/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf -i ../../../trunk/examples/svcomp/pthread-lit/qw2004-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 18:22:22,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 18:22:22,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 18:22:22,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 18:22:22,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 18:22:22,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 18:22:22,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 18:22:22,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 18:22:22,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 18:22:22,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 18:22:22,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 18:22:22,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 18:22:22,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 18:22:22,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 18:22:22,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 18:22:22,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 18:22:22,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 18:22:22,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 18:22:22,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 18:22:22,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 18:22:22,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 18:22:22,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 18:22:22,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 18:22:22,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 18:22:22,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-09 18:22:22,161 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 18:22:22,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 18:22:22,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 18:22:22,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 18:22:22,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 18:22:22,167 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 18:22:22,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 18:22:22,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 18:22:22,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 18:22:22,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 18:22:22,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 18:22:22,172 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-09 18:22:22,206 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 18:22:22,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 18:22:22,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 18:22:22,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 18:22:22,209 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 18:22:22,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 18:22:22,209 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 18:22:22,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 18:22:22,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 18:22:22,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 18:22:22,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 18:22:22,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 18:22:22,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 18:22:22,212 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 18:22:22,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 18:22:22,213 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 18:22:22,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 18:22:22,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 18:22:22,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 18:22:22,214 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 18:22:22,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 18:22:22,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 18:22:22,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 18:22:22,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 18:22:22,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 18:22:22,215 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 18:22:22,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 18:22:22,215 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 18:22:22,215 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 18:22:22,216 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 18:22:22,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 18:22:22,486 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 18:22:22,489 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 18:22:22,491 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 18:22:22,491 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 18:22:22,492 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-lit/qw2004-2.i [2020-10-09 18:22:22,548 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2c81acfd/c85d10a36d6c44e6a3004c3d7d80b25e/FLAG81b844248 [2020-10-09 18:22:23,077 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 18:22:23,078 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-lit/qw2004-2.i [2020-10-09 18:22:23,089 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2c81acfd/c85d10a36d6c44e6a3004c3d7d80b25e/FLAG81b844248 [2020-10-09 18:22:23,373 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2c81acfd/c85d10a36d6c44e6a3004c3d7d80b25e [2020-10-09 18:22:23,380 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 18:22:23,382 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 18:22:23,383 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 18:22:23,383 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 18:22:23,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 18:22:23,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 06:22:23" (1/1) ... [2020-10-09 18:22:23,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53d8808d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:23, skipping insertion in model container [2020-10-09 18:22:23,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 06:22:23" (1/1) ... [2020-10-09 18:22:23,398 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 18:22:23,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 18:22:23,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 18:22:23,878 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 18:22:23,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 18:22:24,018 INFO L208 MainTranslator]: Completed translation [2020-10-09 18:22:24,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:24 WrapperNode [2020-10-09 18:22:24,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 18:22:24,022 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 18:22:24,022 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 18:22:24,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 18:22:24,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:24" (1/1) ... [2020-10-09 18:22:24,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:24" (1/1) ... [2020-10-09 18:22:24,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 18:22:24,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 18:22:24,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 18:22:24,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 18:22:24,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:24" (1/1) ... [2020-10-09 18:22:24,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:24" (1/1) ... [2020-10-09 18:22:24,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:24" (1/1) ... [2020-10-09 18:22:24,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:24" (1/1) ... [2020-10-09 18:22:24,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:24" (1/1) ... [2020-10-09 18:22:24,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:24" (1/1) ... [2020-10-09 18:22:24,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:24" (1/1) ... [2020-10-09 18:22:24,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 18:22:24,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 18:22:24,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 18:22:24,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 18:22:24,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 18:22:24,182 INFO L130 BoogieDeclarations]: Found specification of procedure BCSP_PnpStop [2020-10-09 18:22:24,182 INFO L138 BoogieDeclarations]: Found implementation of procedure BCSP_PnpStop [2020-10-09 18:22:24,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 18:22:24,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 18:22:24,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 18:22:24,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 18:22:24,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 18:22:24,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 18:22:24,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 18:22:24,187 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 18:22:24,561 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 18:22:24,561 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-09 18:22:24,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 06:22:24 BoogieIcfgContainer [2020-10-09 18:22:24,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 18:22:24,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 18:22:24,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 18:22:24,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 18:22:24,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 06:22:23" (1/3) ... [2020-10-09 18:22:24,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382c67d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 06:22:24, skipping insertion in model container [2020-10-09 18:22:24,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:24" (2/3) ... [2020-10-09 18:22:24,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382c67d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 06:22:24, skipping insertion in model container [2020-10-09 18:22:24,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 06:22:24" (3/3) ... [2020-10-09 18:22:24,571 INFO L111 eAbstractionObserver]: Analyzing ICFG qw2004-2.i [2020-10-09 18:22:24,583 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 18:22:24,590 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 18:22:24,591 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 18:22:24,617 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,618 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,618 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,618 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,619 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,619 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,619 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,620 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,620 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,620 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_dec_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,620 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,621 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_dec_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,621 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_dec_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,621 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,621 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,622 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,622 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,622 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,622 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,622 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,623 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,623 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,623 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,624 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,624 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,624 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,624 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,625 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,625 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,625 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,629 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,629 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,629 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_dec_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,629 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,630 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,630 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,630 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,630 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,630 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,631 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,631 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:24,648 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-09 18:22:24,665 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 18:22:24,665 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 18:22:24,665 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 18:22:24,666 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 18:22:24,666 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 18:22:24,666 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 18:22:24,666 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 18:22:24,666 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 18:22:24,678 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 85 places, 87 transitions, 179 flow [2020-10-09 18:22:24,727 INFO L129 PetriNetUnfolder]: 6/86 cut-off events. [2020-10-09 18:22:24,727 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 18:22:24,734 INFO L80 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 86 events. 6/86 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 84 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 70. Up to 3 conditions per place. [2020-10-09 18:22:24,734 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 87 transitions, 179 flow [2020-10-09 18:22:24,742 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 86 transitions, 175 flow [2020-10-09 18:22:24,766 INFO L129 PetriNetUnfolder]: 5/67 cut-off events. [2020-10-09 18:22:24,766 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 18:22:24,766 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:22:24,767 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 18:22:24,768 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:22:24,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:22:24,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1968156304, now seen corresponding path program 1 times [2020-10-09 18:22:24,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:22:24,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704251565] [2020-10-09 18:22:24,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-09 18:22:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:22:24,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-09 18:22:24,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:22:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:22:24,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:22:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:22:24,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704251565] [2020-10-09 18:22:24,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:22:24,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-10-09 18:22:24,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213570587] [2020-10-09 18:22:24,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 18:22:24,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:22:24,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 18:22:24,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 18:22:25,000 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 87 [2020-10-09 18:22:25,002 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 175 flow. Second operand 3 states. [2020-10-09 18:22:25,002 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:22:25,002 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 87 [2020-10-09 18:22:25,004 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:22:25,088 INFO L129 PetriNetUnfolder]: 8/175 cut-off events. [2020-10-09 18:22:25,088 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 18:22:25,093 INFO L80 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 175 events. 8/175 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 548 event pairs, 0 based on Foata normal form. 7/168 useless extension candidates. Maximal degree in co-relation 164. Up to 6 conditions per place. [2020-10-09 18:22:25,097 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 3 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2020-10-09 18:22:25,098 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 85 transitions, 185 flow [2020-10-09 18:22:25,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 18:22:25,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-09 18:22:25,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2020-10-09 18:22:25,119 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9616858237547893 [2020-10-09 18:22:25,120 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 251 transitions. [2020-10-09 18:22:25,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 251 transitions. [2020-10-09 18:22:25,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:22:25,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 251 transitions. [2020-10-09 18:22:25,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-09 18:22:25,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-09 18:22:25,143 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-09 18:22:25,145 INFO L185 Difference]: Start difference. First operand has 84 places, 86 transitions, 175 flow. Second operand 3 states and 251 transitions. [2020-10-09 18:22:25,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 85 transitions, 185 flow [2020-10-09 18:22:25,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 85 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-09 18:22:25,155 INFO L241 Difference]: Finished difference. Result has 87 places, 85 transitions, 188 flow [2020-10-09 18:22:25,158 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=87, PETRI_TRANSITIONS=85} [2020-10-09 18:22:25,159 INFO L341 CegarLoopForPetriNet]: 84 programPoint places, 3 predicate places. [2020-10-09 18:22:25,160 INFO L481 AbstractCegarLoop]: Abstraction has has 87 places, 85 transitions, 188 flow [2020-10-09 18:22:25,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-09 18:22:25,160 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:22:25,160 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 18:22:25,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 18:22:25,381 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:22:25,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:22:25,382 INFO L82 PathProgramCache]: Analyzing trace with hash 875700068, now seen corresponding path program 1 times [2020-10-09 18:22:25,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:22:25,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028263828] [2020-10-09 18:22:25,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-09 18:22:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:22:25,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-09 18:22:25,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:22:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:22:25,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:22:25,537 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 18:22:25,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:22:25,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028263828] [2020-10-09 18:22:25,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:22:25,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-10-09 18:22:25,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723706585] [2020-10-09 18:22:25,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-09 18:22:25,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:22:25,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-09 18:22:25,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-09 18:22:25,595 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 87 [2020-10-09 18:22:25,595 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 85 transitions, 188 flow. Second operand 5 states. [2020-10-09 18:22:25,596 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:22:25,596 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 87 [2020-10-09 18:22:25,596 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:22:25,694 INFO L129 PetriNetUnfolder]: 18/312 cut-off events. [2020-10-09 18:22:25,694 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-09 18:22:25,697 INFO L80 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 312 events. 18/312 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1415 event pairs, 0 based on Foata normal form. 5/300 useless extension candidates. Maximal degree in co-relation 337. Up to 16 conditions per place. [2020-10-09 18:22:25,698 INFO L132 encePairwiseOnDemand]: 82/87 looper letters, 7 selfloop transitions, 7 changer transitions 0/92 dead transitions. [2020-10-09 18:22:25,699 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 92 transitions, 230 flow [2020-10-09 18:22:25,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 18:22:25,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 18:22:25,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 562 transitions. [2020-10-09 18:22:25,703 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.922824302134647 [2020-10-09 18:22:25,703 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 562 transitions. [2020-10-09 18:22:25,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 562 transitions. [2020-10-09 18:22:25,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:22:25,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 562 transitions. [2020-10-09 18:22:25,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 18:22:25,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 18:22:25,709 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 18:22:25,709 INFO L185 Difference]: Start difference. First operand has 87 places, 85 transitions, 188 flow. Second operand 7 states and 562 transitions. [2020-10-09 18:22:25,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 92 transitions, 230 flow [2020-10-09 18:22:25,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 92 transitions, 224 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-09 18:22:25,714 INFO L241 Difference]: Finished difference. Result has 94 places, 90 transitions, 221 flow [2020-10-09 18:22:25,714 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=221, PETRI_PLACES=94, PETRI_TRANSITIONS=90} [2020-10-09 18:22:25,715 INFO L341 CegarLoopForPetriNet]: 84 programPoint places, 10 predicate places. [2020-10-09 18:22:25,715 INFO L481 AbstractCegarLoop]: Abstraction has has 94 places, 90 transitions, 221 flow [2020-10-09 18:22:25,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-09 18:22:25,715 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:22:25,715 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 18:22:25,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 18:22:25,935 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:22:25,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:22:25,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1714424421, now seen corresponding path program 1 times [2020-10-09 18:22:25,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:22:25,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556186556] [2020-10-09 18:22:25,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-09 18:22:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:22:26,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 18:22:26,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:22:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:22:26,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:22:26,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:22:26,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556186556] [2020-10-09 18:22:26,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:22:26,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-10-09 18:22:26,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127115824] [2020-10-09 18:22:26,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-09 18:22:26,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:22:26,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-09 18:22:26,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-09 18:22:26,193 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 87 [2020-10-09 18:22:26,196 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 90 transitions, 221 flow. Second operand 5 states. [2020-10-09 18:22:26,196 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:22:26,196 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 87 [2020-10-09 18:22:26,196 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:22:26,277 INFO L129 PetriNetUnfolder]: 11/274 cut-off events. [2020-10-09 18:22:26,278 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2020-10-09 18:22:26,280 INFO L80 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 274 events. 11/274 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1094 event pairs, 0 based on Foata normal form. 1/263 useless extension candidates. Maximal degree in co-relation 306. Up to 14 conditions per place. [2020-10-09 18:22:26,281 INFO L132 encePairwiseOnDemand]: 82/87 looper letters, 8 selfloop transitions, 4 changer transitions 0/93 dead transitions. [2020-10-09 18:22:26,281 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 93 transitions, 251 flow [2020-10-09 18:22:26,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-09 18:22:26,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-09 18:22:26,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 469 transitions. [2020-10-09 18:22:26,284 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8984674329501916 [2020-10-09 18:22:26,284 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 469 transitions. [2020-10-09 18:22:26,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 469 transitions. [2020-10-09 18:22:26,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:22:26,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 469 transitions. [2020-10-09 18:22:26,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-09 18:22:26,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-09 18:22:26,287 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-09 18:22:26,287 INFO L185 Difference]: Start difference. First operand has 94 places, 90 transitions, 221 flow. Second operand 6 states and 469 transitions. [2020-10-09 18:22:26,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 93 transitions, 251 flow [2020-10-09 18:22:26,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 93 transitions, 251 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 18:22:26,296 INFO L241 Difference]: Finished difference. Result has 103 places, 93 transitions, 250 flow [2020-10-09 18:22:26,296 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=250, PETRI_PLACES=103, PETRI_TRANSITIONS=93} [2020-10-09 18:22:26,297 INFO L341 CegarLoopForPetriNet]: 84 programPoint places, 19 predicate places. [2020-10-09 18:22:26,297 INFO L481 AbstractCegarLoop]: Abstraction has has 103 places, 93 transitions, 250 flow [2020-10-09 18:22:26,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-09 18:22:26,297 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:22:26,297 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 18:22:26,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 18:22:26,509 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:22:26,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:22:26,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1358757229, now seen corresponding path program 1 times [2020-10-09 18:22:26,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:22:26,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306225046] [2020-10-09 18:22:26,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-09 18:22:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:22:26,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 18:22:26,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:22:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:22:26,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:22:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:22:26,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306225046] [2020-10-09 18:22:26,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:22:26,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-10-09 18:22:26,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70934786] [2020-10-09 18:22:26,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-09 18:22:26,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:22:26,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-09 18:22:26,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-09 18:22:26,702 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 87 [2020-10-09 18:22:26,703 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 93 transitions, 250 flow. Second operand 5 states. [2020-10-09 18:22:26,703 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:22:26,703 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 87 [2020-10-09 18:22:26,704 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:22:26,844 INFO L129 PetriNetUnfolder]: 56/621 cut-off events. [2020-10-09 18:22:26,845 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2020-10-09 18:22:26,847 INFO L80 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 621 events. 56/621 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4508 event pairs, 0 based on Foata normal form. 0/574 useless extension candidates. Maximal degree in co-relation 788. Up to 73 conditions per place. [2020-10-09 18:22:26,848 INFO L132 encePairwiseOnDemand]: 80/87 looper letters, 6 selfloop transitions, 2 changer transitions 47/105 dead transitions. [2020-10-09 18:22:26,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 105 transitions, 318 flow [2020-10-09 18:22:26,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 18:22:26,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-09 18:22:26,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 624 transitions. [2020-10-09 18:22:26,851 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.896551724137931 [2020-10-09 18:22:26,851 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 624 transitions. [2020-10-09 18:22:26,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 624 transitions. [2020-10-09 18:22:26,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:22:26,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 624 transitions. [2020-10-09 18:22:26,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-09 18:22:26,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-09 18:22:26,855 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-09 18:22:26,855 INFO L185 Difference]: Start difference. First operand has 103 places, 93 transitions, 250 flow. Second operand 8 states and 624 transitions. [2020-10-09 18:22:26,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 105 transitions, 318 flow [2020-10-09 18:22:26,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 105 transitions, 317 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-09 18:22:26,860 INFO L241 Difference]: Finished difference. Result has 114 places, 58 transitions, 164 flow [2020-10-09 18:22:26,861 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=164, PETRI_PLACES=114, PETRI_TRANSITIONS=58} [2020-10-09 18:22:26,861 INFO L341 CegarLoopForPetriNet]: 84 programPoint places, 30 predicate places. [2020-10-09 18:22:26,861 INFO L481 AbstractCegarLoop]: Abstraction has has 114 places, 58 transitions, 164 flow [2020-10-09 18:22:26,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-09 18:22:26,861 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:22:26,862 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 18:22:27,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 18:22:27,075 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:22:27,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:22:27,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1730425637, now seen corresponding path program 1 times [2020-10-09 18:22:27,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:22:27,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135167597] [2020-10-09 18:22:27,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-09 18:22:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 18:22:27,138 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 18:22:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 18:22:27,157 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 18:22:27,199 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-10-09 18:22:27,200 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 18:22:27,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-09 18:22:27,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 06:22:27 BasicIcfg [2020-10-09 18:22:27,492 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 18:22:27,495 INFO L168 Benchmark]: Toolchain (without parser) took 4112.22 ms. Allocated memory was 253.8 MB in the beginning and 375.9 MB in the end (delta: 122.2 MB). Free memory was 209.1 MB in the beginning and 310.4 MB in the end (delta: -101.4 MB). Peak memory consumption was 20.8 MB. Max. memory is 14.2 GB. [2020-10-09 18:22:27,495 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 253.8 MB. Free memory is still 230.1 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 18:22:27,496 INFO L168 Benchmark]: CACSL2BoogieTranslator took 638.30 ms. Allocated memory was 253.8 MB in the beginning and 321.4 MB in the end (delta: 67.6 MB). Free memory was 209.1 MB in the beginning and 272.3 MB in the end (delta: -63.2 MB). Peak memory consumption was 26.8 MB. Max. memory is 14.2 GB. [2020-10-09 18:22:27,497 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.57 ms. Allocated memory is still 321.4 MB. Free memory was 272.3 MB in the beginning and 269.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 14.2 GB. [2020-10-09 18:22:27,497 INFO L168 Benchmark]: Boogie Preprocessor took 24.05 ms. Allocated memory is still 321.4 MB. Free memory is still 269.7 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 18:22:27,498 INFO L168 Benchmark]: RCFGBuilder took 441.77 ms. Allocated memory is still 321.4 MB. Free memory was 269.7 MB in the beginning and 242.8 MB in the end (delta: 26.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 14.2 GB. [2020-10-09 18:22:27,499 INFO L168 Benchmark]: TraceAbstraction took 2927.38 ms. Allocated memory was 321.4 MB in the beginning and 375.9 MB in the end (delta: 54.5 MB). Free memory was 242.8 MB in the beginning and 310.4 MB in the end (delta: -67.6 MB). There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 18:22:27,503 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 253.8 MB. Free memory is still 230.1 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 638.30 ms. Allocated memory was 253.8 MB in the beginning and 321.4 MB in the end (delta: 67.6 MB). Free memory was 209.1 MB in the beginning and 272.3 MB in the end (delta: -63.2 MB). Peak memory consumption was 26.8 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 75.57 ms. Allocated memory is still 321.4 MB. Free memory was 272.3 MB in the beginning and 269.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 24.05 ms. Allocated memory is still 321.4 MB. Free memory is still 269.7 MB. There was no memory consumed. Max. memory is 14.2 GB. * RCFGBuilder took 441.77 ms. Allocated memory is still 321.4 MB. Free memory was 269.7 MB in the beginning and 242.8 MB in the end (delta: 26.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 14.2 GB. * TraceAbstraction took 2927.38 ms. Allocated memory was 321.4 MB in the beginning and 375.9 MB in the end (delta: 54.5 MB). Free memory was 242.8 MB in the beginning and 310.4 MB in the end (delta: -67.6 MB). There was no memory consumed. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 679]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L686] 0 volatile int stoppingFlag; VAL [stoppingFlag=0] [L687] 0 volatile int pendingIo; VAL [pendingIo=0, stoppingFlag=0] [L688] 0 volatile int stoppingEvent; VAL [pendingIo=0, stoppingEvent=0, stoppingFlag=0] [L689] 0 volatile int stopped; VAL [pendingIo=0, stopped=0, stoppingEvent=0, stoppingFlag=0] [L729] 0 pthread_t t; VAL [pendingIo=0, stopped=0, stoppingEvent=0, stoppingFlag=0] [L730] 0 pendingIo = 1 VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=0] [L731] 0 stoppingFlag = 0 VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=0] [L732] 0 stoppingEvent = 0 VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=0] [L733] 0 stopped = 0 VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=0] [L734] FCALL, FORK 0 pthread_create(&t, 0, BCSP_PnpStop, 0) VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=0] [L713] 0 int status; VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=0] [L691] COND FALSE 0 !(\read(stoppingFlag)) VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=0] [L722] 1 stoppingFlag = 1 VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=1] [L706] 1 int pending; VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=1] [L700] 1 pendingIo-- [L701] 1 int tmp = pendingIo; VAL [pendingIo=0, stopped=0, stoppingEvent=0, stoppingFlag=1] [L703] 1 return tmp; VAL [pendingIo=0, stopped=0, stoppingEvent=0, stoppingFlag=1] [L707] 1 pending = dec() VAL [pendingIo=0, stopped=0, stoppingEvent=0, stoppingFlag=1] [L708] COND TRUE 1 pending == 0 VAL [pendingIo=0, stopped=0, stoppingEvent=0, stoppingFlag=1] [L709] 1 stoppingEvent = 1 VAL [pendingIo=0, stopped=0, stoppingEvent=1, stoppingFlag=1] [L675] COND FALSE 1 !(!cond) VAL [pendingIo=0, stopped=0, stoppingEvent=1, stoppingFlag=1] [L725] 1 stopped = 1 VAL [pendingIo=0, stopped=1, stoppingEvent=1, stoppingFlag=1] [L694] 0 pendingIo = pendingIo + 1 VAL [pendingIo=1, stopped=1, stoppingEvent=1, stoppingFlag=1] [L696] 0 return 0; VAL [pendingIo=1, stopped=1, stoppingEvent=1, stoppingFlag=1] [L714] 0 status = BCSP_IoIncrement() VAL [pendingIo=1, stopped=1, stoppingEvent=1, stoppingFlag=1] [L715] COND TRUE 0 status == 0 VAL [pendingIo=1, stopped=1, stoppingEvent=1, stoppingFlag=1] [L678] COND TRUE 0 !(cond) VAL [pendingIo=1, stopped=1, stoppingEvent=1, stoppingFlag=1] [L679] 0 __VERIFIER_error() VAL [pendingIo=1, stopped=1, stoppingEvent=1, stoppingFlag=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 82 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 2.7s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 35 SDtfs, 48 SDslu, 61 SDs, 0 SdLazy, 83 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 357 GetRequests, 333 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=250occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 233 NumberOfCodeBlocks, 233 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 348 ConstructedInterpolants, 0 QuantifiedInterpolants, 28376 SizeOfPredicates, 8 NumberOfNonLiveVariables, 366 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...