/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 12:17:18,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 12:17:18,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 12:17:18,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 12:17:18,356 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 12:17:18,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 12:17:18,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 12:17:18,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 12:17:18,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 12:17:18,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 12:17:18,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 12:17:18,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 12:17:18,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 12:17:18,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 12:17:18,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 12:17:18,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 12:17:18,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 12:17:18,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 12:17:18,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 12:17:18,372 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 12:17:18,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 12:17:18,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 12:17:18,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 12:17:18,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 12:17:18,379 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 12:17:18,382 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 12:17:18,383 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 12:17:18,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 12:17:18,384 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 12:17:18,385 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 12:17:18,385 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 12:17:18,386 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 12:17:18,386 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 12:17:18,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 12:17:18,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 12:17:18,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 12:17:18,389 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-10-16 12:17:18,411 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 12:17:18,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 12:17:18,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 12:17:18,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 12:17:18,413 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 12:17:18,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 12:17:18,414 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 12:17:18,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 12:17:18,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 12:17:18,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 12:17:18,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 12:17:18,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 12:17:18,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 12:17:18,415 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 12:17:18,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 12:17:18,415 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 12:17:18,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 12:17:18,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 12:17:18,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 12:17:18,416 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 12:17:18,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 12:17:18,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 12:17:18,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 12:17:18,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-16 12:17:18,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 12:17:18,418 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 12:17:18,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 12:17:18,418 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-16 12:17:18,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 12:17:18,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 12:17:18,716 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 12:17:18,720 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 12:17:18,721 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 12:17:18,722 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 12:17:18,722 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-10-16 12:17:18,794 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b19773eb/076a540f5ab24eb8a127a087767942d0/FLAGb5917f9ca [2020-10-16 12:17:19,429 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 12:17:19,429 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-10-16 12:17:19,455 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b19773eb/076a540f5ab24eb8a127a087767942d0/FLAGb5917f9ca [2020-10-16 12:17:19,637 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b19773eb/076a540f5ab24eb8a127a087767942d0 [2020-10-16 12:17:19,646 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 12:17:19,648 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 12:17:19,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 12:17:19,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 12:17:19,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 12:17:19,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:17:19" (1/1) ... [2020-10-16 12:17:19,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c95556b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:17:19, skipping insertion in model container [2020-10-16 12:17:19,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:17:19" (1/1) ... [2020-10-16 12:17:19,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 12:17:19,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 12:17:20,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 12:17:20,469 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 12:17:20,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 12:17:20,824 INFO L208 MainTranslator]: Completed translation [2020-10-16 12:17:20,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:17:20 WrapperNode [2020-10-16 12:17:20,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 12:17:20,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 12:17:20,828 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 12:17:20,828 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 12:17:20,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:17:20" (1/1) ... [2020-10-16 12:17:20,865 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:17:20" (1/1) ... [2020-10-16 12:17:20,891 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 12:17:20,891 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 12:17:20,891 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 12:17:20,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 12:17:20,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:17:20" (1/1) ... [2020-10-16 12:17:20,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:17:20" (1/1) ... [2020-10-16 12:17:20,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:17:20" (1/1) ... [2020-10-16 12:17:20,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:17:20" (1/1) ... [2020-10-16 12:17:20,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:17:20" (1/1) ... [2020-10-16 12:17:20,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:17:20" (1/1) ... [2020-10-16 12:17:20,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:17:20" (1/1) ... [2020-10-16 12:17:20,940 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 12:17:20,941 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 12:17:20,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 12:17:20,941 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 12:17:20,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:17:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 12:17:21,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 12:17:21,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 12:17:21,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-16 12:17:21,008 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2020-10-16 12:17:21,008 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2020-10-16 12:17:21,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 12:17:21,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 12:17:21,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 12:17:21,011 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 12:17:21,442 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 12:17:21,442 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-16 12:17:21,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:17:21 BoogieIcfgContainer [2020-10-16 12:17:21,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 12:17:21,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 12:17:21,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 12:17:21,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 12:17:21,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 12:17:19" (1/3) ... [2020-10-16 12:17:21,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37028ff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:17:21, skipping insertion in model container [2020-10-16 12:17:21,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:17:20" (2/3) ... [2020-10-16 12:17:21,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37028ff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:17:21, skipping insertion in model container [2020-10-16 12:17:21,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:17:21" (3/3) ... [2020-10-16 12:17:21,459 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2020-10-16 12:17:21,471 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 12:17:21,471 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-16 12:17:21,479 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 12:17:21,480 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 12:17:21,505 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,506 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,506 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,506 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,506 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,507 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,507 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,507 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,507 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,508 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,508 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,508 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,508 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,509 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,509 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,509 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,509 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,509 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,510 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,510 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,510 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,514 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,514 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,514 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,515 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,515 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,515 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,515 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,515 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:17:21,526 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2020-10-16 12:17:21,540 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 12:17:21,562 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 12:17:21,562 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 12:17:21,562 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 12:17:21,562 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 12:17:21,562 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 12:17:21,563 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 12:17:21,563 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 12:17:21,563 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 12:17:21,577 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 12:17:21,578 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 85 transitions, 178 flow [2020-10-16 12:17:21,581 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 82 places, 85 transitions, 178 flow [2020-10-16 12:17:21,583 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions, 178 flow [2020-10-16 12:17:21,632 INFO L129 PetriNetUnfolder]: 7/84 cut-off events. [2020-10-16 12:17:21,633 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 12:17:21,638 INFO L80 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 84 events. 7/84 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-10-16 12:17:21,642 INFO L117 LiptonReduction]: Number of co-enabled transitions 640 [2020-10-16 12:17:22,991 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-16 12:17:23,190 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-16 12:17:23,712 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-16 12:17:24,015 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-16 12:17:24,501 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-16 12:17:24,886 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-16 12:17:26,255 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 149 DAG size of output: 131 [2020-10-16 12:17:26,885 WARN L193 SmtUtils]: Spent 618.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-16 12:17:26,888 INFO L132 LiptonReduction]: Checked pairs total: 580 [2020-10-16 12:17:26,888 INFO L134 LiptonReduction]: Total number of compositions: 83 [2020-10-16 12:17:26,895 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 15 places, 13 transitions, 34 flow [2020-10-16 12:17:26,904 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 17 states. [2020-10-16 12:17:26,907 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-16 12:17:26,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 12:17:26,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:17:26,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:17:26,914 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:17:26,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:17:26,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1450466956, now seen corresponding path program 1 times [2020-10-16 12:17:26,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:17:26,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005623303] [2020-10-16 12:17:26,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:17:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:17:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:17:27,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005623303] [2020-10-16 12:17:27,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:17:27,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:17:27,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518189404] [2020-10-16 12:17:27,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 12:17:27,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:17:27,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 12:17:27,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:17:27,164 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-10-16 12:17:27,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:17:27,208 INFO L93 Difference]: Finished difference Result 20 states and 36 transitions. [2020-10-16 12:17:27,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 12:17:27,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-10-16 12:17:27,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:17:27,221 INFO L225 Difference]: With dead ends: 20 [2020-10-16 12:17:27,222 INFO L226 Difference]: Without dead ends: 20 [2020-10-16 12:17:27,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:17:27,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-16 12:17:27,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-16 12:17:27,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 12:17:27,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 36 transitions. [2020-10-16 12:17:27,268 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 36 transitions. Word has length 8 [2020-10-16 12:17:27,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:17:27,268 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 36 transitions. [2020-10-16 12:17:27,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 12:17:27,269 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 36 transitions. [2020-10-16 12:17:27,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 12:17:27,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:17:27,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:17:27,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 12:17:27,271 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:17:27,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:17:27,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1984436175, now seen corresponding path program 1 times [2020-10-16 12:17:27,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:17:27,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651906377] [2020-10-16 12:17:27,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:17:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:17:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:17:27,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651906377] [2020-10-16 12:17:27,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448271643] [2020-10-16 12:17:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:17:27,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-16 12:17:27,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:17:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:17:27,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 12:17:27,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-10-16 12:17:27,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919968400] [2020-10-16 12:17:27,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 12:17:27,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:17:27,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 12:17:27,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 12:17:27,525 INFO L87 Difference]: Start difference. First operand 20 states and 36 transitions. Second operand 3 states. [2020-10-16 12:17:27,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:17:27,537 INFO L93 Difference]: Finished difference Result 28 states and 52 transitions. [2020-10-16 12:17:27,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 12:17:27,538 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-16 12:17:27,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:17:27,539 INFO L225 Difference]: With dead ends: 28 [2020-10-16 12:17:27,540 INFO L226 Difference]: Without dead ends: 28 [2020-10-16 12:17:27,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 12:17:27,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-16 12:17:27,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-10-16 12:17:27,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-16 12:17:27,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 44 transitions. [2020-10-16 12:17:27,547 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 44 transitions. Word has length 9 [2020-10-16 12:17:27,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:17:27,547 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 44 transitions. [2020-10-16 12:17:27,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 12:17:27,548 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 44 transitions. [2020-10-16 12:17:27,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 12:17:27,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:17:27,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:17:27,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-16 12:17:27,763 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:17:27,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:17:27,764 INFO L82 PathProgramCache]: Analyzing trace with hash -436238306, now seen corresponding path program 1 times [2020-10-16 12:17:27,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:17:27,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223136985] [2020-10-16 12:17:27,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:17:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:17:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:17:27,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223136985] [2020-10-16 12:17:27,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159428483] [2020-10-16 12:17:27,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:27,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:17:27,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-16 12:17:27,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:17:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:17:27,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:17:27,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-16 12:17:27,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217714705] [2020-10-16 12:17:27,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 12:17:27,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:17:27,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 12:17:27,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-16 12:17:27,963 INFO L87 Difference]: Start difference. First operand 24 states and 44 transitions. Second operand 6 states. [2020-10-16 12:17:28,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:17:28,071 INFO L93 Difference]: Finished difference Result 44 states and 84 transitions. [2020-10-16 12:17:28,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 12:17:28,071 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-16 12:17:28,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:17:28,073 INFO L225 Difference]: With dead ends: 44 [2020-10-16 12:17:28,073 INFO L226 Difference]: Without dead ends: 44 [2020-10-16 12:17:28,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-16 12:17:28,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-16 12:17:28,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-10-16 12:17:28,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-16 12:17:28,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2020-10-16 12:17:28,081 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 11 [2020-10-16 12:17:28,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:17:28,081 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2020-10-16 12:17:28,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 12:17:28,081 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2020-10-16 12:17:28,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 12:17:28,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:17:28,083 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:17:28,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:28,298 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:17:28,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:17:28,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1899195462, now seen corresponding path program 2 times [2020-10-16 12:17:28,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:17:28,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667294266] [2020-10-16 12:17:28,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:17:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:17:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 12:17:28,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667294266] [2020-10-16 12:17:28,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642168363] [2020-10-16 12:17:28,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:28,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:17:28,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:17:28,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 12:17:28,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:17:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 12:17:28,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:17:28,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 12:17:28,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365827391] [2020-10-16 12:17:28,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 12:17:28,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:17:28,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 12:17:28,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 12:17:28,486 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand 6 states. [2020-10-16 12:17:28,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:17:28,511 INFO L93 Difference]: Finished difference Result 54 states and 104 transitions. [2020-10-16 12:17:28,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 12:17:28,512 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-16 12:17:28,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:17:28,513 INFO L225 Difference]: With dead ends: 54 [2020-10-16 12:17:28,513 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 12:17:28,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 12:17:28,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 12:17:28,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-10-16 12:17:28,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 12:17:28,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 94 transitions. [2020-10-16 12:17:28,522 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 94 transitions. Word has length 14 [2020-10-16 12:17:28,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:17:28,522 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 94 transitions. [2020-10-16 12:17:28,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 12:17:28,523 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 94 transitions. [2020-10-16 12:17:28,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 12:17:28,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:17:28,524 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:17:28,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:28,738 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:17:28,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:17:28,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1378033683, now seen corresponding path program 3 times [2020-10-16 12:17:28,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:17:28,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719671350] [2020-10-16 12:17:28,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:17:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:17:28,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 12:17:28,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719671350] [2020-10-16 12:17:28,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423432912] [2020-10-16 12:17:28,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:28,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 12:17:28,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:17:28,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 12:17:28,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:17:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 12:17:28,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:17:28,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-10-16 12:17:28,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36461122] [2020-10-16 12:17:28,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 12:17:28,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:17:28,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 12:17:28,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-16 12:17:28,946 INFO L87 Difference]: Start difference. First operand 49 states and 94 transitions. Second operand 9 states. [2020-10-16 12:17:29,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:17:29,234 INFO L93 Difference]: Finished difference Result 76 states and 148 transitions. [2020-10-16 12:17:29,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 12:17:29,241 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-10-16 12:17:29,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:17:29,242 INFO L225 Difference]: With dead ends: 76 [2020-10-16 12:17:29,242 INFO L226 Difference]: Without dead ends: 76 [2020-10-16 12:17:29,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:17:29,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-16 12:17:29,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-10-16 12:17:29,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 12:17:29,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 136 transitions. [2020-10-16 12:17:29,251 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 136 transitions. Word has length 16 [2020-10-16 12:17:29,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:17:29,252 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 136 transitions. [2020-10-16 12:17:29,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 12:17:29,252 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 136 transitions. [2020-10-16 12:17:29,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:17:29,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:17:29,253 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:17:29,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:29,459 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:17:29,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:17:29,460 INFO L82 PathProgramCache]: Analyzing trace with hash -115221563, now seen corresponding path program 4 times [2020-10-16 12:17:29,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:17:29,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867978572] [2020-10-16 12:17:29,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:17:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:17:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 12:17:29,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867978572] [2020-10-16 12:17:29,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336939652] [2020-10-16 12:17:29,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:29,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:17:29,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:17:29,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 12:17:29,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:17:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 12:17:29,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:17:29,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 12:17:29,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702976088] [2020-10-16 12:17:29,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 12:17:29,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:17:29,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 12:17:29,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-16 12:17:29,653 INFO L87 Difference]: Start difference. First operand 70 states and 136 transitions. Second operand 8 states. [2020-10-16 12:17:29,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:17:29,688 INFO L93 Difference]: Finished difference Result 88 states and 172 transitions. [2020-10-16 12:17:29,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 12:17:29,689 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-16 12:17:29,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:17:29,691 INFO L225 Difference]: With dead ends: 88 [2020-10-16 12:17:29,691 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 12:17:29,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-16 12:17:29,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 12:17:29,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2020-10-16 12:17:29,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 12:17:29,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 160 transitions. [2020-10-16 12:17:29,701 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 160 transitions. Word has length 19 [2020-10-16 12:17:29,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:17:29,701 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 160 transitions. [2020-10-16 12:17:29,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 12:17:29,701 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 160 transitions. [2020-10-16 12:17:29,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:17:29,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:17:29,703 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:17:29,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-16 12:17:29,919 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:17:29,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:17:29,919 INFO L82 PathProgramCache]: Analyzing trace with hash -882362510, now seen corresponding path program 5 times [2020-10-16 12:17:29,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:17:29,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042793171] [2020-10-16 12:17:29,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:17:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:17:30,007 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 12:17:30,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042793171] [2020-10-16 12:17:30,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297472928] [2020-10-16 12:17:30,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:30,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 12:17:30,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:17:30,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 12:17:30,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:17:30,109 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-16 12:17:30,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:17:30,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-10-16 12:17:30,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546003568] [2020-10-16 12:17:30,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 12:17:30,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:17:30,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 12:17:30,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:17:30,111 INFO L87 Difference]: Start difference. First operand 82 states and 160 transitions. Second operand 12 states. [2020-10-16 12:17:30,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:17:30,637 INFO L93 Difference]: Finished difference Result 116 states and 228 transitions. [2020-10-16 12:17:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 12:17:30,639 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-16 12:17:30,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:17:30,640 INFO L225 Difference]: With dead ends: 116 [2020-10-16 12:17:30,641 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 12:17:30,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 12:17:30,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 12:17:30,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2020-10-16 12:17:30,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-16 12:17:30,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 214 transitions. [2020-10-16 12:17:30,650 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 214 transitions. Word has length 21 [2020-10-16 12:17:30,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:17:30,651 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 214 transitions. [2020-10-16 12:17:30,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 12:17:30,651 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 214 transitions. [2020-10-16 12:17:30,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 12:17:30,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:17:30,652 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:17:30,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:30,866 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:17:30,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:17:30,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1928037594, now seen corresponding path program 6 times [2020-10-16 12:17:30,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:17:30,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630343300] [2020-10-16 12:17:30,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:17:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:17:30,960 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-16 12:17:30,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630343300] [2020-10-16 12:17:30,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727525006] [2020-10-16 12:17:30,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:31,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 12:17:31,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:17:31,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 12:17:31,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:17:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-16 12:17:31,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:17:31,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-10-16 12:17:31,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790660830] [2020-10-16 12:17:31,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 12:17:31,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:17:31,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 12:17:31,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:17:31,128 INFO L87 Difference]: Start difference. First operand 109 states and 214 transitions. Second operand 14 states. [2020-10-16 12:17:31,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:17:31,996 INFO L93 Difference]: Finished difference Result 148 states and 292 transitions. [2020-10-16 12:17:31,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-16 12:17:31,997 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-10-16 12:17:31,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:17:31,998 INFO L225 Difference]: With dead ends: 148 [2020-10-16 12:17:31,998 INFO L226 Difference]: Without dead ends: 148 [2020-10-16 12:17:32,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 12:17:32,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-16 12:17:32,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 140. [2020-10-16 12:17:32,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 12:17:32,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 276 transitions. [2020-10-16 12:17:32,010 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 276 transitions. Word has length 24 [2020-10-16 12:17:32,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:17:32,011 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 276 transitions. [2020-10-16 12:17:32,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 12:17:32,011 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 276 transitions. [2020-10-16 12:17:32,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 12:17:32,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:17:32,013 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:17:32,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:32,227 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:17:32,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:17:32,228 INFO L82 PathProgramCache]: Analyzing trace with hash 867592876, now seen corresponding path program 7 times [2020-10-16 12:17:32,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:17:32,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858458192] [2020-10-16 12:17:32,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:17:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:17:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-16 12:17:32,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858458192] [2020-10-16 12:17:32,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877302169] [2020-10-16 12:17:32,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:17:32,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:17:32,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:17:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-16 12:17:32,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:17:32,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 12:17:32,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429200900] [2020-10-16 12:17:32,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 12:17:32,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:17:32,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 12:17:32,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-16 12:17:32,434 INFO L87 Difference]: Start difference. First operand 140 states and 276 transitions. Second operand 11 states. [2020-10-16 12:17:32,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:17:32,480 INFO L93 Difference]: Finished difference Result 164 states and 324 transitions. [2020-10-16 12:17:32,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 12:17:32,480 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-16 12:17:32,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:17:32,482 INFO L225 Difference]: With dead ends: 164 [2020-10-16 12:17:32,482 INFO L226 Difference]: Without dead ends: 164 [2020-10-16 12:17:32,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-16 12:17:32,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-16 12:17:32,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 156. [2020-10-16 12:17:32,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-16 12:17:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 308 transitions. [2020-10-16 12:17:32,492 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 308 transitions. Word has length 27 [2020-10-16 12:17:32,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:17:32,492 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 308 transitions. [2020-10-16 12:17:32,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 12:17:32,492 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 308 transitions. [2020-10-16 12:17:32,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 12:17:32,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:17:32,494 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:17:32,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-16 12:17:32,707 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:17:32,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:17:32,708 INFO L82 PathProgramCache]: Analyzing trace with hash -441398951, now seen corresponding path program 8 times [2020-10-16 12:17:32,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:17:32,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119649810] [2020-10-16 12:17:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:17:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:17:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-16 12:17:32,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119649810] [2020-10-16 12:17:32,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931957894] [2020-10-16 12:17:32,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:32,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:17:32,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:17:32,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 12:17:32,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:17:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-16 12:17:32,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:17:32,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 12:17:32,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298283341] [2020-10-16 12:17:32,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 12:17:32,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:17:32,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 12:17:32,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:17:32,927 INFO L87 Difference]: Start difference. First operand 156 states and 308 transitions. Second operand 12 states. [2020-10-16 12:17:32,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:17:32,973 INFO L93 Difference]: Finished difference Result 180 states and 356 transitions. [2020-10-16 12:17:32,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 12:17:32,974 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-16 12:17:32,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:17:32,976 INFO L225 Difference]: With dead ends: 180 [2020-10-16 12:17:32,977 INFO L226 Difference]: Without dead ends: 180 [2020-10-16 12:17:32,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:17:32,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-16 12:17:32,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2020-10-16 12:17:32,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-16 12:17:32,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 340 transitions. [2020-10-16 12:17:32,984 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 340 transitions. Word has length 29 [2020-10-16 12:17:32,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:17:32,985 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 340 transitions. [2020-10-16 12:17:32,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 12:17:32,985 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 340 transitions. [2020-10-16 12:17:32,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-16 12:17:32,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:17:32,987 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:17:33,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:33,202 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:17:33,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:17:33,203 INFO L82 PathProgramCache]: Analyzing trace with hash 42873030, now seen corresponding path program 9 times [2020-10-16 12:17:33,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:17:33,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806345326] [2020-10-16 12:17:33,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:17:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:17:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-16 12:17:33,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806345326] [2020-10-16 12:17:33,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958389382] [2020-10-16 12:17:33,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:33,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 12:17:33,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:17:33,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 12:17:33,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:17:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-16 12:17:33,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:17:33,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2020-10-16 12:17:33,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712999590] [2020-10-16 12:17:33,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 12:17:33,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:17:33,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 12:17:33,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:17:33,622 INFO L87 Difference]: Start difference. First operand 172 states and 340 transitions. Second operand 18 states. [2020-10-16 12:17:35,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:17:35,267 INFO L93 Difference]: Finished difference Result 220 states and 436 transitions. [2020-10-16 12:17:35,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-16 12:17:35,268 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2020-10-16 12:17:35,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:17:35,269 INFO L225 Difference]: With dead ends: 220 [2020-10-16 12:17:35,269 INFO L226 Difference]: Without dead ends: 220 [2020-10-16 12:17:35,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1824 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1848, Invalid=4158, Unknown=0, NotChecked=0, Total=6006 [2020-10-16 12:17:35,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-16 12:17:35,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 211. [2020-10-16 12:17:35,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-16 12:17:35,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 418 transitions. [2020-10-16 12:17:35,279 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 418 transitions. Word has length 31 [2020-10-16 12:17:35,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:17:35,280 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 418 transitions. [2020-10-16 12:17:35,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 12:17:35,280 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 418 transitions. [2020-10-16 12:17:35,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-16 12:17:35,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:17:35,282 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:17:35,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:35,497 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:17:35,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:17:35,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1510869138, now seen corresponding path program 10 times [2020-10-16 12:17:35,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:17:35,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734164552] [2020-10-16 12:17:35,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:17:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:17:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-16 12:17:35,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734164552] [2020-10-16 12:17:35,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942740739] [2020-10-16 12:17:35,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:35,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:17:35,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:17:35,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:17:35,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:17:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-16 12:17:35,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:17:35,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 12:17:35,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517275315] [2020-10-16 12:17:35,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 12:17:35,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:17:35,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 12:17:35,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:17:35,720 INFO L87 Difference]: Start difference. First operand 211 states and 418 transitions. Second operand 14 states. [2020-10-16 12:17:35,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:17:35,775 INFO L93 Difference]: Finished difference Result 238 states and 472 transitions. [2020-10-16 12:17:35,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 12:17:35,781 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-16 12:17:35,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:17:35,783 INFO L225 Difference]: With dead ends: 238 [2020-10-16 12:17:35,784 INFO L226 Difference]: Without dead ends: 238 [2020-10-16 12:17:35,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:17:35,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-16 12:17:35,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 229. [2020-10-16 12:17:35,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-16 12:17:35,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 454 transitions. [2020-10-16 12:17:35,792 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 454 transitions. Word has length 34 [2020-10-16 12:17:35,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:17:35,793 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 454 transitions. [2020-10-16 12:17:35,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 12:17:35,793 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 454 transitions. [2020-10-16 12:17:35,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-16 12:17:35,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:17:35,794 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:17:36,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-16 12:17:36,002 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:17:36,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:17:36,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1014578501, now seen corresponding path program 11 times [2020-10-16 12:17:36,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:17:36,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820219878] [2020-10-16 12:17:36,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:17:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:17:36,149 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-16 12:17:36,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820219878] [2020-10-16 12:17:36,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432307560] [2020-10-16 12:17:36,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:36,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-16 12:17:36,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:17:36,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 12:17:36,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:17:36,329 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-16 12:17:36,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:17:36,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2020-10-16 12:17:36,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66524113] [2020-10-16 12:17:36,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 12:17:36,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:17:36,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 12:17:36,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:17:36,332 INFO L87 Difference]: Start difference. First operand 229 states and 454 transitions. Second operand 21 states. [2020-10-16 12:17:39,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:17:39,081 INFO L93 Difference]: Finished difference Result 284 states and 564 transitions. [2020-10-16 12:17:39,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-10-16 12:17:39,082 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 36 [2020-10-16 12:17:39,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:17:39,083 INFO L225 Difference]: With dead ends: 284 [2020-10-16 12:17:39,083 INFO L226 Difference]: Without dead ends: 284 [2020-10-16 12:17:39,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3563 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3276, Invalid=7644, Unknown=0, NotChecked=0, Total=10920 [2020-10-16 12:17:39,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-16 12:17:39,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 274. [2020-10-16 12:17:39,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-16 12:17:39,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 544 transitions. [2020-10-16 12:17:39,094 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 544 transitions. Word has length 36 [2020-10-16 12:17:39,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:17:39,094 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 544 transitions. [2020-10-16 12:17:39,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 12:17:39,095 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 544 transitions. [2020-10-16 12:17:39,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-16 12:17:39,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:17:39,096 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:17:39,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 12:17:39,310 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:17:39,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:17:39,310 INFO L82 PathProgramCache]: Analyzing trace with hash -299405075, now seen corresponding path program 12 times [2020-10-16 12:17:39,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:17:39,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706218775] [2020-10-16 12:17:39,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:17:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:17:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-16 12:17:39,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706218775] [2020-10-16 12:17:39,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442144466] [2020-10-16 12:17:39,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:39,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-16 12:17:39,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:17:39,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:17:39,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:17:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-16 12:17:39,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:17:39,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2020-10-16 12:17:39,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024379166] [2020-10-16 12:17:39,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:17:39,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:17:39,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:17:39,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:17:39,701 INFO L87 Difference]: Start difference. First operand 274 states and 544 transitions. Second operand 23 states. [2020-10-16 12:17:43,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:17:43,512 INFO L93 Difference]: Finished difference Result 334 states and 664 transitions. [2020-10-16 12:17:43,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-10-16 12:17:43,515 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 39 [2020-10-16 12:17:43,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:17:43,517 INFO L225 Difference]: With dead ends: 334 [2020-10-16 12:17:43,517 INFO L226 Difference]: Without dead ends: 334 [2020-10-16 12:17:43,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5452 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4725, Invalid=11277, Unknown=0, NotChecked=0, Total=16002 [2020-10-16 12:17:43,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-16 12:17:43,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 323. [2020-10-16 12:17:43,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-10-16 12:17:43,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 642 transitions. [2020-10-16 12:17:43,530 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 642 transitions. Word has length 39 [2020-10-16 12:17:43,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:17:43,531 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 642 transitions. [2020-10-16 12:17:43,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:17:43,531 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 642 transitions. [2020-10-16 12:17:43,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-16 12:17:43,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:17:43,533 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:17:43,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-16 12:17:43,761 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:17:43,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:17:43,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1077564853, now seen corresponding path program 13 times [2020-10-16 12:17:43,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:17:43,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953709143] [2020-10-16 12:17:43,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:17:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:17:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-16 12:17:43,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953709143] [2020-10-16 12:17:43,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506394363] [2020-10-16 12:17:43,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:17:44,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 12:17:44,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:17:44,078 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-16 12:17:44,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:17:44,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 12:17:44,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356007808] [2020-10-16 12:17:44,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 12:17:44,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:17:44,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 12:17:44,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:17:44,080 INFO L87 Difference]: Start difference. First operand 323 states and 642 transitions. Second operand 17 states. [2020-10-16 12:17:44,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:17:44,152 INFO L93 Difference]: Finished difference Result 356 states and 708 transitions. [2020-10-16 12:17:44,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 12:17:44,152 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-16 12:17:44,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:17:44,155 INFO L225 Difference]: With dead ends: 356 [2020-10-16 12:17:44,155 INFO L226 Difference]: Without dead ends: 356 [2020-10-16 12:17:44,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:17:44,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-10-16 12:17:44,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 345. [2020-10-16 12:17:44,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-16 12:17:44,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 686 transitions. [2020-10-16 12:17:44,164 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 686 transitions. Word has length 42 [2020-10-16 12:17:44,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:17:44,164 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 686 transitions. [2020-10-16 12:17:44,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 12:17:44,164 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 686 transitions. [2020-10-16 12:17:44,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-16 12:17:44,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:17:44,166 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:17:44,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:44,380 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:17:44,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:17:44,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1718191106, now seen corresponding path program 14 times [2020-10-16 12:17:44,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:17:44,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175328666] [2020-10-16 12:17:44,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:17:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:17:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-16 12:17:44,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175328666] [2020-10-16 12:17:44,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62993415] [2020-10-16 12:17:44,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:44,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:17:44,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:17:44,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 12:17:44,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:17:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-16 12:17:44,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:17:44,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 12:17:44,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570054577] [2020-10-16 12:17:44,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 12:17:44,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:17:44,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 12:17:44,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:17:44,709 INFO L87 Difference]: Start difference. First operand 345 states and 686 transitions. Second operand 18 states. [2020-10-16 12:17:44,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:17:44,772 INFO L93 Difference]: Finished difference Result 378 states and 752 transitions. [2020-10-16 12:17:44,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 12:17:44,773 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-16 12:17:44,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:17:44,776 INFO L225 Difference]: With dead ends: 378 [2020-10-16 12:17:44,776 INFO L226 Difference]: Without dead ends: 378 [2020-10-16 12:17:44,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:17:44,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-10-16 12:17:44,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 367. [2020-10-16 12:17:44,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-10-16 12:17:44,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 730 transitions. [2020-10-16 12:17:44,786 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 730 transitions. Word has length 44 [2020-10-16 12:17:44,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:17:44,787 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 730 transitions. [2020-10-16 12:17:44,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 12:17:44,787 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 730 transitions. [2020-10-16 12:17:44,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-16 12:17:44,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:17:44,788 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:17:45,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 12:17:45,003 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:17:45,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:17:45,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1115270385, now seen corresponding path program 15 times [2020-10-16 12:17:45,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:17:45,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064295329] [2020-10-16 12:17:45,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:17:45,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:17:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-16 12:17:45,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064295329] [2020-10-16 12:17:45,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819050737] [2020-10-16 12:17:45,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:45,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 12:17:45,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:17:45,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 12:17:45,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:17:45,571 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-16 12:17:45,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:17:45,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 27 [2020-10-16 12:17:45,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695958909] [2020-10-16 12:17:45,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 12:17:45,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:17:45,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 12:17:45,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-16 12:17:45,574 INFO L87 Difference]: Start difference. First operand 367 states and 730 transitions. Second operand 27 states. [2020-10-16 12:17:51,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:17:51,981 INFO L93 Difference]: Finished difference Result 436 states and 868 transitions. [2020-10-16 12:17:51,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2020-10-16 12:17:51,981 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 46 [2020-10-16 12:17:51,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:17:51,984 INFO L225 Difference]: With dead ends: 436 [2020-10-16 12:17:51,984 INFO L226 Difference]: Without dead ends: 436 [2020-10-16 12:17:51,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10431 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=8415, Invalid=20655, Unknown=0, NotChecked=0, Total=29070 [2020-10-16 12:17:51,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-10-16 12:17:51,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 424. [2020-10-16 12:17:52,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2020-10-16 12:17:52,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 844 transitions. [2020-10-16 12:17:52,002 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 844 transitions. Word has length 46 [2020-10-16 12:17:52,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:17:52,002 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 844 transitions. [2020-10-16 12:17:52,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 12:17:52,002 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 844 transitions. [2020-10-16 12:17:52,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-16 12:17:52,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:17:52,004 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:17:52,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 12:17:52,219 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:17:52,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:17:52,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1391947135, now seen corresponding path program 16 times [2020-10-16 12:17:52,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:17:52,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836716117] [2020-10-16 12:17:52,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:17:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:17:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-16 12:17:52,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836716117] [2020-10-16 12:17:52,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069796459] [2020-10-16 12:17:52,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:52,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:17:52,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:17:52,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 12:17:52,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:17:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-16 12:17:52,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:17:52,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 12:17:52,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045793597] [2020-10-16 12:17:52,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 12:17:52,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:17:52,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 12:17:52,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:17:52,640 INFO L87 Difference]: Start difference. First operand 424 states and 844 transitions. Second operand 20 states. [2020-10-16 12:17:52,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:17:52,714 INFO L93 Difference]: Finished difference Result 460 states and 916 transitions. [2020-10-16 12:17:52,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 12:17:52,715 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-10-16 12:17:52,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:17:52,717 INFO L225 Difference]: With dead ends: 460 [2020-10-16 12:17:52,717 INFO L226 Difference]: Without dead ends: 460 [2020-10-16 12:17:52,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:17:52,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-16 12:17:52,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 448. [2020-10-16 12:17:52,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-10-16 12:17:52,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 892 transitions. [2020-10-16 12:17:52,728 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 892 transitions. Word has length 49 [2020-10-16 12:17:52,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:17:52,728 INFO L481 AbstractCegarLoop]: Abstraction has 448 states and 892 transitions. [2020-10-16 12:17:52,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 12:17:52,728 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 892 transitions. [2020-10-16 12:17:52,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-16 12:17:52,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:17:52,730 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:17:52,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 12:17:52,944 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:17:52,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:17:52,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1588788882, now seen corresponding path program 17 times [2020-10-16 12:17:52,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:17:52,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791902512] [2020-10-16 12:17:52,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:17:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:17:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-16 12:17:53,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791902512] [2020-10-16 12:17:53,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476846593] [2020-10-16 12:17:53,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:17:53,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-10-16 12:17:53,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:17:53,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 12:17:53,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:17:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-10-16 12:17:53,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:17:53,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 30 [2020-10-16 12:17:53,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128182294] [2020-10-16 12:17:53,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-16 12:17:53,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:17:53,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-16 12:17:53,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=615, Unknown=0, NotChecked=0, Total=870 [2020-10-16 12:17:53,497 INFO L87 Difference]: Start difference. First operand 448 states and 892 transitions. Second operand 30 states. [2020-10-16 12:18:02,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:18:02,799 INFO L93 Difference]: Finished difference Result 524 states and 1044 transitions. [2020-10-16 12:18:02,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2020-10-16 12:18:02,799 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 51 [2020-10-16 12:18:02,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:18:02,802 INFO L225 Difference]: With dead ends: 524 [2020-10-16 12:18:02,802 INFO L226 Difference]: Without dead ends: 524 [2020-10-16 12:18:02,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16280 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=12540, Invalid=31350, Unknown=0, NotChecked=0, Total=43890 [2020-10-16 12:18:02,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-10-16 12:18:02,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 511. [2020-10-16 12:18:02,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-10-16 12:18:02,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1018 transitions. [2020-10-16 12:18:02,816 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1018 transitions. Word has length 51 [2020-10-16 12:18:02,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:18:02,816 INFO L481 AbstractCegarLoop]: Abstraction has 511 states and 1018 transitions. [2020-10-16 12:18:02,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-16 12:18:02,817 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1018 transitions. [2020-10-16 12:18:02,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-16 12:18:02,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:18:02,819 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:18:03,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:18:03,034 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:18:03,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:18:03,034 INFO L82 PathProgramCache]: Analyzing trace with hash 835392874, now seen corresponding path program 18 times [2020-10-16 12:18:03,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:18:03,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317407933] [2020-10-16 12:18:03,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:18:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:18:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-16 12:18:03,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317407933] [2020-10-16 12:18:03,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740423279] [2020-10-16 12:18:03,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:18:03,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-16 12:18:03,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:18:03,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:18:03,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:18:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 18 proven. 55 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-10-16 12:18:03,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:18:03,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 32 [2020-10-16 12:18:03,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284478740] [2020-10-16 12:18:03,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-16 12:18:03,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:18:03,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-16 12:18:03,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=705, Unknown=0, NotChecked=0, Total=992 [2020-10-16 12:18:03,672 INFO L87 Difference]: Start difference. First operand 511 states and 1018 transitions. Second operand 32 states. [2020-10-16 12:18:15,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:18:15,857 INFO L93 Difference]: Finished difference Result 592 states and 1180 transitions. [2020-10-16 12:18:15,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 241 states. [2020-10-16 12:18:15,857 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 54 [2020-10-16 12:18:15,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:18:15,860 INFO L225 Difference]: With dead ends: 592 [2020-10-16 12:18:15,861 INFO L226 Difference]: Without dead ends: 592 [2020-10-16 12:18:15,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21934 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=16380, Invalid=41460, Unknown=0, NotChecked=0, Total=57840 [2020-10-16 12:18:15,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2020-10-16 12:18:15,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 578. [2020-10-16 12:18:15,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 578 states. [2020-10-16 12:18:15,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1152 transitions. [2020-10-16 12:18:15,876 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1152 transitions. Word has length 54 [2020-10-16 12:18:15,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:18:15,876 INFO L481 AbstractCegarLoop]: Abstraction has 578 states and 1152 transitions. [2020-10-16 12:18:15,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-16 12:18:15,877 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1152 transitions. [2020-10-16 12:18:15,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-16 12:18:15,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:18:15,878 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:18:16,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:18:16,094 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:18:16,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:18:16,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1589265368, now seen corresponding path program 19 times [2020-10-16 12:18:16,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:18:16,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935543997] [2020-10-16 12:18:16,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:18:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:18:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-16 12:18:16,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935543997] [2020-10-16 12:18:16,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287610562] [2020-10-16 12:18:16,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:18:16,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:18:16,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 12:18:16,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:18:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-16 12:18:16,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:18:16,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 12:18:16,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930148588] [2020-10-16 12:18:16,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:18:16,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:18:16,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:18:16,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:18:16,543 INFO L87 Difference]: Start difference. First operand 578 states and 1152 transitions. Second operand 23 states. [2020-10-16 12:18:16,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:18:16,634 INFO L93 Difference]: Finished difference Result 606 states and 1208 transitions. [2020-10-16 12:18:16,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 12:18:16,635 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-10-16 12:18:16,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:18:16,639 INFO L225 Difference]: With dead ends: 606 [2020-10-16 12:18:16,639 INFO L226 Difference]: Without dead ends: 606 [2020-10-16 12:18:16,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:18:16,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-10-16 12:18:16,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 606. [2020-10-16 12:18:16,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 606 states. [2020-10-16 12:18:16,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1208 transitions. [2020-10-16 12:18:16,654 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1208 transitions. Word has length 57 [2020-10-16 12:18:16,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:18:16,654 INFO L481 AbstractCegarLoop]: Abstraction has 606 states and 1208 transitions. [2020-10-16 12:18:16,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:18:16,655 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1208 transitions. [2020-10-16 12:18:16,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-16 12:18:16,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:18:16,658 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:18:16,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-16 12:18:16,873 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:18:16,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:18:16,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1130959339, now seen corresponding path program 20 times [2020-10-16 12:18:16,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:18:16,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321629242] [2020-10-16 12:18:16,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:18:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:18:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-10-16 12:18:17,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321629242] [2020-10-16 12:18:17,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130854939] [2020-10-16 12:18:17,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:18:17,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:18:17,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:18:17,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 53 conjunts are in the unsatisfiable core [2020-10-16 12:18:17,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:18:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 0 proven. 466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:18:18,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:18:18,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 52] total 66 [2020-10-16 12:18:18,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028464719] [2020-10-16 12:18:18,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-16 12:18:18,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:18:18,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-16 12:18:18,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=881, Invalid=3409, Unknown=0, NotChecked=0, Total=4290 [2020-10-16 12:18:18,920 INFO L87 Difference]: Start difference. First operand 606 states and 1208 transitions. Second operand 66 states. [2020-10-16 12:19:38,453 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 7 Received shutdown request... [2020-10-16 12:21:26,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1889 states. [2020-10-16 12:21:27,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-16 12:21:27,105 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-16 12:21:27,109 WARN L235 ceAbstractionStarter]: Timeout [2020-10-16 12:21:27,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 12:21:27 BasicIcfg [2020-10-16 12:21:27,109 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 12:21:27,111 INFO L168 Benchmark]: Toolchain (without parser) took 247463.17 ms. Allocated memory was 140.5 MB in the beginning and 1.7 GB in the end (delta: 1.6 GB). Free memory was 101.3 MB in the beginning and 684.0 MB in the end (delta: -582.7 MB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. [2020-10-16 12:21:27,111 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-16 12:21:27,112 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1176.98 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 101.1 MB in the beginning and 109.4 MB in the end (delta: -8.3 MB). Peak memory consumption was 60.3 MB. Max. memory is 7.1 GB. [2020-10-16 12:21:27,113 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.10 ms. Allocated memory is still 203.9 MB. Free memory was 109.4 MB in the beginning and 106.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-10-16 12:21:27,115 INFO L168 Benchmark]: Boogie Preprocessor took 49.41 ms. Allocated memory is still 203.9 MB. Free memory was 106.7 MB in the beginning and 104.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-16 12:21:27,116 INFO L168 Benchmark]: RCFGBuilder took 503.22 ms. Allocated memory was 203.9 MB in the beginning and 238.6 MB in the end (delta: 34.6 MB). Free memory was 104.7 MB in the beginning and 197.2 MB in the end (delta: -92.5 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. [2020-10-16 12:21:27,116 INFO L168 Benchmark]: TraceAbstraction took 245663.92 ms. Allocated memory was 238.6 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 195.7 MB in the beginning and 684.0 MB in the end (delta: -488.3 MB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. [2020-10-16 12:21:27,119 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1176.98 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 101.1 MB in the beginning and 109.4 MB in the end (delta: -8.3 MB). Peak memory consumption was 60.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 63.10 ms. Allocated memory is still 203.9 MB. Free memory was 109.4 MB in the beginning and 106.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 49.41 ms. Allocated memory is still 203.9 MB. Free memory was 106.7 MB in the beginning and 104.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 503.22 ms. Allocated memory was 203.9 MB in the beginning and 238.6 MB in the end (delta: 34.6 MB). Free memory was 104.7 MB in the beginning and 197.2 MB in the end (delta: -92.5 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 245663.92 ms. Allocated memory was 238.6 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 195.7 MB in the beginning and 684.0 MB in the end (delta: -488.3 MB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 340 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 10 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 5.3s, 82 PlacesBefore, 15 PlacesAfterwards, 85 TransitionsBefore, 13 TransitionsAfterwards, 640 CoEnabledTransitionPairs, 6 FixpointIterations, 44 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 6 ConcurrentYvCompositions, 5 ChoiceCompositions, 83 TotalNumberOfCompositions, 580 MoverChecksTotal - TimeoutResultAtElement [Line: 2]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 2). Cancelled while BasicCegarLoop was constructing difference of abstraction (606states) and FLOYD_HOARE automaton (currently 1889 states, 66 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 1931 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 79 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 245.5s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 226.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.3s, HoareTripleCheckerStatistics: 273 SDtfs, 3009 SDslu, 2353 SDs, 0 SdLazy, 3559 SolverSat, 3928 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4809 GetRequests, 1736 SyntacticMatches, 0 SemanticMatches, 3072 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2510538 ImplicationChecksByTransitivity, 199.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=606occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 169 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 1432 NumberOfCodeBlocks, 1366 NumberOfCodeBlocksAsserted, 119 NumberOfCheckSat, 1389 ConstructedInterpolants, 0 QuantifiedInterpolants, 133341 SizeOfPredicates, 60 NumberOfNonLiveVariables, 3839 ConjunctsInSsa, 241 ConjunctsInUnsatCore, 43 InterpolantComputations, 2 PerfectInterpolantSequences, 2362/6800 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown