/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-wmm/safe013_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 17:46:53,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 17:46:53,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 17:46:53,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 17:46:53,092 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 17:46:53,093 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 17:46:53,094 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 17:46:53,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 17:46:53,097 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 17:46:53,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 17:46:53,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 17:46:53,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 17:46:53,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 17:46:53,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 17:46:53,102 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 17:46:53,103 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 17:46:53,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 17:46:53,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 17:46:53,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 17:46:53,108 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 17:46:53,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 17:46:53,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 17:46:53,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 17:46:53,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 17:46:53,115 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 17:46:53,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 17:46:53,115 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 17:46:53,116 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 17:46:53,117 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 17:46:53,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 17:46:53,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 17:46:53,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 17:46:53,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 17:46:53,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 17:46:53,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 17:46:53,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 17:46:53,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 17:46:53,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 17:46:53,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 17:46:53,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 17:46:53,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 17:46:53,124 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 17:46:53,145 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 17:46:53,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 17:46:53,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 17:46:53,147 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 17:46:53,147 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 17:46:53,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 17:46:53,147 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 17:46:53,148 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 17:46:53,148 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 17:46:53,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 17:46:53,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 17:46:53,148 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 17:46:53,148 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 17:46:53,149 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 17:46:53,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 17:46:53,149 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 17:46:53,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 17:46:53,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 17:46:53,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 17:46:53,150 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 17:46:53,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 17:46:53,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 17:46:53,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 17:46:53,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 17:46:53,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 17:46:53,151 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 17:46:53,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 17:46:53,151 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 17:46:53,152 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 17:46:53,152 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 17:46:53,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 17:46:53,454 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 17:46:53,458 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 17:46:53,460 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 17:46:53,461 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 17:46:53,462 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe013_tso.opt.i [2020-10-09 17:46:53,529 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/115679249/43ed2aea226c4f1d8c91f29f258003fc/FLAGdf93703d6 [2020-10-09 17:46:54,040 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 17:46:54,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe013_tso.opt.i [2020-10-09 17:46:54,061 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/115679249/43ed2aea226c4f1d8c91f29f258003fc/FLAGdf93703d6 [2020-10-09 17:46:54,364 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/115679249/43ed2aea226c4f1d8c91f29f258003fc [2020-10-09 17:46:54,372 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 17:46:54,374 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 17:46:54,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 17:46:54,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 17:46:54,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 17:46:54,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:46:54" (1/1) ... [2020-10-09 17:46:54,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@122f49bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:54, skipping insertion in model container [2020-10-09 17:46:54,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:46:54" (1/1) ... [2020-10-09 17:46:54,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 17:46:54,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 17:46:54,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:46:54,943 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 17:46:55,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:46:55,096 INFO L208 MainTranslator]: Completed translation [2020-10-09 17:46:55,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:55 WrapperNode [2020-10-09 17:46:55,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 17:46:55,098 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 17:46:55,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 17:46:55,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 17:46:55,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:55" (1/1) ... [2020-10-09 17:46:55,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:55" (1/1) ... [2020-10-09 17:46:55,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 17:46:55,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 17:46:55,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 17:46:55,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 17:46:55,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:55" (1/1) ... [2020-10-09 17:46:55,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:55" (1/1) ... [2020-10-09 17:46:55,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:55" (1/1) ... [2020-10-09 17:46:55,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:55" (1/1) ... [2020-10-09 17:46:55,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:55" (1/1) ... [2020-10-09 17:46:55,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:55" (1/1) ... [2020-10-09 17:46:55,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:55" (1/1) ... [2020-10-09 17:46:55,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 17:46:55,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 17:46:55,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 17:46:55,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 17:46:55,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:55" (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 17:46:55,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 17:46:55,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 17:46:55,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 17:46:55,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 17:46:55,248 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-09 17:46:55,248 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-09 17:46:55,249 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-09 17:46:55,249 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-09 17:46:55,249 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-10-09 17:46:55,249 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-10-09 17:46:55,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 17:46:55,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 17:46:55,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 17:46:55,251 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 17:46:55,609 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 17:46:55,610 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-09 17:46:55,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:46:55 BoogieIcfgContainer [2020-10-09 17:46:55,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 17:46:55,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 17:46:55,614 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 17:46:55,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 17:46:55,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 05:46:54" (1/3) ... [2020-10-09 17:46:55,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2170f9ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:46:55, skipping insertion in model container [2020-10-09 17:46:55,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:55" (2/3) ... [2020-10-09 17:46:55,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2170f9ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:46:55, skipping insertion in model container [2020-10-09 17:46:55,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:46:55" (3/3) ... [2020-10-09 17:46:55,621 INFO L111 eAbstractionObserver]: Analyzing ICFG safe013_tso.opt.i [2020-10-09 17:46:55,634 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 17:46:55,643 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 17:46:55,644 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 17:46:55,675 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,675 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,676 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,676 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,681 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,681 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,682 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,682 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,682 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,682 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,683 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,683 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,683 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,684 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,684 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,684 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,684 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,685 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,693 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,694 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,697 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,697 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,707 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,707 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,708 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,708 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,711 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,711 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,711 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,711 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:55,730 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-09 17:46:55,749 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 17:46:55,749 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 17:46:55,750 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 17:46:55,750 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 17:46:55,750 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 17:46:55,750 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 17:46:55,750 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 17:46:55,750 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 17:46:55,764 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 70 transitions, 155 flow [2020-10-09 17:46:55,814 INFO L129 PetriNetUnfolder]: 2/67 cut-off events. [2020-10-09 17:46:55,814 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:46:55,819 INFO L80 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 67 events. 2/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2020-10-09 17:46:55,820 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 70 transitions, 155 flow [2020-10-09 17:46:55,826 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 56 transitions, 121 flow [2020-10-09 17:46:55,846 INFO L129 PetriNetUnfolder]: 1/55 cut-off events. [2020-10-09 17:46:55,846 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:46:55,847 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:46:55,848 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 17:46:55,848 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:46:55,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:46:55,855 INFO L82 PathProgramCache]: Analyzing trace with hash 257296303, now seen corresponding path program 1 times [2020-10-09 17:46:55,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:46:55,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046709342] [2020-10-09 17:46:55,870 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 17:46:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:46:55,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:46:55,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:46:56,064 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:46:56,107 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 17:46:56,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:46:56,184 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 17:46:56,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046709342] [2020-10-09 17:46:56,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:46:56,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:46:56,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252265822] [2020-10-09 17:46:56,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:46:56,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:46:56,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:46:56,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:46:56,492 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 70 [2020-10-09 17:46:56,496 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 121 flow. Second operand 8 states. [2020-10-09 17:46:56,497 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:46:56,497 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 70 [2020-10-09 17:46:56,499 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:46:56,631 INFO L129 PetriNetUnfolder]: 3/70 cut-off events. [2020-10-09 17:46:56,632 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:46:56,632 INFO L80 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 70 events. 3/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 96 event pairs, 0 based on Foata normal form. 4/73 useless extension candidates. Maximal degree in co-relation 75. Up to 7 conditions per place. [2020-10-09 17:46:56,634 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 6 selfloop transitions, 2 changer transitions 11/65 dead transitions. [2020-10-09 17:46:56,634 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 65 transitions, 175 flow [2020-10-09 17:46:56,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 17:46:56,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 17:46:56,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 562 transitions. [2020-10-09 17:46:56,653 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8920634920634921 [2020-10-09 17:46:56,654 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 562 transitions. [2020-10-09 17:46:56,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 562 transitions. [2020-10-09 17:46:56,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:46:56,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 562 transitions. [2020-10-09 17:46:56,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 17:46:56,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 17:46:56,675 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 17:46:56,677 INFO L185 Difference]: Start difference. First operand has 65 places, 56 transitions, 121 flow. Second operand 9 states and 562 transitions. [2020-10-09 17:46:56,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 65 transitions, 175 flow [2020-10-09 17:46:56,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 65 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-09 17:46:56,687 INFO L241 Difference]: Finished difference. Result has 77 places, 54 transitions, 134 flow [2020-10-09 17:46:56,690 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=134, PETRI_PLACES=77, PETRI_TRANSITIONS=54} [2020-10-09 17:46:56,691 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 12 predicate places. [2020-10-09 17:46:56,691 INFO L481 AbstractCegarLoop]: Abstraction has has 77 places, 54 transitions, 134 flow [2020-10-09 17:46:56,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:46:56,692 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:46:56,692 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] [2020-10-09 17:46:56,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 17:46:56,904 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:46:56,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:46:56,905 INFO L82 PathProgramCache]: Analyzing trace with hash 905544240, now seen corresponding path program 1 times [2020-10-09 17:46:56,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:46:56,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122004658] [2020-10-09 17:46:56,908 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 17:46:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:46:56,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:46:56,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:46:56,990 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:46:57,022 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 17:46:57,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:46:57,067 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 17:46:57,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122004658] [2020-10-09 17:46:57,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:46:57,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:46:57,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842604294] [2020-10-09 17:46:57,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:46:57,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:46:57,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:46:57,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:46:57,237 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 70 [2020-10-09 17:46:57,238 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 54 transitions, 134 flow. Second operand 8 states. [2020-10-09 17:46:57,238 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:46:57,239 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 70 [2020-10-09 17:46:57,239 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:46:57,388 INFO L129 PetriNetUnfolder]: 18/135 cut-off events. [2020-10-09 17:46:57,388 INFO L130 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2020-10-09 17:46:57,390 INFO L80 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 135 events. 18/135 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 440 event pairs, 0 based on Foata normal form. 5/138 useless extension candidates. Maximal degree in co-relation 227. Up to 15 conditions per place. [2020-10-09 17:46:57,391 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 10 selfloop transitions, 5 changer transitions 23/83 dead transitions. [2020-10-09 17:46:57,391 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 83 transitions, 308 flow [2020-10-09 17:46:57,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 17:46:57,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-09 17:46:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 808 transitions. [2020-10-09 17:46:57,395 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8879120879120879 [2020-10-09 17:46:57,395 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 808 transitions. [2020-10-09 17:46:57,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 808 transitions. [2020-10-09 17:46:57,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:46:57,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 808 transitions. [2020-10-09 17:46:57,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-09 17:46:57,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-09 17:46:57,400 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-09 17:46:57,400 INFO L185 Difference]: Start difference. First operand has 77 places, 54 transitions, 134 flow. Second operand 13 states and 808 transitions. [2020-10-09 17:46:57,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 83 transitions, 308 flow [2020-10-09 17:46:57,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 83 transitions, 256 flow, removed 24 selfloop flow, removed 8 redundant places. [2020-10-09 17:46:57,406 INFO L241 Difference]: Finished difference. Result has 85 places, 56 transitions, 160 flow [2020-10-09 17:46:57,406 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=160, PETRI_PLACES=85, PETRI_TRANSITIONS=56} [2020-10-09 17:46:57,407 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 20 predicate places. [2020-10-09 17:46:57,407 INFO L481 AbstractCegarLoop]: Abstraction has has 85 places, 56 transitions, 160 flow [2020-10-09 17:46:57,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:46:57,407 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:46:57,407 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] [2020-10-09 17:46:57,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 17:46:57,629 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:46:57,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:46:57,629 INFO L82 PathProgramCache]: Analyzing trace with hash -887482383, now seen corresponding path program 1 times [2020-10-09 17:46:57,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:46:57,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390859424] [2020-10-09 17:46:57,631 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 17:46:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:46:57,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:46:57,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:46:57,717 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:46:57,744 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 17:46:57,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:46:57,790 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 17:46:57,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390859424] [2020-10-09 17:46:57,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:46:57,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:46:57,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072100378] [2020-10-09 17:46:57,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:46:57,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:46:57,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:46:57,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:46:58,029 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2020-10-09 17:46:58,029 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 56 transitions, 160 flow. Second operand 9 states. [2020-10-09 17:46:58,030 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:46:58,030 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2020-10-09 17:46:58,030 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:46:58,170 INFO L129 PetriNetUnfolder]: 8/123 cut-off events. [2020-10-09 17:46:58,170 INFO L130 PetriNetUnfolder]: For 107/125 co-relation queries the response was YES. [2020-10-09 17:46:58,171 INFO L80 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 123 events. 8/123 cut-off events. For 107/125 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 428 event pairs, 0 based on Foata normal form. 4/125 useless extension candidates. Maximal degree in co-relation 236. Up to 12 conditions per place. [2020-10-09 17:46:58,172 INFO L132 encePairwiseOnDemand]: 62/70 looper letters, 6 selfloop transitions, 4 changer transitions 12/68 dead transitions. [2020-10-09 17:46:58,172 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 68 transitions, 265 flow [2020-10-09 17:46:58,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 17:46:58,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-09 17:46:58,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 604 transitions. [2020-10-09 17:46:58,175 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8628571428571429 [2020-10-09 17:46:58,175 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 604 transitions. [2020-10-09 17:46:58,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 604 transitions. [2020-10-09 17:46:58,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:46:58,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 604 transitions. [2020-10-09 17:46:58,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-09 17:46:58,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-09 17:46:58,180 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-09 17:46:58,180 INFO L185 Difference]: Start difference. First operand has 85 places, 56 transitions, 160 flow. Second operand 10 states and 604 transitions. [2020-10-09 17:46:58,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 68 transitions, 265 flow [2020-10-09 17:46:58,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 68 transitions, 223 flow, removed 21 selfloop flow, removed 9 redundant places. [2020-10-09 17:46:58,184 INFO L241 Difference]: Finished difference. Result has 84 places, 56 transitions, 172 flow [2020-10-09 17:46:58,185 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=172, PETRI_PLACES=84, PETRI_TRANSITIONS=56} [2020-10-09 17:46:58,185 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 19 predicate places. [2020-10-09 17:46:58,185 INFO L481 AbstractCegarLoop]: Abstraction has has 84 places, 56 transitions, 172 flow [2020-10-09 17:46:58,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:46:58,185 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:46:58,186 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] [2020-10-09 17:46:58,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 17:46:58,398 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:46:58,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:46:58,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1967919300, now seen corresponding path program 1 times [2020-10-09 17:46:58,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:46:58,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397347083] [2020-10-09 17:46:58,399 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 17:46:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:46:58,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 17:46:58,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:46:58,474 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:46:58,500 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 17:46:58,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:46:58,526 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 17:46:58,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397347083] [2020-10-09 17:46:58,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:46:58,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:46:58,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638420039] [2020-10-09 17:46:58,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:46:58,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:46:58,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:46:58,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:46:58,609 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 70 [2020-10-09 17:46:58,609 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 56 transitions, 172 flow. Second operand 8 states. [2020-10-09 17:46:58,609 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:46:58,610 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 70 [2020-10-09 17:46:58,610 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:46:58,816 INFO L129 PetriNetUnfolder]: 124/354 cut-off events. [2020-10-09 17:46:58,816 INFO L130 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2020-10-09 17:46:58,819 INFO L80 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 354 events. 124/354 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 1949 event pairs, 0 based on Foata normal form. 14/349 useless extension candidates. Maximal degree in co-relation 648. Up to 72 conditions per place. [2020-10-09 17:46:58,821 INFO L132 encePairwiseOnDemand]: 61/70 looper letters, 10 selfloop transitions, 9 changer transitions 29/94 dead transitions. [2020-10-09 17:46:58,821 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 94 transitions, 344 flow [2020-10-09 17:46:58,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 17:46:58,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-09 17:46:58,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 735 transitions. [2020-10-09 17:46:58,826 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.875 [2020-10-09 17:46:58,827 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 735 transitions. [2020-10-09 17:46:58,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 735 transitions. [2020-10-09 17:46:58,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:46:58,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 735 transitions. [2020-10-09 17:46:58,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-09 17:46:58,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-09 17:46:58,831 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-09 17:46:58,831 INFO L185 Difference]: Start difference. First operand has 84 places, 56 transitions, 172 flow. Second operand 12 states and 735 transitions. [2020-10-09 17:46:58,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 94 transitions, 344 flow [2020-10-09 17:46:58,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 94 transitions, 313 flow, removed 9 selfloop flow, removed 11 redundant places. [2020-10-09 17:46:58,836 INFO L241 Difference]: Finished difference. Result has 87 places, 62 transitions, 239 flow [2020-10-09 17:46:58,836 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=239, PETRI_PLACES=87, PETRI_TRANSITIONS=62} [2020-10-09 17:46:58,837 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 22 predicate places. [2020-10-09 17:46:58,837 INFO L481 AbstractCegarLoop]: Abstraction has has 87 places, 62 transitions, 239 flow [2020-10-09 17:46:58,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:46:58,837 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:46:58,837 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] [2020-10-09 17:46:59,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 17:46:59,054 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:46:59,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:46:59,054 INFO L82 PathProgramCache]: Analyzing trace with hash 163706384, now seen corresponding path program 1 times [2020-10-09 17:46:59,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:46:59,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329989736] [2020-10-09 17:46:59,055 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 17:46:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:46:59,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:46:59,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:46:59,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:46:59,168 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 17:46:59,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:46:59,211 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 17:46:59,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329989736] [2020-10-09 17:46:59,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:46:59,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:46:59,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658093545] [2020-10-09 17:46:59,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:46:59,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:46:59,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:46:59,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:46:59,397 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2020-10-09 17:46:59,398 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 62 transitions, 239 flow. Second operand 9 states. [2020-10-09 17:46:59,398 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:46:59,399 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2020-10-09 17:46:59,399 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:46:59,576 INFO L129 PetriNetUnfolder]: 46/268 cut-off events. [2020-10-09 17:46:59,576 INFO L130 PetriNetUnfolder]: For 663/682 co-relation queries the response was YES. [2020-10-09 17:46:59,578 INFO L80 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 268 events. 46/268 cut-off events. For 663/682 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1311 event pairs, 9 based on Foata normal form. 8/270 useless extension candidates. Maximal degree in co-relation 762. Up to 74 conditions per place. [2020-10-09 17:46:59,579 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 13 selfloop transitions, 2 changer transitions 5/71 dead transitions. [2020-10-09 17:46:59,579 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 71 transitions, 299 flow [2020-10-09 17:46:59,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 17:46:59,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 17:46:59,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 426 transitions. [2020-10-09 17:46:59,582 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8693877551020408 [2020-10-09 17:46:59,582 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 426 transitions. [2020-10-09 17:46:59,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 426 transitions. [2020-10-09 17:46:59,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:46:59,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 426 transitions. [2020-10-09 17:46:59,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 17:46:59,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 17:46:59,585 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 17:46:59,585 INFO L185 Difference]: Start difference. First operand has 87 places, 62 transitions, 239 flow. Second operand 7 states and 426 transitions. [2020-10-09 17:46:59,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 71 transitions, 299 flow [2020-10-09 17:46:59,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 71 transitions, 269 flow, removed 11 selfloop flow, removed 7 redundant places. [2020-10-09 17:46:59,590 INFO L241 Difference]: Finished difference. Result has 85 places, 62 transitions, 218 flow [2020-10-09 17:46:59,591 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=218, PETRI_PLACES=85, PETRI_TRANSITIONS=62} [2020-10-09 17:46:59,591 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 20 predicate places. [2020-10-09 17:46:59,591 INFO L481 AbstractCegarLoop]: Abstraction has has 85 places, 62 transitions, 218 flow [2020-10-09 17:46:59,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:46:59,591 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:46:59,592 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] [2020-10-09 17:46:59,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-09 17:46:59,804 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:46:59,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:46:59,805 INFO L82 PathProgramCache]: Analyzing trace with hash -946961100, now seen corresponding path program 2 times [2020-10-09 17:46:59,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:46:59,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035442268] [2020-10-09 17:46:59,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-10-09 17:46:59,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 17:46:59,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 17:46:59,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 17:46:59,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:46:59,882 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:46:59,908 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 17:46:59,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:46:59,945 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 17:46:59,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035442268] [2020-10-09 17:46:59,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:46:59,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2020-10-09 17:46:59,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110789254] [2020-10-09 17:46:59,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 17:46:59,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:46:59,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 17:46:59,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-09 17:47:00,042 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 70 [2020-10-09 17:47:00,043 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 62 transitions, 218 flow. Second operand 10 states. [2020-10-09 17:47:00,043 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:47:00,043 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 70 [2020-10-09 17:47:00,043 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:47:00,221 INFO L129 PetriNetUnfolder]: 33/204 cut-off events. [2020-10-09 17:47:00,221 INFO L130 PetriNetUnfolder]: For 304/380 co-relation queries the response was YES. [2020-10-09 17:47:00,223 INFO L80 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 204 events. 33/204 cut-off events. For 304/380 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1050 event pairs, 0 based on Foata normal form. 40/240 useless extension candidates. Maximal degree in co-relation 568. Up to 64 conditions per place. [2020-10-09 17:47:00,225 INFO L132 encePairwiseOnDemand]: 61/70 looper letters, 0 selfloop transitions, 0 changer transitions 67/67 dead transitions. [2020-10-09 17:47:00,225 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 67 transitions, 313 flow [2020-10-09 17:47:00,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 17:47:00,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-09 17:47:00,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 655 transitions. [2020-10-09 17:47:00,228 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8506493506493507 [2020-10-09 17:47:00,228 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 655 transitions. [2020-10-09 17:47:00,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 655 transitions. [2020-10-09 17:47:00,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:47:00,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 655 transitions. [2020-10-09 17:47:00,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-09 17:47:00,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-09 17:47:00,233 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-09 17:47:00,233 INFO L185 Difference]: Start difference. First operand has 85 places, 62 transitions, 218 flow. Second operand 11 states and 655 transitions. [2020-10-09 17:47:00,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 67 transitions, 313 flow [2020-10-09 17:47:00,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 67 transitions, 294 flow, removed 6 selfloop flow, removed 4 redundant places. [2020-10-09 17:47:00,237 INFO L241 Difference]: Finished difference. Result has 82 places, 0 transitions, 0 flow [2020-10-09 17:47:00,238 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=82, PETRI_TRANSITIONS=0} [2020-10-09 17:47:00,238 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 17 predicate places. [2020-10-09 17:47:00,240 INFO L481 AbstractCegarLoop]: Abstraction has has 82 places, 0 transitions, 0 flow [2020-10-09 17:47:00,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 17:47:00,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-09 17:47:00,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 05:47:00 BasicIcfg [2020-10-09 17:47:00,459 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 17:47:00,462 INFO L168 Benchmark]: Toolchain (without parser) took 6087.14 ms. Allocated memory was 249.6 MB in the beginning and 421.5 MB in the end (delta: 172.0 MB). Free memory was 204.7 MB in the beginning and 292.8 MB in the end (delta: -88.1 MB). Peak memory consumption was 83.9 MB. Max. memory is 14.2 GB. [2020-10-09 17:47:00,462 INFO L168 Benchmark]: CDTParser took 1.25 ms. Allocated memory is still 249.6 MB. Free memory is still 225.9 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 17:47:00,463 INFO L168 Benchmark]: CACSL2BoogieTranslator took 722.55 ms. Allocated memory was 249.6 MB in the beginning and 309.3 MB in the end (delta: 59.8 MB). Free memory was 204.7 MB in the beginning and 260.2 MB in the end (delta: -55.5 MB). Peak memory consumption was 26.9 MB. Max. memory is 14.2 GB. [2020-10-09 17:47:00,464 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.21 ms. Allocated memory is still 309.3 MB. Free memory was 260.2 MB in the beginning and 257.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 17:47:00,465 INFO L168 Benchmark]: Boogie Preprocessor took 25.44 ms. Allocated memory is still 309.3 MB. Free memory was 257.7 MB in the beginning and 255.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 17:47:00,466 INFO L168 Benchmark]: RCFGBuilder took 440.53 ms. Allocated memory is still 309.3 MB. Free memory was 255.1 MB in the beginning and 233.3 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-09 17:47:00,466 INFO L168 Benchmark]: TraceAbstraction took 4845.25 ms. Allocated memory was 309.3 MB in the beginning and 421.5 MB in the end (delta: 112.2 MB). Free memory was 233.3 MB in the beginning and 292.8 MB in the end (delta: -59.5 MB). Peak memory consumption was 52.7 MB. Max. memory is 14.2 GB. [2020-10-09 17:47:00,471 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.25 ms. Allocated memory is still 249.6 MB. Free memory is still 225.9 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 722.55 ms. Allocated memory was 249.6 MB in the beginning and 309.3 MB in the end (delta: 59.8 MB). Free memory was 204.7 MB in the beginning and 260.2 MB in the end (delta: -55.5 MB). Peak memory consumption was 26.9 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 48.21 ms. Allocated memory is still 309.3 MB. Free memory was 260.2 MB in the beginning and 257.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 25.44 ms. Allocated memory is still 309.3 MB. Free memory was 257.7 MB in the beginning and 255.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 440.53 ms. Allocated memory is still 309.3 MB. Free memory was 255.1 MB in the beginning and 233.3 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 4845.25 ms. Allocated memory was 309.3 MB in the beginning and 421.5 MB in the end (delta: 112.2 MB). Free memory was 233.3 MB in the beginning and 292.8 MB in the end (delta: -59.5 MB). Peak memory consumption was 52.7 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 69 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: SAFE, OverallTime: 4.7s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 47 SDtfs, 250 SDslu, 390 SDs, 0 SdLazy, 400 SolverSat, 82 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 525 GetRequests, 434 SyntacticMatches, 12 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=239occurred in iteration=4, 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, 0.6s InterpolantComputationTime, 249 NumberOfCodeBlocks, 249 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 486 ConstructedInterpolants, 0 QuantifiedInterpolants, 51256 SizeOfPredicates, 40 NumberOfNonLiveVariables, 642 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 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 correct! Received shutdown request...