660 INFO L93 Difference]: Finished difference Result 185 states and 433 transitions. [2019-12-27 04:39:32,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:39:32,661 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:32,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:32,663 INFO L225 Difference]: With dead ends: 185 [2019-12-27 04:39:32,663 INFO L226 Difference]: Without dead ends: 183 [2019-12-27 04:39:32,663 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2019-12-27 04:39:32,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-27 04:39:32,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 165. [2019-12-27 04:39:32,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-12-27 04:39:32,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 406 transitions. [2019-12-27 04:39:32,668 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 406 transitions. Word has length 13 [2019-12-27 04:39:32,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:32,669 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 406 transitions. [2019-12-27 04:39:32,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:32,669 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 406 transitions. [2019-12-27 04:39:32,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:32,669 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:32,670 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:32,873 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:32,873 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:32,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:32,873 INFO L82 PathProgramCache]: Analyzing trace with hash -573265077, now seen corresponding path program 52 times [2019-12-27 04:39:32,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:32,874 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868721711] [2019-12-27 04:39:32,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:32,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868721711] [2019-12-27 04:39:32,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142450039] [2019-12-27 04:39:32,976 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 [2019-12-27 04:39:33,019 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:39:33,019 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:33,020 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:33,020 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:34,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:34,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:34,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210138180] [2019-12-27 04:39:34,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:34,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:34,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:34,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=179, Unknown=3, NotChecked=0, Total=240 [2019-12-27 04:39:34,609 INFO L87 Difference]: Start difference. First operand 165 states and 406 transitions. Second operand 16 states. [2019-12-27 04:39:36,948 WARN L192 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-12-27 04:39:37,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:37,016 INFO L93 Difference]: Finished difference Result 187 states and 433 transitions. [2019-12-27 04:39:37,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 04:39:37,016 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:37,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:37,018 INFO L225 Difference]: With dead ends: 187 [2019-12-27 04:39:37,018 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 04:39:37,019 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=213, Invalid=484, Unknown=5, NotChecked=0, Total=702 [2019-12-27 04:39:37,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 04:39:37,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 161. [2019-12-27 04:39:37,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-27 04:39:37,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 393 transitions. [2019-12-27 04:39:37,025 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 393 transitions. Word has length 13 [2019-12-27 04:39:37,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:37,025 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 393 transitions. [2019-12-27 04:39:37,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:37,025 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 393 transitions. [2019-12-27 04:39:37,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:37,026 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:37,026 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:37,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:37,226 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:37,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:37,227 INFO L82 PathProgramCache]: Analyzing trace with hash -573265232, now seen corresponding path program 53 times [2019-12-27 04:39:37,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:37,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058321467] [2019-12-27 04:39:37,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:37,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058321467] [2019-12-27 04:39:37,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646773592] [2019-12-27 04:39:37,317 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:37,363 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:39:37,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:37,365 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:37,365 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:37,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:37,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:37,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311445479] [2019-12-27 04:39:37,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:37,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:37,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:37,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:37,485 INFO L87 Difference]: Start difference. First operand 161 states and 393 transitions. Second operand 16 states. [2019-12-27 04:39:37,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:37,835 INFO L93 Difference]: Finished difference Result 187 states and 430 transitions. [2019-12-27 04:39:37,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 04:39:37,835 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:37,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:37,837 INFO L225 Difference]: With dead ends: 187 [2019-12-27 04:39:37,837 INFO L226 Difference]: Without dead ends: 186 [2019-12-27 04:39:37,838 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 [2019-12-27 04:39:37,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-27 04:39:37,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 160. [2019-12-27 04:39:37,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-12-27 04:39:37,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2019-12-27 04:39:37,842 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 13 [2019-12-27 04:39:37,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:37,843 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2019-12-27 04:39:37,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:37,843 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2019-12-27 04:39:37,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:37,843 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:37,843 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:38,046 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:38,047 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:38,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:38,048 INFO L82 PathProgramCache]: Analyzing trace with hash -573414187, now seen corresponding path program 54 times [2019-12-27 04:39:38,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:38,048 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758340500] [2019-12-27 04:39:38,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:38,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:38,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758340500] [2019-12-27 04:39:38,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285353033] [2019-12-27 04:39:38,130 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 [2019-12-27 04:39:38,178 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 04:39:38,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:38,179 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:38,180 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:38,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:38,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:38,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:38,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43048952] [2019-12-27 04:39:38,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:38,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:38,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:38,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:38,321 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 16 states. [2019-12-27 04:39:38,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:38,914 INFO L93 Difference]: Finished difference Result 194 states and 441 transitions. [2019-12-27 04:39:38,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:39:38,915 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:38,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:38,917 INFO L225 Difference]: With dead ends: 194 [2019-12-27 04:39:38,917 INFO L226 Difference]: Without dead ends: 192 [2019-12-27 04:39:38,918 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 [2019-12-27 04:39:38,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-12-27 04:39:38,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 156. [2019-12-27 04:39:38,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-27 04:39:38,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 376 transitions. [2019-12-27 04:39:38,924 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 376 transitions. Word has length 13 [2019-12-27 04:39:38,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:38,924 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 376 transitions. [2019-12-27 04:39:38,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:38,925 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 376 transitions. [2019-12-27 04:39:38,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:38,926 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:38,926 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:39,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:39,131 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:39,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:39,132 INFO L82 PathProgramCache]: Analyzing trace with hash -716554982, now seen corresponding path program 55 times [2019-12-27 04:39:39,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:39,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700005961] [2019-12-27 04:39:39,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:39,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700005961] [2019-12-27 04:39:39,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428820729] [2019-12-27 04:39:39,223 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 [2019-12-27 04:39:39,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:39,277 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:39,278 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:39,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:39,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:39,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154263687] [2019-12-27 04:39:39,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:39,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:39,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:39,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:39,412 INFO L87 Difference]: Start difference. First operand 156 states and 376 transitions. Second operand 16 states. [2019-12-27 04:39:39,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:39,832 INFO L93 Difference]: Finished difference Result 218 states and 481 transitions. [2019-12-27 04:39:39,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:39:39,833 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:39,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:39,834 INFO L225 Difference]: With dead ends: 218 [2019-12-27 04:39:39,835 INFO L226 Difference]: Without dead ends: 217 [2019-12-27 04:39:39,835 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 [2019-12-27 04:39:39,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-12-27 04:39:39,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 154. [2019-12-27 04:39:39,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 04:39:39,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 367 transitions. [2019-12-27 04:39:39,838 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 367 transitions. Word has length 13 [2019-12-27 04:39:39,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:39,839 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 367 transitions. [2019-12-27 04:39:39,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:39,839 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 367 transitions. [2019-12-27 04:39:39,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:39,839 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:39,839 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:40,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:40,040 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:40,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:40,041 INFO L82 PathProgramCache]: Analyzing trace with hash -716555137, now seen corresponding path program 56 times [2019-12-27 04:39:40,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:40,041 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510464345] [2019-12-27 04:39:40,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:40,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510464345] [2019-12-27 04:39:40,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039811388] [2019-12-27 04:39:40,124 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 [2019-12-27 04:39:40,170 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:39:40,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:40,171 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:40,171 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:40,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:40,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:40,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839985240] [2019-12-27 04:39:40,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:40,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:40,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:40,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:40,272 INFO L87 Difference]: Start difference. First operand 154 states and 367 transitions. Second operand 16 states. [2019-12-27 04:39:40,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:40,587 INFO L93 Difference]: Finished difference Result 231 states and 505 transitions. [2019-12-27 04:39:40,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:40,587 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:40,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:40,589 INFO L225 Difference]: With dead ends: 231 [2019-12-27 04:39:40,589 INFO L226 Difference]: Without dead ends: 229 [2019-12-27 04:39:40,590 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 [2019-12-27 04:39:40,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-12-27 04:39:40,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 152. [2019-12-27 04:39:40,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 04:39:40,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 359 transitions. [2019-12-27 04:39:40,593 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 359 transitions. Word has length 13 [2019-12-27 04:39:40,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:40,593 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 359 transitions. [2019-12-27 04:39:40,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:40,594 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 359 transitions. [2019-12-27 04:39:40,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:40,594 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:40,594 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:40,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:40,795 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:40,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:40,796 INFO L82 PathProgramCache]: Analyzing trace with hash -716559787, now seen corresponding path program 57 times [2019-12-27 04:39:40,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:40,797 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410994641] [2019-12-27 04:39:40,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:40,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410994641] [2019-12-27 04:39:40,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703330758] [2019-12-27 04:39:40,874 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 [2019-12-27 04:39:40,915 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:39:40,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:40,917 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:40,917 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:41,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:41,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:41,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30078100] [2019-12-27 04:39:41,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:41,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:41,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:41,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:41,045 INFO L87 Difference]: Start difference. First operand 152 states and 359 transitions. Second operand 16 states. [2019-12-27 04:39:41,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:41,479 INFO L93 Difference]: Finished difference Result 225 states and 480 transitions. [2019-12-27 04:39:41,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:39:41,479 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:41,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:41,481 INFO L225 Difference]: With dead ends: 225 [2019-12-27 04:39:41,481 INFO L226 Difference]: Without dead ends: 223 [2019-12-27 04:39:41,482 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 [2019-12-27 04:39:41,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-27 04:39:41,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 145. [2019-12-27 04:39:41,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 04:39:41,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 330 transitions. [2019-12-27 04:39:41,485 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 330 transitions. Word has length 13 [2019-12-27 04:39:41,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:41,485 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 330 transitions. [2019-12-27 04:39:41,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:41,485 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 330 transitions. [2019-12-27 04:39:41,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:41,486 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:41,486 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:41,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:41,689 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:41,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:41,690 INFO L82 PathProgramCache]: Analyzing trace with hash -721177547, now seen corresponding path program 58 times [2019-12-27 04:39:41,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:41,691 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961008900] [2019-12-27 04:39:41,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:41,773 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:41,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961008900] [2019-12-27 04:39:41,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897438991] [2019-12-27 04:39:41,774 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 [2019-12-27 04:39:41,819 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:39:41,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:41,820 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:41,820 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:41,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:41,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:41,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951007501] [2019-12-27 04:39:41,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:41,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:41,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:41,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:41,931 INFO L87 Difference]: Start difference. First operand 145 states and 330 transitions. Second operand 16 states. [2019-12-27 04:39:42,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:42,236 INFO L93 Difference]: Finished difference Result 156 states and 335 transitions. [2019-12-27 04:39:42,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:39:42,236 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:42,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:42,238 INFO L225 Difference]: With dead ends: 156 [2019-12-27 04:39:42,238 INFO L226 Difference]: Without dead ends: 146 [2019-12-27 04:39:42,238 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 [2019-12-27 04:39:42,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-27 04:39:42,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 137. [2019-12-27 04:39:42,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 04:39:42,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 299 transitions. [2019-12-27 04:39:42,242 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 299 transitions. Word has length 13 [2019-12-27 04:39:42,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:42,242 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 299 transitions. [2019-12-27 04:39:42,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:42,242 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 299 transitions. [2019-12-27 04:39:42,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:42,243 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:42,243 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:42,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:42,446 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:42,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:42,447 INFO L82 PathProgramCache]: Analyzing trace with hash 801705142, now seen corresponding path program 59 times [2019-12-27 04:39:42,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:42,447 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220842487] [2019-12-27 04:39:42,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:42,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:42,568 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220842487] [2019-12-27 04:39:42,568 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302594052] [2019-12-27 04:39:42,568 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 [2019-12-27 04:39:42,626 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:39:42,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:42,628 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:42,629 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:42,802 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:42,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:42,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:42,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979237506] [2019-12-27 04:39:42,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:42,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:42,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:42,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:42,804 INFO L87 Difference]: Start difference. First operand 137 states and 299 transitions. Second operand 18 states. [2019-12-27 04:39:43,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:43,281 INFO L93 Difference]: Finished difference Result 174 states and 370 transitions. [2019-12-27 04:39:43,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:39:43,282 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:43,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:43,283 INFO L225 Difference]: With dead ends: 174 [2019-12-27 04:39:43,283 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 04:39:43,284 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:39:43,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 04:39:43,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 137. [2019-12-27 04:39:43,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 04:39:43,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 301 transitions. [2019-12-27 04:39:43,288 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 301 transitions. Word has length 14 [2019-12-27 04:39:43,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:43,288 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 301 transitions. [2019-12-27 04:39:43,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:43,288 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 301 transitions. [2019-12-27 04:39:43,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:43,289 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:43,289 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:43,492 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:43,493 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:43,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:43,493 INFO L82 PathProgramCache]: Analyzing trace with hash 802747827, now seen corresponding path program 60 times [2019-12-27 04:39:43,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:43,493 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441622938] [2019-12-27 04:39:43,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:43,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:43,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441622938] [2019-12-27 04:39:43,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887544099] [2019-12-27 04:39:43,591 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 [2019-12-27 04:39:43,638 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:39:43,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:43,639 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:43,640 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:43,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:43,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:43,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017437253] [2019-12-27 04:39:43,781 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:43,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:43,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:43,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:43,782 INFO L87 Difference]: Start difference. First operand 137 states and 301 transitions. Second operand 18 states. [2019-12-27 04:39:44,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:44,240 INFO L93 Difference]: Finished difference Result 178 states and 381 transitions. [2019-12-27 04:39:44,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:39:44,240 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:44,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:44,242 INFO L225 Difference]: With dead ends: 178 [2019-12-27 04:39:44,242 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 04:39:44,242 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 [2019-12-27 04:39:44,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 04:39:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 140. [2019-12-27 04:39:44,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 04:39:44,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 312 transitions. [2019-12-27 04:39:44,246 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 312 transitions. Word has length 14 [2019-12-27 04:39:44,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:44,247 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 312 transitions. [2019-12-27 04:39:44,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:44,247 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 312 transitions. [2019-12-27 04:39:44,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:44,247 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:44,247 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:44,450 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:44,450 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:44,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:44,451 INFO L82 PathProgramCache]: Analyzing trace with hash 802747672, now seen corresponding path program 61 times [2019-12-27 04:39:44,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:44,452 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598644990] [2019-12-27 04:39:44,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:44,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598644990] [2019-12-27 04:39:44,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862040810] [2019-12-27 04:39:44,559 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 [2019-12-27 04:39:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:44,630 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:44,631 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:45,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:45,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:45,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430159421] [2019-12-27 04:39:45,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:45,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:45,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:45,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:45,044 INFO L87 Difference]: Start difference. First operand 140 states and 312 transitions. Second operand 18 states. [2019-12-27 04:39:45,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:45,694 INFO L93 Difference]: Finished difference Result 200 states and 425 transitions. [2019-12-27 04:39:45,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:45,695 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:45,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:45,697 INFO L225 Difference]: With dead ends: 200 [2019-12-27 04:39:45,697 INFO L226 Difference]: Without dead ends: 197 [2019-12-27 04:39:45,697 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:39:45,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-27 04:39:45,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 140. [2019-12-27 04:39:45,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 04:39:45,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 311 transitions. [2019-12-27 04:39:45,701 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 311 transitions. Word has length 14 [2019-12-27 04:39:45,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:45,701 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 311 transitions. [2019-12-27 04:39:45,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:45,701 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 311 transitions. [2019-12-27 04:39:45,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:45,701 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:45,702 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:45,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:45,902 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:45,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:45,903 INFO L82 PathProgramCache]: Analyzing trace with hash 802743022, now seen corresponding path program 62 times [2019-12-27 04:39:45,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:45,903 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709184851] [2019-12-27 04:39:45,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:45,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:45,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:45,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709184851] [2019-12-27 04:39:45,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467483404] [2019-12-27 04:39:45,998 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 [2019-12-27 04:39:46,041 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:39:46,041 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:46,042 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:46,043 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:47,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:47,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:47,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67779813] [2019-12-27 04:39:47,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:47,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:47,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:47,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=230, Unknown=2, NotChecked=0, Total=306 [2019-12-27 04:39:47,403 INFO L87 Difference]: Start difference. First operand 140 states and 311 transitions. Second operand 18 states. [2019-12-27 04:39:48,423 WARN L192 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2019-12-27 04:39:48,775 WARN L192 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-12-27 04:39:48,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:48,958 INFO L93 Difference]: Finished difference Result 201 states and 427 transitions. [2019-12-27 04:39:48,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:48,958 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:48,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:48,960 INFO L225 Difference]: With dead ends: 201 [2019-12-27 04:39:48,960 INFO L226 Difference]: Without dead ends: 199 [2019-12-27 04:39:48,961 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=307, Invalid=683, Unknown=2, NotChecked=0, Total=992 [2019-12-27 04:39:48,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-27 04:39:48,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 140. [2019-12-27 04:39:48,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 04:39:48,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 311 transitions. [2019-12-27 04:39:48,964 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 311 transitions. Word has length 14 [2019-12-27 04:39:48,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:48,964 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 311 transitions. [2019-12-27 04:39:48,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:48,964 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 311 transitions. [2019-12-27 04:39:48,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:48,965 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:48,965 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:49,165 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:49,166 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:49,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:49,166 INFO L82 PathProgramCache]: Analyzing trace with hash 835071062, now seen corresponding path program 63 times [2019-12-27 04:39:49,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:49,167 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744864883] [2019-12-27 04:39:49,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:49,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744864883] [2019-12-27 04:39:49,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656496707] [2019-12-27 04:39:49,253 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 [2019-12-27 04:39:49,297 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:39:49,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:49,298 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:49,299 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:49,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:49,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:49,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:49,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246554069] [2019-12-27 04:39:49,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:49,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:49,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:49,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:49,457 INFO L87 Difference]: Start difference. First operand 140 states and 311 transitions. Second operand 18 states. [2019-12-27 04:39:49,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:49,981 INFO L93 Difference]: Finished difference Result 184 states and 394 transitions. [2019-12-27 04:39:49,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 04:39:49,982 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:49,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:49,983 INFO L225 Difference]: With dead ends: 184 [2019-12-27 04:39:49,983 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 04:39:49,984 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=348, Invalid=774, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:39:49,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 04:39:49,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 149. [2019-12-27 04:39:49,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 04:39:49,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 337 transitions. [2019-12-27 04:39:49,987 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 337 transitions. Word has length 14 [2019-12-27 04:39:49,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:49,987 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 337 transitions. [2019-12-27 04:39:49,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:49,988 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 337 transitions. [2019-12-27 04:39:49,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:49,988 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:49,988 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:50,188 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:50,189 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:50,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:50,189 INFO L82 PathProgramCache]: Analyzing trace with hash 835070907, now seen corresponding path program 64 times [2019-12-27 04:39:50,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:50,190 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732399737] [2019-12-27 04:39:50,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:50,297 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732399737] [2019-12-27 04:39:50,297 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788222822] [2019-12-27 04:39:50,297 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 [2019-12-27 04:39:50,342 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:39:50,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:50,342 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:50,343 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:51,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:51,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:51,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:51,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351565337] [2019-12-27 04:39:51,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:51,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:51,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:51,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=233, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:39:51,402 INFO L87 Difference]: Start difference. First operand 149 states and 337 transitions. Second operand 18 states. [2019-12-27 04:39:51,875 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2019-12-27 04:39:52,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:52,382 INFO L93 Difference]: Finished difference Result 226 states and 480 transitions. [2019-12-27 04:39:52,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:39:52,383 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:52,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:52,384 INFO L225 Difference]: With dead ends: 226 [2019-12-27 04:39:52,385 INFO L226 Difference]: Without dead ends: 224 [2019-12-27 04:39:52,385 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=353, Invalid=768, Unknown=1, NotChecked=0, Total=1122 [2019-12-27 04:39:52,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-12-27 04:39:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 149. [2019-12-27 04:39:52,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 04:39:52,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 337 transitions. [2019-12-27 04:39:52,389 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 337 transitions. Word has length 14 [2019-12-27 04:39:52,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:52,389 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 337 transitions. [2019-12-27 04:39:52,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:52,389 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 337 transitions. [2019-12-27 04:39:52,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:52,390 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:52,390 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:52,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:52,593 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:52,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:52,594 INFO L82 PathProgramCache]: Analyzing trace with hash 835066257, now seen corresponding path program 65 times [2019-12-27 04:39:52,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:52,594 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014644810] [2019-12-27 04:39:52,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:52,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014644810] [2019-12-27 04:39:52,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070230030] [2019-12-27 04:39:52,685 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 [2019-12-27 04:39:52,731 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:39:52,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:52,732 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:52,733 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:55,279 WARN L192 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-27 04:39:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:55,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:55,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:55,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098460389] [2019-12-27 04:39:55,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:55,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:55,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:55,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:39:55,282 INFO L87 Difference]: Start difference. First operand 149 states and 337 transitions. Second operand 18 states. [2019-12-27 04:39:55,782 WARN L192 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-27 04:39:56,244 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2019-12-27 04:39:57,897 WARN L192 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2019-12-27 04:39:58,347 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-27 04:39:58,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:58,398 INFO L93 Difference]: Finished difference Result 229 states and 487 transitions. [2019-12-27 04:39:58,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:39:58,399 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:58,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:58,401 INFO L225 Difference]: With dead ends: 229 [2019-12-27 04:39:58,401 INFO L226 Difference]: Without dead ends: 228 [2019-12-27 04:39:58,401 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=350, Invalid=771, Unknown=1, NotChecked=0, Total=1122 [2019-12-27 04:39:58,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2019-12-27 04:39:58,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 150. [2019-12-27 04:39:58,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 04:39:58,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 341 transitions. [2019-12-27 04:39:58,405 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 341 transitions. Word has length 14 [2019-12-27 04:39:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:58,405 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 341 transitions. [2019-12-27 04:39:58,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:58,405 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 341 transitions. [2019-12-27 04:39:58,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:58,406 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:58,406 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:58,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:58,607 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:58,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:58,607 INFO L82 PathProgramCache]: Analyzing trace with hash 835066102, now seen corresponding path program 66 times [2019-12-27 04:39:58,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:58,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150091969] [2019-12-27 04:39:58,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:58,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150091969] [2019-12-27 04:39:58,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558067487] [2019-12-27 04:39:58,701 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 [2019-12-27 04:39:58,747 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 04:39:58,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:58,748 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:58,748 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:00,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:00,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:00,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:00,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180334420] [2019-12-27 04:40:00,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:00,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:00,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:00,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:40:00,183 INFO L87 Difference]: Start difference. First operand 150 states and 341 transitions. Second operand 18 states. [2019-12-27 04:40:01,508 WARN L192 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 24 [2019-12-27 04:40:02,342 WARN L192 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-27 04:40:02,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:02,729 INFO L93 Difference]: Finished difference Result 220 states and 470 transitions. [2019-12-27 04:40:02,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:40:02,729 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:02,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:02,732 INFO L225 Difference]: With dead ends: 220 [2019-12-27 04:40:02,732 INFO L226 Difference]: Without dead ends: 216 [2019-12-27 04:40:02,732 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=378, Invalid=811, Unknown=1, NotChecked=0, Total=1190 [2019-12-27 04:40:02,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-12-27 04:40:02,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 149. [2019-12-27 04:40:02,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 04:40:02,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-27 04:40:02,737 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-27 04:40:02,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:02,737 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-27 04:40:02,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:02,737 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-27 04:40:02,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:02,738 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:02,738 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:02,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:02,942 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:02,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:02,942 INFO L82 PathProgramCache]: Analyzing trace with hash 834922107, now seen corresponding path program 67 times [2019-12-27 04:40:02,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:02,943 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340922893] [2019-12-27 04:40:02,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:03,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340922893] [2019-12-27 04:40:03,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156647094] [2019-12-27 04:40:03,046 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 [2019-12-27 04:40:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:03,085 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:03,086 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:07,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:07,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:07,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181584731] [2019-12-27 04:40:07,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:07,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:07,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:07,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=231, Unknown=2, NotChecked=0, Total=306 [2019-12-27 04:40:07,178 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 18 states. [2019-12-27 04:40:07,660 WARN L192 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2019-12-27 04:40:08,149 WARN L192 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-27 04:40:08,540 WARN L192 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2019-12-27 04:40:09,301 WARN L192 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2019-12-27 04:40:11,064 WARN L192 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-27 04:40:11,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:11,428 INFO L93 Difference]: Finished difference Result 223 states and 479 transitions. [2019-12-27 04:40:11,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:40:11,429 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:11,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:11,430 INFO L225 Difference]: With dead ends: 223 [2019-12-27 04:40:11,431 INFO L226 Difference]: Without dead ends: 222 [2019-12-27 04:40:11,431 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=310, Invalid=743, Unknown=3, NotChecked=0, Total=1056 [2019-12-27 04:40:11,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-27 04:40:11,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 151. [2019-12-27 04:40:11,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 04:40:11,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 343 transitions. [2019-12-27 04:40:11,435 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 343 transitions. Word has length 14 [2019-12-27 04:40:11,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:11,435 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 343 transitions. [2019-12-27 04:40:11,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:11,435 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 343 transitions. [2019-12-27 04:40:11,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:11,436 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:11,436 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:11,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:11,637 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:11,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:11,637 INFO L82 PathProgramCache]: Analyzing trace with hash 834921952, now seen corresponding path program 68 times [2019-12-27 04:40:11,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:11,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987173174] [2019-12-27 04:40:11,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:11,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987173174] [2019-12-27 04:40:11,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008620661] [2019-12-27 04:40:11,784 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 [2019-12-27 04:40:11,831 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:40:11,831 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:11,832 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:11,833 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:14,270 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_239 Int)) (and (<= c_~i~0 (+ (* 3 v_~j~0_239) 2)) (<= (div (+ (* v_~j~0_239 (- 1)) 1) (- 3)) 1) (<= c_~j~0 (+ (* 2 v_~j~0_239) c_~i~0 1)))) is different from true [2019-12-27 04:40:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:14,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:14,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:14,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447933926] [2019-12-27 04:40:14,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:14,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:14,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:14,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=202, Unknown=2, NotChecked=30, Total=306 [2019-12-27 04:40:14,272 INFO L87 Difference]: Start difference. First operand 151 states and 343 transitions. Second operand 18 states. [2019-12-27 04:40:14,911 WARN L192 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2019-12-27 04:40:15,515 WARN L192 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2019-12-27 04:40:16,256 WARN L192 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-12-27 04:40:18,687 WARN L192 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-12-27 04:40:18,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:18,707 INFO L93 Difference]: Finished difference Result 217 states and 469 transitions. [2019-12-27 04:40:18,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:40:18,708 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:18,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:18,709 INFO L225 Difference]: With dead ends: 217 [2019-12-27 04:40:18,710 INFO L226 Difference]: Without dead ends: 213 [2019-12-27 04:40:18,710 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=289, Invalid=640, Unknown=5, NotChecked=58, Total=992 [2019-12-27 04:40:18,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-12-27 04:40:18,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 150. [2019-12-27 04:40:18,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 04:40:18,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 339 transitions. [2019-12-27 04:40:18,714 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 339 transitions. Word has length 14 [2019-12-27 04:40:18,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:18,715 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 339 transitions. [2019-12-27 04:40:18,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:18,715 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 339 transitions. [2019-12-27 04:40:18,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:18,715 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:18,716 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:18,916 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:18,916 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:18,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:18,917 INFO L82 PathProgramCache]: Analyzing trace with hash 834917302, now seen corresponding path program 69 times [2019-12-27 04:40:18,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:18,917 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362122367] [2019-12-27 04:40:18,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:19,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362122367] [2019-12-27 04:40:19,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428626826] [2019-12-27 04:40:19,023 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 [2019-12-27 04:40:19,069 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:40:19,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:19,071 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:19,072 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:27,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:27,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:27,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180570456] [2019-12-27 04:40:27,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:27,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:27,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:27,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=230, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:40:27,441 INFO L87 Difference]: Start difference. First operand 150 states and 339 transitions. Second operand 18 states. [2019-12-27 04:40:28,394 WARN L192 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2019-12-27 04:40:30,533 WARN L192 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-27 04:40:33,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:33,764 INFO L93 Difference]: Finished difference Result 206 states and 445 transitions. [2019-12-27 04:40:33,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:40:33,765 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:33,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:33,766 INFO L225 Difference]: With dead ends: 206 [2019-12-27 04:40:33,767 INFO L226 Difference]: Without dead ends: 204 [2019-12-27 04:40:33,767 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=275, Invalid=652, Unknown=3, NotChecked=0, Total=930 [2019-12-27 04:40:33,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-12-27 04:40:33,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 149. [2019-12-27 04:40:33,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 04:40:33,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-27 04:40:33,771 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-27 04:40:33,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:33,771 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-27 04:40:33,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:33,771 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-27 04:40:33,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:33,772 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:33,772 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:33,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:33,973 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:33,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:33,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086542, now seen corresponding path program 70 times [2019-12-27 04:40:33,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:33,974 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174617245] [2019-12-27 04:40:33,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:34,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174617245] [2019-12-27 04:40:34,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357392626] [2019-12-27 04:40:34,071 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 [2019-12-27 04:40:34,117 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:40:34,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:34,118 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:34,119 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:34,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:34,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:34,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334713346] [2019-12-27 04:40:34,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:34,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:34,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:34,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:40:34,325 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 18 states. [2019-12-27 04:40:35,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:35,086 INFO L93 Difference]: Finished difference Result 245 states and 526 transitions. [2019-12-27 04:40:35,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:40:35,086 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:35,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:35,088 INFO L225 Difference]: With dead ends: 245 [2019-12-27 04:40:35,089 INFO L226 Difference]: Without dead ends: 241 [2019-12-27 04:40:35,089 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 [2019-12-27 04:40:35,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-12-27 04:40:35,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 155. [2019-12-27 04:40:35,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-27 04:40:35,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 354 transitions. [2019-12-27 04:40:35,093 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 354 transitions. Word has length 14 [2019-12-27 04:40:35,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:35,094 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 354 transitions. [2019-12-27 04:40:35,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:35,094 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 354 transitions. [2019-12-27 04:40:35,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:35,094 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:35,094 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:35,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:35,295 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:35,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:35,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086387, now seen corresponding path program 71 times [2019-12-27 04:40:35,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:35,297 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039403392] [2019-12-27 04:40:35,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:35,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039403392] [2019-12-27 04:40:35,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671119928] [2019-12-27 04:40:35,405 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 [2019-12-27 04:40:35,450 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 04:40:35,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:35,451 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:35,452 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:35,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:35,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:35,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128425315] [2019-12-27 04:40:35,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:35,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:35,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:35,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:40:35,638 INFO L87 Difference]: Start difference. First operand 155 states and 354 transitions. Second operand 18 states. [2019-12-27 04:40:36,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:36,368 INFO L93 Difference]: Finished difference Result 237 states and 509 transitions. [2019-12-27 04:40:36,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:40:36,369 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:36,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:36,371 INFO L225 Difference]: With dead ends: 237 [2019-12-27 04:40:36,371 INFO L226 Difference]: Without dead ends: 235 [2019-12-27 04:40:36,371 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=344, Invalid=778, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:40:36,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-27 04:40:36,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 153. [2019-12-27 04:40:36,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 04:40:36,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 347 transitions. [2019-12-27 04:40:36,377 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 347 transitions. Word has length 14 [2019-12-27 04:40:36,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:36,377 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 347 transitions. [2019-12-27 04:40:36,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:36,377 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 347 transitions. [2019-12-27 04:40:36,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:36,378 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:36,378 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:36,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:36,579 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:36,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:36,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942392, now seen corresponding path program 72 times [2019-12-27 04:40:36,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:36,580 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387878717] [2019-12-27 04:40:36,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:36,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387878717] [2019-12-27 04:40:36,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011821918] [2019-12-27 04:40:36,670 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 [2019-12-27 04:40:36,715 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:40:36,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:36,716 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:36,717 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:36,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:36,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:36,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91319291] [2019-12-27 04:40:36,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:36,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:36,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:36,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:40:36,971 INFO L87 Difference]: Start difference. First operand 153 states and 347 transitions. Second operand 18 states. [2019-12-27 04:40:38,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:38,620 INFO L93 Difference]: Finished difference Result 245 states and 527 transitions. [2019-12-27 04:40:38,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:40:38,621 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:38,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:38,622 INFO L225 Difference]: With dead ends: 245 [2019-12-27 04:40:38,623 INFO L226 Difference]: Without dead ends: 240 [2019-12-27 04:40:38,623 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=289, Invalid=702, Unknown=1, NotChecked=0, Total=992 [2019-12-27 04:40:38,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-12-27 04:40:38,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 157. [2019-12-27 04:40:38,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 04:40:38,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 361 transitions. [2019-12-27 04:40:38,627 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 361 transitions. Word has length 14 [2019-12-27 04:40:38,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:38,628 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 361 transitions. [2019-12-27 04:40:38,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:38,628 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 361 transitions. [2019-12-27 04:40:38,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:38,629 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:38,629 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:38,832 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:38,832 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:38,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:38,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942237, now seen corresponding path program 73 times [2019-12-27 04:40:38,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:38,833 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465826125] [2019-12-27 04:40:38,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:38,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:38,928 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465826125] [2019-12-27 04:40:38,928 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598133318] [2019-12-27 04:40:38,928 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 [2019-12-27 04:40:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:38,972 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:38,972 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:39,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:39,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:39,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740562083] [2019-12-27 04:40:39,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:39,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:39,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:39,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:40:39,203 INFO L87 Difference]: Start difference. First operand 157 states and 361 transitions. Second operand 18 states. [2019-12-27 04:40:40,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:40,430 INFO L93 Difference]: Finished difference Result 267 states and 576 transitions. [2019-12-27 04:40:40,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:40:40,430 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:40,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:40,433 INFO L225 Difference]: With dead ends: 267 [2019-12-27 04:40:40,433 INFO L226 Difference]: Without dead ends: 260 [2019-12-27 04:40:40,433 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=336, Invalid=786, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:40:40,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-12-27 04:40:40,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 158. [2019-12-27 04:40:40,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-27 04:40:40,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 361 transitions. [2019-12-27 04:40:40,438 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 361 transitions. Word has length 14 [2019-12-27 04:40:40,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:40,439 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 361 transitions. [2019-12-27 04:40:40,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:40,439 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 361 transitions. [2019-12-27 04:40:40,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:40,439 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:40,439 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:40,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:40,643 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:40,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:40,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1836937587, now seen corresponding path program 74 times [2019-12-27 04:40:40,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:40,644 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560913596] [2019-12-27 04:40:40,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:40,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560913596] [2019-12-27 04:40:40,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694108969] [2019-12-27 04:40:40,743 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 [2019-12-27 04:40:40,784 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:40:40,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:40,785 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:40,786 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:43,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:43,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:43,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306613882] [2019-12-27 04:40:43,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:43,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:43,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:43,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:40:43,166 INFO L87 Difference]: Start difference. First operand 158 states and 361 transitions. Second operand 18 states. [2019-12-27 04:40:47,840 WARN L192 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-12-27 04:40:54,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:54,648 INFO L93 Difference]: Finished difference Result 269 states and 580 transitions. [2019-12-27 04:40:54,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 04:40:54,649 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:54,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:54,652 INFO L225 Difference]: With dead ends: 269 [2019-12-27 04:40:54,652 INFO L226 Difference]: Without dead ends: 266 [2019-12-27 04:40:54,653 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=334, Invalid=787, Unknown=1, NotChecked=0, Total=1122 [2019-12-27 04:40:54,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-12-27 04:40:54,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 161. [2019-12-27 04:40:54,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-27 04:40:54,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 374 transitions. [2019-12-27 04:40:54,657 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 374 transitions. Word has length 14 [2019-12-27 04:40:54,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:54,657 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 374 transitions. [2019-12-27 04:40:54,657 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:54,657 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 374 transitions. [2019-12-27 04:40:54,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:54,658 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:54,658 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:54,858 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:54,859 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:54,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:54,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473742, now seen corresponding path program 75 times [2019-12-27 04:40:54,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:54,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471498172] [2019-12-27 04:40:54,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:54,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471498172] [2019-12-27 04:40:54,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408594684] [2019-12-27 04:40:54,952 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 [2019-12-27 04:40:54,996 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:40:54,997 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:54,998 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:54,999 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:55,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:55,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:55,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259234032] [2019-12-27 04:40:55,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:55,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:55,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:55,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:40:55,241 INFO L87 Difference]: Start difference. First operand 161 states and 374 transitions. Second operand 18 states. [2019-12-27 04:40:56,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:56,420 INFO L93 Difference]: Finished difference Result 225 states and 497 transitions. [2019-12-27 04:40:56,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 04:40:56,420 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:56,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:56,422 INFO L225 Difference]: With dead ends: 225 [2019-12-27 04:40:56,422 INFO L226 Difference]: Without dead ends: 224 [2019-12-27 04:40:56,423 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=415, Invalid=1067, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 04:40:56,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-12-27 04:40:56,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 162. [2019-12-27 04:40:56,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-27 04:40:56,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 378 transitions. [2019-12-27 04:40:56,426 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 378 transitions. Word has length 14 [2019-12-27 04:40:56,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:56,426 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 378 transitions. [2019-12-27 04:40:56,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:56,426 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 378 transitions. [2019-12-27 04:40:56,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:56,427 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:56,427 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:56,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:56,628 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:56,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:56,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473587, now seen corresponding path program 76 times [2019-12-27 04:40:56,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:56,629 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166864161] [2019-12-27 04:40:56,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:56,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166864161] [2019-12-27 04:40:56,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852757234] [2019-12-27 04:40:56,723 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 [2019-12-27 04:40:56,768 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:40:56,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:56,769 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:56,770 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:59,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:59,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:59,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997891254] [2019-12-27 04:40:59,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:59,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:59,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:59,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=230, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:40:59,641 INFO L87 Difference]: Start difference. First operand 162 states and 378 transitions. Second operand 18 states. [2019-12-27 04:41:07,212 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-27 04:41:11,831 WARN L192 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-27 04:41:12,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:12,024 INFO L93 Difference]: Finished difference Result 249 states and 555 transitions. [2019-12-27 04:41:12,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:41:12,025 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:12,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:12,026 INFO L225 Difference]: With dead ends: 249 [2019-12-27 04:41:12,026 INFO L226 Difference]: Without dead ends: 248 [2019-12-27 04:41:12,027 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=248, Invalid=620, Unknown=2, NotChecked=0, Total=870 [2019-12-27 04:41:12,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2019-12-27 04:41:12,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 162. [2019-12-27 04:41:12,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-27 04:41:12,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 378 transitions. [2019-12-27 04:41:12,030 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 378 transitions. Word has length 14 [2019-12-27 04:41:12,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:12,030 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 378 transitions. [2019-12-27 04:41:12,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:12,030 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 378 transitions. [2019-12-27 04:41:12,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:12,031 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:12,031 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:12,231 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:12,232 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:12,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:12,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468937, now seen corresponding path program 77 times [2019-12-27 04:41:12,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:12,233 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706567824] [2019-12-27 04:41:12,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:12,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:12,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706567824] [2019-12-27 04:41:12,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368794605] [2019-12-27 04:41:12,374 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 [2019-12-27 04:41:12,420 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:41:12,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:12,421 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:12,422 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:12,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:12,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:12,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:12,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817003804] [2019-12-27 04:41:12,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:12,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:12,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:12,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:12,807 INFO L87 Difference]: Start difference. First operand 162 states and 378 transitions. Second operand 18 states. [2019-12-27 04:41:13,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:13,603 INFO L93 Difference]: Finished difference Result 249 states and 559 transitions. [2019-12-27 04:41:13,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:41:13,604 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:13,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:13,606 INFO L225 Difference]: With dead ends: 249 [2019-12-27 04:41:13,606 INFO L226 Difference]: Without dead ends: 248 [2019-12-27 04:41:13,606 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2019-12-27 04:41:13,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2019-12-27 04:41:13,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 162. [2019-12-27 04:41:13,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-27 04:41:13,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 378 transitions. [2019-12-27 04:41:13,610 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 378 transitions. Word has length 14 [2019-12-27 04:41:13,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:13,611 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 378 transitions. [2019-12-27 04:41:13,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:13,611 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 378 transitions. [2019-12-27 04:41:13,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:13,611 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:13,611 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:13,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:13,812 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:13,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:13,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468782, now seen corresponding path program 78 times [2019-12-27 04:41:13,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:13,813 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589311134] [2019-12-27 04:41:13,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:13,918 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:13,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589311134] [2019-12-27 04:41:13,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226435994] [2019-12-27 04:41:13,919 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 [2019-12-27 04:41:13,967 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 04:41:13,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:13,968 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:13,969 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:14,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:14,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:14,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776917511] [2019-12-27 04:41:14,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:14,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:14,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:14,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:14,322 INFO L87 Difference]: Start difference. First operand 162 states and 378 transitions. Second operand 18 states. [2019-12-27 04:41:15,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:15,337 INFO L93 Difference]: Finished difference Result 242 states and 528 transitions. [2019-12-27 04:41:15,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 04:41:15,337 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:15,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:15,339 INFO L225 Difference]: With dead ends: 242 [2019-12-27 04:41:15,340 INFO L226 Difference]: Without dead ends: 238 [2019-12-27 04:41:15,340 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=314, Invalid=742, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 04:41:15,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-12-27 04:41:15,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 161. [2019-12-27 04:41:15,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-27 04:41:15,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 374 transitions. [2019-12-27 04:41:15,345 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 374 transitions. Word has length 14 [2019-12-27 04:41:15,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:15,346 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 374 transitions. [2019-12-27 04:41:15,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:15,346 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 374 transitions. [2019-12-27 04:41:15,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:15,346 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:15,346 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:15,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:15,547 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:15,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:15,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1832324787, now seen corresponding path program 79 times [2019-12-27 04:41:15,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:15,548 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950282966] [2019-12-27 04:41:15,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:15,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950282966] [2019-12-27 04:41:15,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98531256] [2019-12-27 04:41:15,652 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 [2019-12-27 04:41:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:15,694 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:15,695 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:30,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:30,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:30,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628080392] [2019-12-27 04:41:30,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:30,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:30,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:30,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:30,180 INFO L87 Difference]: Start difference. First operand 161 states and 374 transitions. Second operand 18 states. [2019-12-27 04:41:32,965 WARN L192 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-27 04:41:35,122 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-27 04:41:35,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:35,645 INFO L93 Difference]: Finished difference Result 236 states and 519 transitions. [2019-12-27 04:41:35,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:41:35,645 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:35,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:35,647 INFO L225 Difference]: With dead ends: 236 [2019-12-27 04:41:35,647 INFO L226 Difference]: Without dead ends: 235 [2019-12-27 04:41:35,648 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=275, Invalid=717, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:41:35,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-27 04:41:35,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 158. [2019-12-27 04:41:35,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-27 04:41:35,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 365 transitions. [2019-12-27 04:41:35,651 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 365 transitions. Word has length 14 [2019-12-27 04:41:35,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:35,651 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 365 transitions. [2019-12-27 04:41:35,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:35,651 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 365 transitions. [2019-12-27 04:41:35,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:35,652 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:35,652 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:35,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:35,853 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:35,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:35,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1460018341, now seen corresponding path program 80 times [2019-12-27 04:41:35,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:35,854 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728177643] [2019-12-27 04:41:35,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:36,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728177643] [2019-12-27 04:41:36,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957936682] [2019-12-27 04:41:36,012 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 [2019-12-27 04:41:36,058 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:41:36,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:36,059 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:36,060 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:36,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:36,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:36,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311505872] [2019-12-27 04:41:36,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:36,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:36,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:36,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:36,222 INFO L87 Difference]: Start difference. First operand 158 states and 365 transitions. Second operand 18 states. [2019-12-27 04:41:36,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:36,964 INFO L93 Difference]: Finished difference Result 199 states and 441 transitions. [2019-12-27 04:41:36,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:41:36,964 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:36,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:36,966 INFO L225 Difference]: With dead ends: 199 [2019-12-27 04:41:36,966 INFO L226 Difference]: Without dead ends: 197 [2019-12-27 04:41:36,967 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 04:41:36,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-27 04:41:36,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 159. [2019-12-27 04:41:36,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-27 04:41:36,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 367 transitions. [2019-12-27 04:41:36,971 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 367 transitions. Word has length 14 [2019-12-27 04:41:36,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:36,971 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 367 transitions. [2019-12-27 04:41:36,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:36,971 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 367 transitions. [2019-12-27 04:41:36,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:36,972 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:36,972 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:37,174 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:37,174 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:37,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:37,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1460172101, now seen corresponding path program 81 times [2019-12-27 04:41:37,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:37,175 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712430982] [2019-12-27 04:41:37,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:37,280 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712430982] [2019-12-27 04:41:37,281 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720478610] [2019-12-27 04:41:37,281 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 [2019-12-27 04:41:37,326 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:41:37,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:37,327 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:37,327 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:37,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:37,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:37,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877312420] [2019-12-27 04:41:37,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:37,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:37,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:37,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:37,505 INFO L87 Difference]: Start difference. First operand 159 states and 367 transitions. Second operand 18 states. [2019-12-27 04:41:38,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:38,197 INFO L93 Difference]: Finished difference Result 229 states and 495 transitions. [2019-12-27 04:41:38,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:41:38,198 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:38,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:38,199 INFO L225 Difference]: With dead ends: 229 [2019-12-27 04:41:38,200 INFO L226 Difference]: Without dead ends: 222 [2019-12-27 04:41:38,200 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=386, Invalid=804, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 04:41:38,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-27 04:41:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 157. [2019-12-27 04:41:38,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 04:41:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 367 transitions. [2019-12-27 04:41:38,204 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 367 transitions. Word has length 14 [2019-12-27 04:41:38,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:38,204 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 367 transitions. [2019-12-27 04:41:38,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:38,204 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 367 transitions. [2019-12-27 04:41:38,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:38,204 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:38,205 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:38,405 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:38,405 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:38,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:38,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635791, now seen corresponding path program 82 times [2019-12-27 04:41:38,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:38,406 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815720313] [2019-12-27 04:41:38,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:38,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:38,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815720313] [2019-12-27 04:41:38,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394608841] [2019-12-27 04:41:38,528 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 [2019-12-27 04:41:38,574 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:41:38,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:38,575 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:38,576 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:39,154 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_239 Int)) (and (<= c_~i~0 (+ v_~i~0_239 c_~j~0)) (<= (div (+ (* v_~i~0_239 (- 1)) 1) (- 2)) 2) (<= c_~j~0 (+ v_~i~0_239 2)))) is different from true [2019-12-27 04:41:39,649 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_239 Int)) (and (<= c_~i~0 (+ v_~i~0_239 (* 2 c_~j~0))) (<= (div (+ (* v_~i~0_239 (- 1)) 1) (- 2)) 2) (<= c_~j~0 (+ v_~i~0_239 2)))) is different from true [2019-12-27 04:41:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2019-12-27 04:41:39,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:39,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:39,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438110389] [2019-12-27 04:41:39,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:39,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:39,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:39,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=181, Unknown=2, NotChecked=58, Total=306 [2019-12-27 04:41:39,715 INFO L87 Difference]: Start difference. First operand 157 states and 367 transitions. Second operand 18 states. [2019-12-27 04:41:40,356 WARN L192 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2019-12-27 04:41:40,939 WARN L192 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2019-12-27 04:41:41,698 WARN L192 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2019-12-27 04:41:43,117 WARN L192 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2019-12-27 04:41:43,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:43,141 INFO L93 Difference]: Finished difference Result 225 states and 492 transitions. [2019-12-27 04:41:43,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 04:41:43,142 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:43,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:43,143 INFO L225 Difference]: With dead ends: 225 [2019-12-27 04:41:43,144 INFO L226 Difference]: Without dead ends: 216 [2019-12-27 04:41:43,144 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=299, Invalid=762, Unknown=3, NotChecked=126, Total=1190 [2019-12-27 04:41:43,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-12-27 04:41:43,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2019-12-27 04:41:43,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-27 04:41:43,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 372 transitions. [2019-12-27 04:41:43,147 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 372 transitions. Word has length 14 [2019-12-27 04:41:43,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:43,148 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 372 transitions. [2019-12-27 04:41:43,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:43,148 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 372 transitions. [2019-12-27 04:41:43,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:43,148 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:43,148 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:43,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:43,352 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:43,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:43,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635946, now seen corresponding path program 83 times [2019-12-27 04:41:43,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:43,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144083023] [2019-12-27 04:41:43,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:43,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:43,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144083023] [2019-12-27 04:41:43,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237925049] [2019-12-27 04:41:43,460 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 [2019-12-27 04:41:43,504 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 04:41:43,504 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:43,505 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:43,506 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:52,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:52,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:52,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:52,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728600446] [2019-12-27 04:41:52,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:52,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:52,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:52,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:52,129 INFO L87 Difference]: Start difference. First operand 159 states and 372 transitions. Second operand 18 states. [2019-12-27 04:41:54,890 WARN L192 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-12-27 04:41:57,099 WARN L192 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-27 04:42:04,447 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-27 04:42:04,804 WARN L192 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2019-12-27 04:42:04,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:04,942 INFO L93 Difference]: Finished difference Result 250 states and 545 transitions. [2019-12-27 04:42:04,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 04:42:04,942 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:04,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:04,944 INFO L225 Difference]: With dead ends: 250 [2019-12-27 04:42:04,945 INFO L226 Difference]: Without dead ends: 247 [2019-12-27 04:42:04,945 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=367, Invalid=892, Unknown=1, NotChecked=0, Total=1260 [2019-12-27 04:42:04,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-12-27 04:42:04,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 159. [2019-12-27 04:42:04,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-27 04:42:04,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 372 transitions. [2019-12-27 04:42:04,948 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 372 transitions. Word has length 14 [2019-12-27 04:42:04,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:04,949 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 372 transitions. [2019-12-27 04:42:04,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:04,949 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 372 transitions. [2019-12-27 04:42:04,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:04,949 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:04,950 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:05,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:05,151 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:05,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:05,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640596, now seen corresponding path program 84 times [2019-12-27 04:42:05,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:05,152 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452186392] [2019-12-27 04:42:05,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:05,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452186392] [2019-12-27 04:42:05,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383858669] [2019-12-27 04:42:05,259 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 [2019-12-27 04:42:05,308 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:42:05,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:05,309 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:05,310 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:05,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:05,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:05,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910322005] [2019-12-27 04:42:05,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:05,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:05,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:05,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:05,791 INFO L87 Difference]: Start difference. First operand 159 states and 372 transitions. Second operand 18 states. [2019-12-27 04:42:06,423 WARN L192 SmtUtils]: Spent 475.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-27 04:42:09,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:09,173 INFO L93 Difference]: Finished difference Result 280 states and 613 transitions. [2019-12-27 04:42:09,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:42:09,174 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:09,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:09,176 INFO L225 Difference]: With dead ends: 280 [2019-12-27 04:42:09,176 INFO L226 Difference]: Without dead ends: 276 [2019-12-27 04:42:09,177 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=293, Invalid=699, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:42:09,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2019-12-27 04:42:09,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 170. [2019-12-27 04:42:09,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-12-27 04:42:09,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 410 transitions. [2019-12-27 04:42:09,182 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 410 transitions. Word has length 14 [2019-12-27 04:42:09,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:09,182 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 410 transitions. [2019-12-27 04:42:09,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:09,182 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 410 transitions. [2019-12-27 04:42:09,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:09,183 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:09,183 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:09,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:09,386 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:09,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:09,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640751, now seen corresponding path program 85 times [2019-12-27 04:42:09,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:09,387 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783655079] [2019-12-27 04:42:09,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:09,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783655079] [2019-12-27 04:42:09,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327229281] [2019-12-27 04:42:09,496 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 [2019-12-27 04:42:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:09,549 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:09,550 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:10,133 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_252 Int)) (and (<= c_~j~0 (+ v_~i~0_252 2)) (<= (div (+ (* v_~i~0_252 (- 1)) 1) (- 2)) 2) (<= c_~i~0 (+ c_~j~0 v_~i~0_252)))) is different from true [2019-12-27 04:42:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2019-12-27 04:42:10,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:10,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:10,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776876965] [2019-12-27 04:42:10,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:10,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:10,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:10,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=206, Unknown=1, NotChecked=30, Total=306 [2019-12-27 04:42:10,762 INFO L87 Difference]: Start difference. First operand 170 states and 410 transitions. Second operand 18 states. [2019-12-27 04:42:11,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:11,805 INFO L93 Difference]: Finished difference Result 275 states and 603 transitions. [2019-12-27 04:42:11,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 04:42:11,806 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:11,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:11,808 INFO L225 Difference]: With dead ends: 275 [2019-12-27 04:42:11,808 INFO L226 Difference]: Without dead ends: 270 [2019-12-27 04:42:11,808 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=329, Invalid=796, Unknown=1, NotChecked=64, Total=1190 [2019-12-27 04:42:11,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2019-12-27 04:42:11,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 168. [2019-12-27 04:42:11,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-12-27 04:42:11,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 404 transitions. [2019-12-27 04:42:11,812 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 404 transitions. Word has length 14 [2019-12-27 04:42:11,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:11,812 INFO L462 AbstractCegarLoop]: Abstraction has 168 states and 404 transitions. [2019-12-27 04:42:11,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:11,813 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 404 transitions. [2019-12-27 04:42:11,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:11,813 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:11,813 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:12,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:12,015 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:12,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:12,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784746, now seen corresponding path program 86 times [2019-12-27 04:42:12,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:12,016 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180462579] [2019-12-27 04:42:12,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:12,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:12,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180462579] [2019-12-27 04:42:12,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631457092] [2019-12-27 04:42:12,124 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 [2019-12-27 04:42:12,167 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:42:12,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:12,168 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:12,169 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:12,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:12,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:12,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135357203] [2019-12-27 04:42:12,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:12,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:12,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:12,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:12,434 INFO L87 Difference]: Start difference. First operand 168 states and 404 transitions. Second operand 18 states. [2019-12-27 04:42:13,887 WARN L192 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-27 04:42:14,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:14,143 INFO L93 Difference]: Finished difference Result 270 states and 594 transitions. [2019-12-27 04:42:14,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 04:42:14,143 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:14,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:14,145 INFO L225 Difference]: With dead ends: 270 [2019-12-27 04:42:14,145 INFO L226 Difference]: Without dead ends: 262 [2019-12-27 04:42:14,146 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=369, Invalid=891, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 04:42:14,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2019-12-27 04:42:14,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 171. [2019-12-27 04:42:14,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-12-27 04:42:14,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 412 transitions. [2019-12-27 04:42:14,151 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 412 transitions. Word has length 14 [2019-12-27 04:42:14,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:14,151 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 412 transitions. [2019-12-27 04:42:14,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:14,151 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 412 transitions. [2019-12-27 04:42:14,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:14,152 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:14,152 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:14,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:14,353 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:14,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:14,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784901, now seen corresponding path program 87 times [2019-12-27 04:42:14,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:14,354 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251618730] [2019-12-27 04:42:14,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:14,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251618730] [2019-12-27 04:42:14,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159474064] [2019-12-27 04:42:14,522 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 [2019-12-27 04:42:14,567 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 04:42:14,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:14,568 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:14,569 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:15,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:15,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:15,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513679509] [2019-12-27 04:42:15,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:15,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:15,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:15,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=230, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:42:15,544 INFO L87 Difference]: Start difference. First operand 171 states and 412 transitions. Second operand 18 states. [2019-12-27 04:42:16,340 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2019-12-27 04:42:17,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:17,445 INFO L93 Difference]: Finished difference Result 276 states and 610 transitions. [2019-12-27 04:42:17,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 04:42:17,446 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:17,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:17,448 INFO L225 Difference]: With dead ends: 276 [2019-12-27 04:42:17,448 INFO L226 Difference]: Without dead ends: 272 [2019-12-27 04:42:17,449 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=410, Invalid=921, Unknown=1, NotChecked=0, Total=1332 [2019-12-27 04:42:17,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2019-12-27 04:42:17,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 169. [2019-12-27 04:42:17,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-12-27 04:42:17,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 406 transitions. [2019-12-27 04:42:17,453 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 406 transitions. Word has length 14 [2019-12-27 04:42:17,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:17,453 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 406 transitions. [2019-12-27 04:42:17,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:17,453 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 406 transitions. [2019-12-27 04:42:17,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:17,454 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:17,454 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:17,654 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:17,655 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:17,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:17,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1603163941, now seen corresponding path program 88 times [2019-12-27 04:42:17,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:17,656 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239312562] [2019-12-27 04:42:17,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:17,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:17,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239312562] [2019-12-27 04:42:17,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379775303] [2019-12-27 04:42:17,786 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 [2019-12-27 04:42:17,828 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:42:17,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:17,828 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:17,829 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:17,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:17,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:17,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429536045] [2019-12-27 04:42:17,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:17,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:17,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:17,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:17,967 INFO L87 Difference]: Start difference. First operand 169 states and 406 transitions. Second operand 18 states. [2019-12-27 04:42:18,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:18,664 INFO L93 Difference]: Finished difference Result 231 states and 505 transitions. [2019-12-27 04:42:18,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 04:42:18,665 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:18,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:18,667 INFO L225 Difference]: With dead ends: 231 [2019-12-27 04:42:18,667 INFO L226 Difference]: Without dead ends: 219 [2019-12-27 04:42:18,668 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 [2019-12-27 04:42:18,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-12-27 04:42:18,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 171. [2019-12-27 04:42:18,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-12-27 04:42:18,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 408 transitions. [2019-12-27 04:42:18,672 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 408 transitions. Word has length 14 [2019-12-27 04:42:18,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:18,673 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 408 transitions. [2019-12-27 04:42:18,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:18,673 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 408 transitions. [2019-12-27 04:42:18,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:18,674 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:18,674 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:18,877 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:18,877 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:18,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:18,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1603164096, now seen corresponding path program 89 times [2019-12-27 04:42:18,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:18,878 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694570714] [2019-12-27 04:42:18,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:18,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694570714] [2019-12-27 04:42:18,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238403348] [2019-12-27 04:42:18,992 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 [2019-12-27 04:42:19,044 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 04:42:19,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:19,044 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:19,045 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:19,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:19,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:19,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:19,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769486607] [2019-12-27 04:42:19,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:19,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:19,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:19,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:19,193 INFO L87 Difference]: Start difference. First operand 171 states and 408 transitions. Second operand 18 states. [2019-12-27 04:42:19,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:19,929 INFO L93 Difference]: Finished difference Result 269 states and 586 transitions. [2019-12-27 04:42:19,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 04:42:19,930 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:19,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:19,932 INFO L225 Difference]: With dead ends: 269 [2019-12-27 04:42:19,932 INFO L226 Difference]: Without dead ends: 266 [2019-12-27 04:42:19,933 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=372, Invalid=960, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 04:42:19,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-12-27 04:42:19,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 171. [2019-12-27 04:42:19,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-12-27 04:42:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 408 transitions. [2019-12-27 04:42:19,938 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 408 transitions. Word has length 14 [2019-12-27 04:42:19,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:19,938 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 408 transitions. [2019-12-27 04:42:19,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:19,938 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 408 transitions. [2019-12-27 04:42:19,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:19,939 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:19,939 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:20,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:20,142 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:20,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:20,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1603168901, now seen corresponding path program 90 times [2019-12-27 04:42:20,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:20,143 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545555973] [2019-12-27 04:42:20,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:20,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:20,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545555973] [2019-12-27 04:42:20,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697014736] [2019-12-27 04:42:20,286 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 [2019-12-27 04:42:20,330 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:42:20,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:20,332 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:20,332 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:20,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:20,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:20,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890064594] [2019-12-27 04:42:20,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:20,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:20,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:20,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:20,491 INFO L87 Difference]: Start difference. First operand 171 states and 408 transitions. Second operand 18 states. [2019-12-27 04:42:21,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:21,224 INFO L93 Difference]: Finished difference Result 282 states and 615 transitions. [2019-12-27 04:42:21,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 04:42:21,225 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:21,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:21,227 INFO L225 Difference]: With dead ends: 282 [2019-12-27 04:42:21,227 INFO L226 Difference]: Without dead ends: 276 [2019-12-27 04:42:21,228 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 04:42:21,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2019-12-27 04:42:21,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 171. [2019-12-27 04:42:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-12-27 04:42:21,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 408 transitions. [2019-12-27 04:42:21,232 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 408 transitions. Word has length 14 [2019-12-27 04:42:21,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:21,232 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 408 transitions. [2019-12-27 04:42:21,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:21,233 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 408 transitions. [2019-12-27 04:42:21,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:21,233 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:21,233 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:21,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:21,435 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:21,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:21,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1603312896, now seen corresponding path program 91 times [2019-12-27 04:42:21,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:21,436 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340808293] [2019-12-27 04:42:21,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:21,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:21,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340808293] [2019-12-27 04:42:21,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465752462] [2019-12-27 04:42:21,543 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 [2019-12-27 04:42:21,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:21,588 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:21,588 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:21,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:21,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:21,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084025475] [2019-12-27 04:42:21,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:21,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:21,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:21,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:21,730 INFO L87 Difference]: Start difference. First operand 171 states and 408 transitions. Second operand 18 states. [2019-12-27 04:42:22,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:22,290 INFO L93 Difference]: Finished difference Result 275 states and 596 transitions. [2019-12-27 04:42:22,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 04:42:22,291 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:22,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:22,293 INFO L225 Difference]: With dead ends: 275 [2019-12-27 04:42:22,293 INFO L226 Difference]: Without dead ends: 270 [2019-12-27 04:42:22,293 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:42:22,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2019-12-27 04:42:22,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 173. [2019-12-27 04:42:22,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-12-27 04:42:22,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 414 transitions. [2019-12-27 04:42:22,298 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 414 transitions. Word has length 14 [2019-12-27 04:42:22,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:22,298 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 414 transitions. [2019-12-27 04:42:22,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:22,298 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 414 transitions. [2019-12-27 04:42:22,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:22,299 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:22,299 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:22,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:22,502 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:22,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:22,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1603313051, now seen corresponding path program 92 times [2019-12-27 04:42:22,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:22,503 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368703693] [2019-12-27 04:42:22,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:22,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:22,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368703693] [2019-12-27 04:42:22,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574235794] [2019-12-27 04:42:22,609 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 [2019-12-27 04:42:22,655 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:42:22,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:22,656 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:22,657 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:22,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:22,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:22,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013637164] [2019-12-27 04:42:22,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:22,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:22,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:22,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:22,796 INFO L87 Difference]: Start difference. First operand 173 states and 414 transitions. Second operand 18 states. [2019-12-27 04:42:23,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:23,234 INFO L93 Difference]: Finished difference Result 276 states and 607 transitions. [2019-12-27 04:42:23,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:42:23,235 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:23,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:23,236 INFO L225 Difference]: With dead ends: 276 [2019-12-27 04:42:23,236 INFO L226 Difference]: Without dead ends: 274 [2019-12-27 04:42:23,237 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 [2019-12-27 04:42:23,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-12-27 04:42:23,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 171. [2019-12-27 04:42:23,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-12-27 04:42:23,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 407 transitions. [2019-12-27 04:42:23,241 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 407 transitions. Word has length 14 [2019-12-27 04:42:23,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:23,241 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 407 transitions. [2019-12-27 04:42:23,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:23,242 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 407 transitions. [2019-12-27 04:42:23,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:23,242 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:23,242 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:23,445 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:23,446 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:23,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:23,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1603317701, now seen corresponding path program 93 times [2019-12-27 04:42:23,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:23,447 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557832513] [2019-12-27 04:42:23,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:23,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:23,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557832513] [2019-12-27 04:42:23,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727612972] [2019-12-27 04:42:23,563 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 [2019-12-27 04:42:23,610 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:42:23,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:23,611 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:23,611 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:23,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:23,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:23,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:23,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000066815] [2019-12-27 04:42:23,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:23,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:23,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:23,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:23,817 INFO L87 Difference]: Start difference. First operand 171 states and 407 transitions. Second operand 18 states. [2019-12-27 04:42:24,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:24,434 INFO L93 Difference]: Finished difference Result 278 states and 603 transitions. [2019-12-27 04:42:24,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 04:42:24,434 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:24,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:24,435 INFO L225 Difference]: With dead ends: 278 [2019-12-27 04:42:24,435 INFO L226 Difference]: Without dead ends: 275 [2019-12-27 04:42:24,436 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:42:24,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2019-12-27 04:42:24,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 170. [2019-12-27 04:42:24,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-12-27 04:42:24,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 408 transitions. [2019-12-27 04:42:24,440 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 408 transitions. Word has length 14 [2019-12-27 04:42:24,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:24,440 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 408 transitions. [2019-12-27 04:42:24,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:24,440 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 408 transitions. [2019-12-27 04:42:24,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:24,441 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:24,441 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:24,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:24,642 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:24,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:24,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1607781701, now seen corresponding path program 94 times [2019-12-27 04:42:24,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:24,643 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815674547] [2019-12-27 04:42:24,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:24,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815674547] [2019-12-27 04:42:24,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016413147] [2019-12-27 04:42:24,748 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 [2019-12-27 04:42:24,791 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:42:24,791 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:24,792 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:24,793 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:25,528 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_332 Int)) (and (<= c_~j~0 (+ c_~i~0 v_~j~0_332)) (<= (div (+ (* v_~j~0_332 (- 1)) 2) (- 2)) 3) (<= c_~i~0 (+ (* 2 v_~j~0_332) 3)))) is different from true [2019-12-27 04:42:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:25,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:25,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:25,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996329096] [2019-12-27 04:42:25,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:25,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:25,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:25,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=205, Unknown=1, NotChecked=30, Total=306 [2019-12-27 04:42:25,530 INFO L87 Difference]: Start difference. First operand 170 states and 408 transitions. Second operand 18 states. [2019-12-27 04:42:26,553 WARN L192 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2019-12-27 04:42:27,223 WARN L192 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2019-12-27 04:42:29,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:29,411 INFO L93 Difference]: Finished difference Result 256 states and 567 transitions. [2019-12-27 04:42:29,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 04:42:29,412 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:29,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:29,413 INFO L225 Difference]: With dead ends: 256 [2019-12-27 04:42:29,413 INFO L226 Difference]: Without dead ends: 255 [2019-12-27 04:42:29,413 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=353, Invalid=836, Unknown=5, NotChecked=66, Total=1260 [2019-12-27 04:42:29,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2019-12-27 04:42:29,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 165. [2019-12-27 04:42:29,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-12-27 04:42:29,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 394 transitions. [2019-12-27 04:42:29,418 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 394 transitions. Word has length 14 [2019-12-27 04:42:29,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:29,418 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 394 transitions. [2019-12-27 04:42:29,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:29,418 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 394 transitions. [2019-12-27 04:42:29,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:29,419 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:29,419 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:29,622 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:29,623 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:29,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:29,623 INFO L82 PathProgramCache]: Analyzing trace with hash -591203565, now seen corresponding path program 95 times [2019-12-27 04:42:29,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:29,623 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21514564] [2019-12-27 04:42:29,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:29,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21514564] [2019-12-27 04:42:29,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966169106] [2019-12-27 04:42:29,729 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 [2019-12-27 04:42:29,772 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:42:29,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:29,774 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:29,775 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:29,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:29,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:29,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721831337] [2019-12-27 04:42:29,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:29,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:29,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:29,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:29,954 INFO L87 Difference]: Start difference. First operand 165 states and 394 transitions. Second operand 18 states. [2019-12-27 04:42:30,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:30,489 INFO L93 Difference]: Finished difference Result 196 states and 442 transitions. [2019-12-27 04:42:30,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:42:30,495 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:30,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:30,495 INFO L225 Difference]: With dead ends: 196 [2019-12-27 04:42:30,496 INFO L226 Difference]: Without dead ends: 194 [2019-12-27 04:42:30,496 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 [2019-12-27 04:42:30,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-12-27 04:42:30,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 165. [2019-12-27 04:42:30,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-12-27 04:42:30,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 394 transitions. [2019-12-27 04:42:30,498 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 394 transitions. Word has length 14 [2019-12-27 04:42:30,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:30,499 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 394 transitions. [2019-12-27 04:42:30,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:30,499 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 394 transitions. [2019-12-27 04:42:30,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:30,499 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:30,499 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:30,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:30,700 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:30,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:30,700 INFO L82 PathProgramCache]: Analyzing trace with hash -591347715, now seen corresponding path program 96 times [2019-12-27 04:42:30,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:30,701 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046354106] [2019-12-27 04:42:30,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:30,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046354106] [2019-12-27 04:42:30,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876558773] [2019-12-27 04:42:30,835 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 [2019-12-27 04:42:30,877 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:42:30,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:30,878 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:30,879 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:33,110 WARN L192 SmtUtils]: Spent 560.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-27 04:42:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:33,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:33,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:33,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907418155] [2019-12-27 04:42:33,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:33,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:33,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:33,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=232, Unknown=2, NotChecked=0, Total=306 [2019-12-27 04:42:33,178 INFO L87 Difference]: Start difference. First operand 165 states and 394 transitions. Second operand 18 states. [2019-12-27 04:42:34,596 WARN L192 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-27 04:42:35,225 WARN L192 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-12-27 04:42:35,765 WARN L192 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-12-27 04:42:35,957 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-12-27 04:42:36,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:36,041 INFO L93 Difference]: Finished difference Result 217 states and 482 transitions. [2019-12-27 04:42:36,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:42:36,042 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:36,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:36,043 INFO L225 Difference]: With dead ends: 217 [2019-12-27 04:42:36,043 INFO L226 Difference]: Without dead ends: 215 [2019-12-27 04:42:36,043 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=301, Invalid=689, Unknown=2, NotChecked=0, Total=992 [2019-12-27 04:42:36,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-27 04:42:36,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 162. [2019-12-27 04:42:36,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-27 04:42:36,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 388 transitions. [2019-12-27 04:42:36,047 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 388 transitions. Word has length 14 [2019-12-27 04:42:36,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:36,047 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 388 transitions. [2019-12-27 04:42:36,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:36,047 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 388 transitions. [2019-12-27 04:42:36,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:36,048 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:36,048 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:36,248 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:36,249 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:36,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:36,249 INFO L82 PathProgramCache]: Analyzing trace with hash -591352365, now seen corresponding path program 97 times [2019-12-27 04:42:36,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:36,250 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281770521] [2019-12-27 04:42:36,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:36,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281770521] [2019-12-27 04:42:36,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546766794] [2019-12-27 04:42:36,350 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 [2019-12-27 04:42:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:36,400 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:36,400 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:36,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:36,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:36,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853857799] [2019-12-27 04:42:36,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:36,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:36,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:36,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:36,612 INFO L87 Difference]: Start difference. First operand 162 states and 388 transitions. Second operand 18 states. [2019-12-27 04:42:37,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:37,288 INFO L93 Difference]: Finished difference Result 210 states and 466 transitions. [2019-12-27 04:42:37,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:42:37,288 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:37,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:37,289 INFO L225 Difference]: With dead ends: 210 [2019-12-27 04:42:37,290 INFO L226 Difference]: Without dead ends: 207 [2019-12-27 04:42:37,290 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:42:37,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-27 04:42:37,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 162. [2019-12-27 04:42:37,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-27 04:42:37,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 388 transitions. [2019-12-27 04:42:37,294 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 388 transitions. Word has length 14 [2019-12-27 04:42:37,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:37,294 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 388 transitions. [2019-12-27 04:42:37,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:37,294 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 388 transitions. [2019-12-27 04:42:37,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:37,295 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:37,295 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:37,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:37,496 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:37,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:37,496 INFO L82 PathProgramCache]: Analyzing trace with hash -595969970, now seen corresponding path program 98 times [2019-12-27 04:42:37,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:37,497 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037693784] [2019-12-27 04:42:37,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:37,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037693784] [2019-12-27 04:42:37,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198952428] [2019-12-27 04:42:37,610 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 [2019-12-27 04:42:37,655 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:42:37,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:37,656 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:37,657 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:37,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:37,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:37,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7283754] [2019-12-27 04:42:37,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:37,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:37,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:37,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:37,870 INFO L87 Difference]: Start difference. First operand 162 states and 388 transitions. Second operand 18 states. [2019-12-27 04:42:38,670 WARN L192 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2019-12-27 04:42:39,289 WARN L192 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 23 [2019-12-27 04:42:39,599 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-27 04:42:39,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:39,825 INFO L93 Difference]: Finished difference Result 231 states and 509 transitions. [2019-12-27 04:42:39,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:42:39,826 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:39,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:39,827 INFO L225 Difference]: With dead ends: 231 [2019-12-27 04:42:39,827 INFO L226 Difference]: Without dead ends: 229 [2019-12-27 04:42:39,828 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=769, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:42:39,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-12-27 04:42:39,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 160. [2019-12-27 04:42:39,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-12-27 04:42:39,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 381 transitions. [2019-12-27 04:42:39,832 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 381 transitions. Word has length 14 [2019-12-27 04:42:39,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:39,832 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 381 transitions. [2019-12-27 04:42:39,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:39,832 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 381 transitions. [2019-12-27 04:42:39,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:39,832 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:39,832 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:40,033 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:40,033 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:40,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:40,034 INFO L82 PathProgramCache]: Analyzing trace with hash -734498275, now seen corresponding path program 99 times [2019-12-27 04:42:40,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:40,034 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014328576] [2019-12-27 04:42:40,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:40,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:40,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014328576] [2019-12-27 04:42:40,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072489845] [2019-12-27 04:42:40,138 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 [2019-12-27 04:42:40,183 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:42:40,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:40,184 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:40,184 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:40,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:40,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:40,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:40,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102567096] [2019-12-27 04:42:40,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:40,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:40,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:40,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:40,485 INFO L87 Difference]: Start difference. First operand 160 states and 381 transitions. Second operand 18 states. [2019-12-27 04:42:42,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:42,189 INFO L93 Difference]: Finished difference Result 227 states and 495 transitions. [2019-12-27 04:42:42,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 04:42:42,190 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:42,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:42,191 INFO L225 Difference]: With dead ends: 227 [2019-12-27 04:42:42,191 INFO L226 Difference]: Without dead ends: 216 [2019-12-27 04:42:42,192 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=415, Invalid=1067, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 04:42:42,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-12-27 04:42:42,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 155. [2019-12-27 04:42:42,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-27 04:42:42,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 361 transitions. [2019-12-27 04:42:42,195 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 361 transitions. Word has length 14 [2019-12-27 04:42:42,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:42,195 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 361 transitions. [2019-12-27 04:42:42,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:42,195 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 361 transitions. [2019-12-27 04:42:42,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:42,195 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:42,196 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:42,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:42,396 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:42,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:42,397 INFO L82 PathProgramCache]: Analyzing trace with hash -733754519, now seen corresponding path program 100 times [2019-12-27 04:42:42,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:42,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668625000] [2019-12-27 04:42:42,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:42,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668625000] [2019-12-27 04:42:42,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304382287] [2019-12-27 04:42:42,510 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 [2019-12-27 04:42:42,553 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:42:42,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:42,554 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:42,554 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:44,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:44,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:44,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294809738] [2019-12-27 04:42:44,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:44,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:44,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:44,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=230, Unknown=2, NotChecked=0, Total=306 [2019-12-27 04:42:44,965 INFO L87 Difference]: Start difference. First operand 155 states and 361 transitions. Second operand 18 states. [2019-12-27 04:42:47,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:47,981 INFO L93 Difference]: Finished difference Result 229 states and 491 transitions. [2019-12-27 04:42:47,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 04:42:47,981 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:47,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:47,982 INFO L225 Difference]: With dead ends: 229 [2019-12-27 04:42:47,983 INFO L226 Difference]: Without dead ends: 226 [2019-12-27 04:42:47,983 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=364, Invalid=893, Unknown=3, NotChecked=0, Total=1260 [2019-12-27 04:42:47,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-27 04:42:47,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 152. [2019-12-27 04:42:47,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 04:42:47,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 351 transitions. [2019-12-27 04:42:47,986 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 351 transitions. Word has length 14 [2019-12-27 04:42:47,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:47,987 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 351 transitions. [2019-12-27 04:42:47,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:47,987 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 351 transitions. [2019-12-27 04:42:47,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:47,987 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:47,987 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:48,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:48,191 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:48,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:48,191 INFO L82 PathProgramCache]: Analyzing trace with hash -738367319, now seen corresponding path program 101 times [2019-12-27 04:42:48,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:48,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521459059] [2019-12-27 04:42:48,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:48,297 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:48,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521459059] [2019-12-27 04:42:48,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735524708] [2019-12-27 04:42:48,298 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 [2019-12-27 04:42:48,342 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:42:48,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:48,343 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:48,343 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:48,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:48,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:48,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942053862] [2019-12-27 04:42:48,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:48,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:48,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:48,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:48,485 INFO L87 Difference]: Start difference. First operand 152 states and 351 transitions. Second operand 18 states. [2019-12-27 04:42:49,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:49,051 INFO L93 Difference]: Finished difference Result 222 states and 471 transitions. [2019-12-27 04:42:49,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 04:42:49,052 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:49,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:49,053 INFO L225 Difference]: With dead ends: 222 [2019-12-27 04:42:49,053 INFO L226 Difference]: Without dead ends: 216 [2019-12-27 04:42:49,053 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 [2019-12-27 04:42:49,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-12-27 04:42:49,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 148. [2019-12-27 04:42:49,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 04:42:49,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 336 transitions. [2019-12-27 04:42:49,057 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 336 transitions. Word has length 14 [2019-12-27 04:42:49,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:49,057 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 336 transitions. [2019-12-27 04:42:49,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:49,058 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 336 transitions. [2019-12-27 04:42:49,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:49,058 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:49,058 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:49,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:49,259 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:49,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:49,259 INFO L82 PathProgramCache]: Analyzing trace with hash -738367474, now seen corresponding path program 102 times [2019-12-27 04:42:49,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:49,260 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294745449] [2019-12-27 04:42:49,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:49,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:49,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:49,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294745449] [2019-12-27 04:42:49,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643025124] [2019-12-27 04:42:49,379 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 [2019-12-27 04:42:49,423 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:42:49,424 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:49,424 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:49,425 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:49,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:49,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:49,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991485148] [2019-12-27 04:42:49,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:49,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:49,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:49,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:49,571 INFO L87 Difference]: Start difference. First operand 148 states and 336 transitions. Second operand 18 states. [2019-12-27 04:42:50,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:50,184 INFO L93 Difference]: Finished difference Result 237 states and 503 transitions. [2019-12-27 04:42:50,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 04:42:50,184 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:50,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:50,185 INFO L225 Difference]: With dead ends: 237 [2019-12-27 04:42:50,186 INFO L226 Difference]: Without dead ends: 236 [2019-12-27 04:42:50,186 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 [2019-12-27 04:42:50,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-12-27 04:42:50,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 147. [2019-12-27 04:42:50,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 04:42:50,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 333 transitions. [2019-12-27 04:42:50,190 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 333 transitions. Word has length 14 [2019-12-27 04:42:50,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:50,190 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 333 transitions. [2019-12-27 04:42:50,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:50,190 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 333 transitions. [2019-12-27 04:42:50,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:50,191 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:50,191 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:50,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:50,392 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:50,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:50,392 INFO L82 PathProgramCache]: Analyzing trace with hash -738372124, now seen corresponding path program 103 times [2019-12-27 04:42:50,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:50,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681634328] [2019-12-27 04:42:50,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:50,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681634328] [2019-12-27 04:42:50,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309343460] [2019-12-27 04:42:50,510 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 [2019-12-27 04:42:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:50,554 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:50,555 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:50,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:50,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:50,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933568712] [2019-12-27 04:42:50,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:50,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:50,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:50,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:50,696 INFO L87 Difference]: Start difference. First operand 147 states and 333 transitions. Second operand 18 states. [2019-12-27 04:42:51,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:51,126 INFO L93 Difference]: Finished difference Result 245 states and 516 transitions. [2019-12-27 04:42:51,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:42:51,127 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:51,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:51,128 INFO L225 Difference]: With dead ends: 245 [2019-12-27 04:42:51,128 INFO L226 Difference]: Without dead ends: 243 [2019-12-27 04:42:51,129 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 [2019-12-27 04:42:51,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-27 04:42:51,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 147. [2019-12-27 04:42:51,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 04:42:51,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 333 transitions. [2019-12-27 04:42:51,132 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 333 transitions. Word has length 14 [2019-12-27 04:42:51,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:51,133 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 333 transitions. [2019-12-27 04:42:51,133 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:51,133 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 333 transitions. [2019-12-27 04:42:51,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:51,133 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:51,133 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:51,334 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:51,334 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:51,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:51,335 INFO L82 PathProgramCache]: Analyzing trace with hash -738372279, now seen corresponding path program 104 times [2019-12-27 04:42:51,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:51,335 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039803984] [2019-12-27 04:42:51,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:51,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039803984] [2019-12-27 04:42:51,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614638959] [2019-12-27 04:42:51,438 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 [2019-12-27 04:42:51,490 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:42:51,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:51,491 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:51,492 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:51,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:51,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:51,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341616275] [2019-12-27 04:42:51,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:51,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:51,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:51,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:51,627 INFO L87 Difference]: Start difference. First operand 147 states and 333 transitions. Second operand 18 states. [2019-12-27 04:42:52,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:52,190 INFO L93 Difference]: Finished difference Result 248 states and 521 transitions. [2019-12-27 04:42:52,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 04:42:52,191 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:52,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:52,192 INFO L225 Difference]: With dead ends: 248 [2019-12-27 04:42:52,192 INFO L226 Difference]: Without dead ends: 239 [2019-12-27 04:42:52,192 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:42:52,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-12-27 04:42:52,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 145. [2019-12-27 04:42:52,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 04:42:52,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 323 transitions. [2019-12-27 04:42:52,196 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 323 transitions. Word has length 14 [2019-12-27 04:42:52,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:52,196 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 323 transitions. [2019-12-27 04:42:52,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:52,196 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 323 transitions. [2019-12-27 04:42:52,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:52,197 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:52,197 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:52,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:52,398 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:52,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:52,399 INFO L82 PathProgramCache]: Analyzing trace with hash -738516274, now seen corresponding path program 105 times [2019-12-27 04:42:52,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:52,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641666704] [2019-12-27 04:42:52,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:52,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641666704] [2019-12-27 04:42:52,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098621414] [2019-12-27 04:42:52,511 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 [2019-12-27 04:42:52,558 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:42:52,559 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:52,560 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:52,561 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:52,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:52,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:52,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:52,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825601257] [2019-12-27 04:42:52,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:52,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:52,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:52,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:52,712 INFO L87 Difference]: Start difference. First operand 145 states and 323 transitions. Second operand 18 states. [2019-12-27 04:42:53,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:53,450 INFO L93 Difference]: Finished difference Result 231 states and 487 transitions. [2019-12-27 04:42:53,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 04:42:53,450 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:53,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:53,451 INFO L225 Difference]: With dead ends: 231 [2019-12-27 04:42:53,451 INFO L226 Difference]: Without dead ends: 229 [2019-12-27 04:42:53,452 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 04:42:53,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-12-27 04:42:53,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 144. [2019-12-27 04:42:53,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 04:42:53,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 319 transitions. [2019-12-27 04:42:53,455 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 319 transitions. Word has length 14 [2019-12-27 04:42:53,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:53,456 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 319 transitions. [2019-12-27 04:42:53,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:53,456 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 319 transitions. [2019-12-27 04:42:53,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:53,456 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:53,456 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:53,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:53,657 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:53,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:53,657 INFO L82 PathProgramCache]: Analyzing trace with hash -738516429, now seen corresponding path program 106 times [2019-12-27 04:42:53,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:53,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754842201] [2019-12-27 04:42:53,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:53,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754842201] [2019-12-27 04:42:53,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259324746] [2019-12-27 04:42:53,766 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 [2019-12-27 04:42:53,812 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:42:53,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:53,813 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:53,814 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:55,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:55,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:55,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278349687] [2019-12-27 04:42:55,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:55,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:55,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:55,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=229, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:42:55,571 INFO L87 Difference]: Start difference. First operand 144 states and 319 transitions. Second operand 18 states. [2019-12-27 04:43:00,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:43:00,809 INFO L93 Difference]: Finished difference Result 235 states and 487 transitions. [2019-12-27 04:43:00,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 04:43:00,810 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:43:00,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:43:00,811 INFO L225 Difference]: With dead ends: 235 [2019-12-27 04:43:00,811 INFO L226 Difference]: Without dead ends: 231 [2019-12-27 04:43:00,812 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=353, Invalid=831, Unknown=6, NotChecked=0, Total=1190 [2019-12-27 04:43:00,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-12-27 04:43:00,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 138. [2019-12-27 04:43:00,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 04:43:00,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 299 transitions. [2019-12-27 04:43:00,815 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 299 transitions. Word has length 14 [2019-12-27 04:43:00,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:43:00,815 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 299 transitions. [2019-12-27 04:43:00,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:43:00,815 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 299 transitions. [2019-12-27 04:43:00,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:43:00,815 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:43:00,815 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:43:01,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:43:01,016 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:43:01,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:43:01,017 INFO L82 PathProgramCache]: Analyzing trace with hash -876900274, now seen corresponding path program 107 times [2019-12-27 04:43:01,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:43:01,017 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776218837] [2019-12-27 04:43:01,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:43:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:43:01,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:43:01,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776218837] [2019-12-27 04:43:01,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518795678] [2019-12-27 04:43:01,126 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 [2019-12-27 04:43:01,169 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 04:43:01,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:43:01,171 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:43:01,171 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:43:01,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:43:01,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:43:01,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:43:01,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411506559] [2019-12-27 04:43:01,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:43:01,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:43:01,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:43:01,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=230, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:43:01,973 INFO L87 Difference]: Start difference. First operand 138 states and 299 transitions. Second operand 18 states. [2019-12-27 04:43:03,210 WARN L192 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-27 04:43:04,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:43:04,313 INFO L93 Difference]: Finished difference Result 228 states and 467 transitions. [2019-12-27 04:43:04,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 04:43:04,314 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:43:04,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:43:04,315 INFO L225 Difference]: With dead ends: 228 [2019-12-27 04:43:04,315 INFO L226 Difference]: Without dead ends: 227 [2019-12-27 04:43:04,315 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=410, Invalid=920, Unknown=2, NotChecked=0, Total=1332 [2019-12-27 04:43:04,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-27 04:43:04,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 134. [2019-12-27 04:43:04,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 04:43:04,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 283 transitions. [2019-12-27 04:43:04,319 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 283 transitions. Word has length 14 [2019-12-27 04:43:04,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:43:04,319 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 283 transitions. [2019-12-27 04:43:04,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:43:04,319 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 283 transitions. [2019-12-27 04:43:04,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:43:04,320 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:43:04,320 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:43:04,520 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:43:04,520 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:43:04,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:43:04,521 INFO L82 PathProgramCache]: Analyzing trace with hash -877049384, now seen corresponding path program 108 times [2019-12-27 04:43:04,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:43:04,526 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448055939] [2019-12-27 04:43:04,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:43:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:43:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:43:04,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448055939] [2019-12-27 04:43:04,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655928665] [2019-12-27 04:43:04,650 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 [2019-12-27 04:43:04,699 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:43:04,699 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:43:04,699 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:43:04,700 INFO L287 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2019-12-27 04:43:07,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:43:07,615 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-27 04:43:07,620 WARN L227 ceAbstractionStarter]: Timeout [2019-12-27 04:43:07,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 04:43:07 BasicIcfg [2019-12-27 04:43:07,621 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-27 04:43:07,622 INFO L168 Benchmark]: Toolchain (without parser) took 285019.55 ms. Allocated memory was 136.8 MB in the beginning and 209.2 MB in the end (delta: 72.4 MB). Free memory was 100.3 MB in the beginning and 149.8 MB in the end (delta: -49.6 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. [2019-12-27 04:43:07,622 INFO L168 Benchmark]: CDTParser took 0.45 ms. Allocated memory is still 136.8 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-12-27 04:43:07,622 INFO L168 Benchmark]: CACSL2BoogieTranslator took 688.25 ms. Allocated memory was 136.8 MB in the beginning and 202.9 MB in the end (delta: 66.1 MB). Free memory was 99.9 MB in the beginning and 162.1 MB in the end (delta: -62.3 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. [2019-12-27 04:43:07,623 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.25 ms. Allocated memory is still 202.9 MB. Free memory was 162.1 MB in the beginning and 160.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-12-27 04:43:07,623 INFO L168 Benchmark]: Boogie Preprocessor took 30.14 ms. Allocated memory is still 202.9 MB. Free memory was 160.1 MB in the beginning and 158.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2019-12-27 04:43:07,623 INFO L168 Benchmark]: RCFGBuilder took 382.50 ms. Allocated memory is still 202.9 MB. Free memory was 158.7 MB in the beginning and 139.2 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2019-12-27 04:43:07,624 INFO L168 Benchmark]: TraceAbstraction took 283863.98 ms. Allocated memory was 202.9 MB in the beginning and 209.2 MB in the end (delta: 6.3 MB). Free memory was 138.5 MB in the beginning and 149.8 MB in the end (delta: -11.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-12-27 04:43:07,626 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45 ms. Allocated memory is still 136.8 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 688.25 ms. Allocated memory was 136.8 MB in the beginning and 202.9 MB in the end (delta: 66.1 MB). Free memory was 99.9 MB in the beginning and 162.1 MB in the end (delta: -62.3 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 49.25 ms. Allocated memory is still 202.9 MB. Free memory was 162.1 MB in the beginning and 160.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.14 ms. Allocated memory is still 202.9 MB. Free memory was 160.1 MB in the beginning and 158.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 382.50 ms. Allocated memory is still 202.9 MB. Free memory was 158.7 MB in the beginning and 139.2 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 283863.98 ms. Allocated memory was 202.9 MB in the beginning and 209.2 MB in the end (delta: 6.3 MB). Free memory was 138.5 MB in the beginning and 149.8 MB in the end (delta: -11.4 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 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 analyzing trace of length 15 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 17 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 283.7s, OverallIterations: 121, TraceHistogramMax: 6, AutomataDifference: 149.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1299 SDtfs, 16765 SDslu, 10668 SDs, 0 SdLazy, 6537 SolverSat, 4135 SolverUnsat, 22 SolverUnknown, 0 SolverNotchecked, 40.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3541 GetRequests, 568 SyntacticMatches, 15 SemanticMatches, 2958 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 18058 ImplicationChecksByTransitivity, 202.0s 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, 120 MinimizatonAttempts, 6143 StatesRemovedByMinimization, 117 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 98.3s InterpolantComputationTime, 2983 NumberOfCodeBlocks, 2983 NumberOfCodeBlocksAsserted, 386 NumberOfCheckSat, 2748 ConstructedInterpolants, 113 QuantifiedInterpolants, 418199 SizeOfPredicates, 0 NumberOfNonLiveVariables, 10690 ConjunctsInSsa, 1247 ConjunctsInUnsatCore, 235 InterpolantComputations, 7 PerfectInterpolantSequences, 30/1702 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