/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/fkp2013_variant-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-11 18:49:19,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-11 18:49:19,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-11 18:49:19,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-11 18:49:19,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-11 18:49:19,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-11 18:49:19,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-11 18:49:19,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-11 18:49:19,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-11 18:49:19,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-11 18:49:19,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-11 18:49:19,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-11 18:49:19,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-11 18:49:19,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-11 18:49:19,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-11 18:49:19,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-11 18:49:19,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-11 18:49:19,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-11 18:49:20,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-11 18:49:20,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-11 18:49:20,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-11 18:49:20,010 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-11 18:49:20,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-11 18:49:20,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-11 18:49:20,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-11 18:49:20,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-11 18:49:20,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-11 18:49:20,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-11 18:49:20,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-11 18:49:20,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-11 18:49:20,031 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-11 18:49:20,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-11 18:49:20,032 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-11 18:49:20,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-11 18:49:20,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-11 18:49:20,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-11 18:49:20,034 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-11 18:49:20,076 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-11 18:49:20,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-11 18:49:20,077 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-11 18:49:20,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-11 18:49:20,078 INFO L138 SettingsManager]: * Use SBE=true [2020-10-11 18:49:20,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-11 18:49:20,078 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-11 18:49:20,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-11 18:49:20,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-11 18:49:20,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-11 18:49:20,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-11 18:49:20,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-11 18:49:20,079 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-11 18:49:20,080 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-11 18:49:20,080 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-11 18:49:20,080 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-11 18:49:20,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-11 18:49:20,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-11 18:49:20,081 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-11 18:49:20,081 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-11 18:49:20,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-11 18:49:20,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 18:49:20,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-11 18:49:20,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-11 18:49:20,082 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-11 18:49:20,082 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-11 18:49:20,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-11 18:49:20,082 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-11 18:49:20,083 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-11 18:49:20,083 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-11 18:49:20,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-11 18:49:20,389 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-11 18:49:20,392 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-11 18:49:20,393 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-11 18:49:20,394 INFO L275 PluginConnector]: CDTParser initialized [2020-10-11 18:49:20,394 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-lit/fkp2013_variant-1.i [2020-10-11 18:49:20,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08ba32817/cd0bf7b004734858a4ea1c7690485c94/FLAG3ae8a758d [2020-10-11 18:49:20,944 INFO L306 CDTParser]: Found 1 translation units. [2020-10-11 18:49:20,945 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-lit/fkp2013_variant-1.i [2020-10-11 18:49:20,969 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08ba32817/cd0bf7b004734858a4ea1c7690485c94/FLAG3ae8a758d [2020-10-11 18:49:21,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08ba32817/cd0bf7b004734858a4ea1c7690485c94 [2020-10-11 18:49:21,229 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-11 18:49:21,231 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-11 18:49:21,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-11 18:49:21,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-11 18:49:21,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-11 18:49:21,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 06:49:21" (1/1) ... [2020-10-11 18:49:21,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e6433b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:49:21, skipping insertion in model container [2020-10-11 18:49:21,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 06:49:21" (1/1) ... [2020-10-11 18:49:21,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-11 18:49:21,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-11 18:49:21,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 18:49:21,767 INFO L203 MainTranslator]: Completed pre-run [2020-10-11 18:49:21,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 18:49:21,920 INFO L208 MainTranslator]: Completed translation [2020-10-11 18:49:21,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:49:21 WrapperNode [2020-10-11 18:49:21,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-11 18:49:21,922 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-11 18:49:21,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-11 18:49:21,923 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-11 18:49:21,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:49:21" (1/1) ... [2020-10-11 18:49:21,947 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:49:21" (1/1) ... [2020-10-11 18:49:21,968 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-11 18:49:21,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-11 18:49:21,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-11 18:49:21,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-11 18:49:21,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:49:21" (1/1) ... [2020-10-11 18:49:21,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:49:21" (1/1) ... [2020-10-11 18:49:21,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:49:21" (1/1) ... [2020-10-11 18:49:21,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:49:21" (1/1) ... [2020-10-11 18:49:21,984 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:49:21" (1/1) ... [2020-10-11 18:49:21,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:49:21" (1/1) ... [2020-10-11 18:49:21,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:49:21" (1/1) ... [2020-10-11 18:49:21,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-11 18:49:21,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-11 18:49:21,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-11 18:49:21,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-11 18:49:21,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:49:21" (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 [2020-10-11 18:49:22,046 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2020-10-11 18:49:22,046 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2020-10-11 18:49:22,047 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-10-11 18:49:22,047 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-10-11 18:49:22,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-11 18:49:22,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-11 18:49:22,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-11 18:49:22,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-11 18:49:22,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-11 18:49:22,049 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-11 18:49:22,369 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-11 18:49:22,369 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-11 18:49:22,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 06:49:22 BoogieIcfgContainer [2020-10-11 18:49:22,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-11 18:49:22,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-11 18:49:22,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-11 18:49:22,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-11 18:49:22,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 06:49:21" (1/3) ... [2020-10-11 18:49:22,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c5502ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 06:49:22, skipping insertion in model container [2020-10-11 18:49:22,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:49:21" (2/3) ... [2020-10-11 18:49:22,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c5502ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 06:49:22, skipping insertion in model container [2020-10-11 18:49:22,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 06:49:22" (3/3) ... [2020-10-11 18:49:22,378 INFO L111 eAbstractionObserver]: Analyzing ICFG fkp2013_variant-1.i [2020-10-11 18:49:22,389 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-11 18:49:22,396 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-11 18:49:22,397 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-11 18:49:22,421 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,421 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,421 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,421 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,422 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,422 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,422 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,422 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,423 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,423 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,423 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,424 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,424 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,424 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,424 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,424 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,425 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,425 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,425 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,425 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,426 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,431 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,431 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,431 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,431 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,432 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,432 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,446 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,446 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,446 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,446 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,447 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:22,461 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-11 18:49:22,478 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 18:49:22,478 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 18:49:22,478 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 18:49:22,479 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 18:49:22,479 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 18:49:22,479 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 18:49:22,479 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 18:49:22,479 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 18:49:22,491 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 64 places, 61 transitions, 132 flow [2020-10-11 18:49:22,532 INFO L129 PetriNetUnfolder]: 4/71 cut-off events. [2020-10-11 18:49:22,532 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 18:49:22,538 INFO L80 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 71 events. 4/71 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 94 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2020-10-11 18:49:22,538 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 61 transitions, 132 flow [2020-10-11 18:49:22,544 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 60 transitions, 128 flow [2020-10-11 18:49:22,559 INFO L129 PetriNetUnfolder]: 3/43 cut-off events. [2020-10-11 18:49:22,560 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 18:49:22,563 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 18:49:22,564 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] [2020-10-11 18:49:22,564 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 18:49:22,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 18:49:22,571 INFO L82 PathProgramCache]: Analyzing trace with hash -305173420, now seen corresponding path program 1 times [2020-10-11 18:49:22,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 18:49:22,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779126511] [2020-10-11 18:49:22,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 18:49:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 18:49:22,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 18:49:22,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779126511] [2020-10-11 18:49:22,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 18:49:22,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-11 18:49:22,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905048169] [2020-10-11 18:49:22,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 18:49:22,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 18:49:22,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 18:49:22,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-11 18:49:23,590 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 61 [2020-10-11 18:49:23,592 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 128 flow. Second operand 8 states. [2020-10-11 18:49:23,592 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 18:49:23,593 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 61 [2020-10-11 18:49:23,594 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 18:49:23,738 INFO L129 PetriNetUnfolder]: 3/88 cut-off events. [2020-10-11 18:49:23,739 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-11 18:49:23,740 INFO L80 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 88 events. 3/88 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 216 event pairs, 0 based on Foata normal form. 20/102 useless extension candidates. Maximal degree in co-relation 84. Up to 6 conditions per place. [2020-10-11 18:49:23,741 INFO L132 encePairwiseOnDemand]: 49/61 looper letters, 13 selfloop transitions, 11 changer transitions 1/66 dead transitions. [2020-10-11 18:49:23,741 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 66 transitions, 190 flow [2020-10-11 18:49:23,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 18:49:23,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-11 18:49:23,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 498 transitions. [2020-10-11 18:49:23,759 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7421758569299552 [2020-10-11 18:49:23,760 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 498 transitions. [2020-10-11 18:49:23,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 498 transitions. [2020-10-11 18:49:23,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 18:49:23,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 498 transitions. [2020-10-11 18:49:23,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-11 18:49:23,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-11 18:49:23,779 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-11 18:49:23,781 INFO L185 Difference]: Start difference. First operand has 63 places, 60 transitions, 128 flow. Second operand 11 states and 498 transitions. [2020-10-11 18:49:23,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 66 transitions, 190 flow [2020-10-11 18:49:23,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 66 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-11 18:49:23,790 INFO L241 Difference]: Finished difference. Result has 76 places, 62 transitions, 173 flow [2020-10-11 18:49:23,794 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=173, PETRI_PLACES=76, PETRI_TRANSITIONS=62} [2020-10-11 18:49:23,795 INFO L341 CegarLoopForPetriNet]: 63 programPoint places, 13 predicate places. [2020-10-11 18:49:23,795 INFO L481 AbstractCegarLoop]: Abstraction has has 76 places, 62 transitions, 173 flow [2020-10-11 18:49:23,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 18:49:23,796 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 18:49:23,796 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 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] [2020-10-11 18:49:23,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-11 18:49:23,797 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 18:49:23,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 18:49:23,797 INFO L82 PathProgramCache]: Analyzing trace with hash 447630108, now seen corresponding path program 1 times [2020-10-11 18:49:23,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 18:49:23,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085492649] [2020-10-11 18:49:23,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 18:49:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 18:49:23,843 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 18:49:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 18:49:23,866 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 18:49:23,898 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-11 18:49:23,898 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-11 18:49:23,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-11 18:49:23,900 WARN L371 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-11 18:49:23,901 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2020-10-11 18:49:23,910 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,910 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,910 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,910 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,911 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,914 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,914 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,915 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,915 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,915 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,915 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,915 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,915 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,915 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,916 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,916 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,916 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,916 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,917 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,917 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,917 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,917 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,917 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,918 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,918 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,918 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,918 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,919 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,919 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,919 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,919 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,920 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,920 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,920 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,920 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,920 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,921 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,921 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,921 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,921 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,921 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,922 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,922 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,922 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,922 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,923 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,923 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,923 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,926 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,927 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,927 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,927 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,927 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,927 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,929 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,930 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,930 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,930 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,930 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,932 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,932 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,932 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,932 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,932 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:23,934 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-10-11 18:49:23,934 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 18:49:23,934 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 18:49:23,934 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 18:49:23,935 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 18:49:23,935 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 18:49:23,935 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 18:49:23,935 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 18:49:23,935 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 18:49:23,938 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 85 places, 79 transitions, 182 flow [2020-10-11 18:49:23,955 INFO L129 PetriNetUnfolder]: 5/93 cut-off events. [2020-10-11 18:49:23,956 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2020-10-11 18:49:23,957 INFO L80 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 93 events. 5/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 135 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 102. Up to 6 conditions per place. [2020-10-11 18:49:23,957 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 79 transitions, 182 flow [2020-10-11 18:49:23,959 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 67 transitions, 149 flow [2020-10-11 18:49:23,966 INFO L129 PetriNetUnfolder]: 3/44 cut-off events. [2020-10-11 18:49:23,966 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 18:49:23,967 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 18:49:23,967 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] [2020-10-11 18:49:23,967 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 18:49:23,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 18:49:23,968 INFO L82 PathProgramCache]: Analyzing trace with hash 224627827, now seen corresponding path program 1 times [2020-10-11 18:49:23,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 18:49:23,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195167819] [2020-10-11 18:49:23,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 18:49:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 18:49:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 18:49:24,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195167819] [2020-10-11 18:49:24,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 18:49:24,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-11 18:49:24,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249626345] [2020-10-11 18:49:24,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 18:49:24,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 18:49:24,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 18:49:24,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-11 18:49:24,802 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 79 [2020-10-11 18:49:24,802 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 67 transitions, 149 flow. Second operand 8 states. [2020-10-11 18:49:24,803 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 18:49:24,803 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 79 [2020-10-11 18:49:24,803 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 18:49:24,972 INFO L129 PetriNetUnfolder]: 24/173 cut-off events. [2020-10-11 18:49:24,972 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2020-10-11 18:49:24,978 INFO L80 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 173 events. 24/173 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 666 event pairs, 4 based on Foata normal form. 49/205 useless extension candidates. Maximal degree in co-relation 214. Up to 25 conditions per place. [2020-10-11 18:49:24,980 INFO L132 encePairwiseOnDemand]: 66/79 looper letters, 21 selfloop transitions, 14 changer transitions 1/83 dead transitions. [2020-10-11 18:49:24,980 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 83 transitions, 253 flow [2020-10-11 18:49:24,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 18:49:24,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-11 18:49:24,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 685 transitions. [2020-10-11 18:49:24,985 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7882623705408516 [2020-10-11 18:49:24,985 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 685 transitions. [2020-10-11 18:49:24,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 685 transitions. [2020-10-11 18:49:24,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 18:49:24,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 685 transitions. [2020-10-11 18:49:24,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-11 18:49:24,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-11 18:49:24,992 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-11 18:49:24,993 INFO L185 Difference]: Start difference. First operand has 72 places, 67 transitions, 149 flow. Second operand 11 states and 685 transitions. [2020-10-11 18:49:24,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 83 transitions, 253 flow [2020-10-11 18:49:24,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 83 transitions, 250 flow, removed 1 selfloop flow, removed 1 redundant places. [2020-10-11 18:49:25,001 INFO L241 Difference]: Finished difference. Result has 86 places, 73 transitions, 226 flow [2020-10-11 18:49:25,002 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=226, PETRI_PLACES=86, PETRI_TRANSITIONS=73} [2020-10-11 18:49:25,008 INFO L341 CegarLoopForPetriNet]: 72 programPoint places, 14 predicate places. [2020-10-11 18:49:25,008 INFO L481 AbstractCegarLoop]: Abstraction has has 86 places, 73 transitions, 226 flow [2020-10-11 18:49:25,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 18:49:25,009 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 18:49:25,009 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] [2020-10-11 18:49:25,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-11 18:49:25,009 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 18:49:25,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 18:49:25,010 INFO L82 PathProgramCache]: Analyzing trace with hash -215147791, now seen corresponding path program 1 times [2020-10-11 18:49:25,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 18:49:25,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931493412] [2020-10-11 18:49:25,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 18:49:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 18:49:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 18:49:25,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931493412] [2020-10-11 18:49:25,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 18:49:25,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-11 18:49:25,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492491144] [2020-10-11 18:49:25,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 18:49:25,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 18:49:25,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 18:49:25,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-11 18:49:25,885 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 79 [2020-10-11 18:49:25,886 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 73 transitions, 226 flow. Second operand 9 states. [2020-10-11 18:49:25,886 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 18:49:25,886 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 79 [2020-10-11 18:49:25,886 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 18:49:26,782 INFO L129 PetriNetUnfolder]: 697/2482 cut-off events. [2020-10-11 18:49:26,783 INFO L130 PetriNetUnfolder]: For 1156/1200 co-relation queries the response was YES. [2020-10-11 18:49:26,796 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4855 conditions, 2482 events. 697/2482 cut-off events. For 1156/1200 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 23048 event pairs, 27 based on Foata normal form. 39/2502 useless extension candidates. Maximal degree in co-relation 4809. Up to 233 conditions per place. [2020-10-11 18:49:26,817 INFO L132 encePairwiseOnDemand]: 66/79 looper letters, 112 selfloop transitions, 81 changer transitions 0/236 dead transitions. [2020-10-11 18:49:26,817 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 236 transitions, 1206 flow [2020-10-11 18:49:26,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 18:49:26,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-11 18:49:26,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2047 transitions. [2020-10-11 18:49:26,826 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7620997766195086 [2020-10-11 18:49:26,826 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2047 transitions. [2020-10-11 18:49:26,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2047 transitions. [2020-10-11 18:49:26,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 18:49:26,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2047 transitions. [2020-10-11 18:49:26,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 35 states. [2020-10-11 18:49:26,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 35 states. [2020-10-11 18:49:26,842 INFO L81 ComplementDD]: Finished complementDD. Result 35 states. [2020-10-11 18:49:26,842 INFO L185 Difference]: Start difference. First operand has 86 places, 73 transitions, 226 flow. Second operand 34 states and 2047 transitions. [2020-10-11 18:49:26,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 236 transitions, 1206 flow [2020-10-11 18:49:26,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 236 transitions, 1200 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-11 18:49:26,860 INFO L241 Difference]: Finished difference. Result has 135 places, 154 transitions, 928 flow [2020-10-11 18:49:26,860 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=928, PETRI_PLACES=135, PETRI_TRANSITIONS=154} [2020-10-11 18:49:26,862 INFO L341 CegarLoopForPetriNet]: 72 programPoint places, 63 predicate places. [2020-10-11 18:49:26,862 INFO L481 AbstractCegarLoop]: Abstraction has has 135 places, 154 transitions, 928 flow [2020-10-11 18:49:26,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 18:49:26,862 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 18:49:26,863 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 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] [2020-10-11 18:49:26,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-11 18:49:26,863 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 18:49:26,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 18:49:26,864 INFO L82 PathProgramCache]: Analyzing trace with hash 758782953, now seen corresponding path program 1 times [2020-10-11 18:49:26,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 18:49:26,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369027117] [2020-10-11 18:49:26,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 18:49:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 18:49:26,883 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 18:49:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 18:49:26,897 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 18:49:26,908 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-11 18:49:26,908 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-11 18:49:26,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-11 18:49:26,909 WARN L371 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-11 18:49:26,910 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2020-10-11 18:49:26,921 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,921 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,921 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,922 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,922 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,922 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,922 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,922 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,923 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,923 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,923 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,923 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,923 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,924 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,924 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,924 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,924 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,924 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,925 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,925 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,925 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,925 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,925 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,925 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,926 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,926 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,926 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,927 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,927 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,927 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,927 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,927 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,928 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,928 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,928 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,928 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,928 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,929 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,929 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,929 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,930 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,930 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,930 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,930 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,930 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,931 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,931 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,931 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,931 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,932 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,932 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,932 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,932 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,933 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,933 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,933 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,933 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,933 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,934 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,934 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,934 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,934 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,934 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,935 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,935 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,935 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,936 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,936 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,936 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,938 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,938 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,938 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,939 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,939 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,939 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,940 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,941 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,941 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,941 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,941 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,942 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,943 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,943 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,943 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,943 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,944 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,945 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,945 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,945 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,946 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,946 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,947 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,947 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,947 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,948 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,948 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:49:26,949 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-10-11 18:49:26,949 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 18:49:26,950 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 18:49:26,950 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 18:49:26,950 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 18:49:26,950 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 18:49:26,950 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 18:49:26,950 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 18:49:26,950 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 18:49:26,953 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 106 places, 97 transitions, 236 flow [2020-10-11 18:49:26,966 INFO L129 PetriNetUnfolder]: 6/115 cut-off events. [2020-10-11 18:49:26,966 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-10-11 18:49:26,967 INFO L80 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 115 events. 6/115 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 174 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 129. Up to 8 conditions per place. [2020-10-11 18:49:26,967 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 97 transitions, 236 flow [2020-10-11 18:49:26,968 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 74 transitions, 172 flow [2020-10-11 18:49:26,973 INFO L129 PetriNetUnfolder]: 3/43 cut-off events. [2020-10-11 18:49:26,973 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 18:49:26,973 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 18:49:26,974 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] [2020-10-11 18:49:26,974 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 18:49:26,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 18:49:26,974 INFO L82 PathProgramCache]: Analyzing trace with hash -2111596188, now seen corresponding path program 1 times [2020-10-11 18:49:26,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 18:49:26,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552601989] [2020-10-11 18:49:26,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 18:49:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 18:49:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 18:49:27,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552601989] [2020-10-11 18:49:27,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 18:49:27,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-11 18:49:27,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697436216] [2020-10-11 18:49:27,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 18:49:27,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 18:49:27,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 18:49:27,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-11 18:49:27,540 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 97 [2020-10-11 18:49:27,541 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 74 transitions, 172 flow. Second operand 8 states. [2020-10-11 18:49:27,541 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 18:49:27,541 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 97 [2020-10-11 18:49:27,542 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 18:49:27,704 INFO L129 PetriNetUnfolder]: 91/357 cut-off events. [2020-10-11 18:49:27,705 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2020-10-11 18:49:27,707 INFO L80 FinitePrefix]: Finished finitePrefix Result has 552 conditions, 357 events. 91/357 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1824 event pairs, 26 based on Foata normal form. 100/414 useless extension candidates. Maximal degree in co-relation 510. Up to 77 conditions per place. [2020-10-11 18:49:27,710 INFO L132 encePairwiseOnDemand]: 83/97 looper letters, 25 selfloop transitions, 17 changer transitions 1/96 dead transitions. [2020-10-11 18:49:27,710 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 96 transitions, 302 flow [2020-10-11 18:49:27,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 18:49:27,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-11 18:49:27,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 868 transitions. [2020-10-11 18:49:27,713 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8134957825679475 [2020-10-11 18:49:27,713 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 868 transitions. [2020-10-11 18:49:27,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 868 transitions. [2020-10-11 18:49:27,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 18:49:27,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 868 transitions. [2020-10-11 18:49:27,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-11 18:49:27,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-11 18:49:27,718 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-11 18:49:27,719 INFO L185 Difference]: Start difference. First operand has 81 places, 74 transitions, 172 flow. Second operand 11 states and 868 transitions. [2020-10-11 18:49:27,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 96 transitions, 302 flow [2020-10-11 18:49:27,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 96 transitions, 295 flow, removed 3 selfloop flow, removed 1 redundant places. [2020-10-11 18:49:27,722 INFO L241 Difference]: Finished difference. Result has 95 places, 83 transitions, 268 flow [2020-10-11 18:49:27,723 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=268, PETRI_PLACES=95, PETRI_TRANSITIONS=83} [2020-10-11 18:49:27,723 INFO L341 CegarLoopForPetriNet]: 81 programPoint places, 14 predicate places. [2020-10-11 18:49:27,723 INFO L481 AbstractCegarLoop]: Abstraction has has 95 places, 83 transitions, 268 flow [2020-10-11 18:49:27,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 18:49:27,723 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 18:49:27,723 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] [2020-10-11 18:49:27,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-11 18:49:27,724 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 18:49:27,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 18:49:27,724 INFO L82 PathProgramCache]: Analyzing trace with hash 746694354, now seen corresponding path program 1 times [2020-10-11 18:49:27,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 18:49:27,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899027605] [2020-10-11 18:49:27,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 18:49:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 18:49:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 18:49:27,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899027605] [2020-10-11 18:49:27,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 18:49:27,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-11 18:49:27,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921578258] [2020-10-11 18:49:27,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 18:49:27,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 18:49:27,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 18:49:27,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-11 18:49:28,646 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2020-10-11 18:49:28,647 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 83 transitions, 268 flow. Second operand 9 states. [2020-10-11 18:49:28,647 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 18:49:28,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2020-10-11 18:49:28,648 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 18:49:29,975 INFO L129 PetriNetUnfolder]: 2549/7426 cut-off events. [2020-10-11 18:49:29,975 INFO L130 PetriNetUnfolder]: For 5435/5653 co-relation queries the response was YES. [2020-10-11 18:49:30,011 INFO L80 FinitePrefix]: Finished finitePrefix Result has 16514 conditions, 7426 events. 2549/7426 cut-off events. For 5435/5653 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 76697 event pairs, 238 based on Foata normal form. 99/7442 useless extension candidates. Maximal degree in co-relation 16467. Up to 1250 conditions per place. [2020-10-11 18:49:30,063 INFO L132 encePairwiseOnDemand]: 83/97 looper letters, 128 selfloop transitions, 97 changer transitions 0/274 dead transitions. [2020-10-11 18:49:30,063 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 274 transitions, 1515 flow [2020-10-11 18:49:30,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 18:49:30,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-11 18:49:30,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2619 transitions. [2020-10-11 18:49:30,072 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7941176470588235 [2020-10-11 18:49:30,072 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2619 transitions. [2020-10-11 18:49:30,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2619 transitions. [2020-10-11 18:49:30,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 18:49:30,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2619 transitions. [2020-10-11 18:49:30,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 35 states. [2020-10-11 18:49:30,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 35 states. [2020-10-11 18:49:30,086 INFO L81 ComplementDD]: Finished complementDD. Result 35 states. [2020-10-11 18:49:30,086 INFO L185 Difference]: Start difference. First operand has 95 places, 83 transitions, 268 flow. Second operand 34 states and 2619 transitions. [2020-10-11 18:49:30,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 274 transitions, 1515 flow [2020-10-11 18:49:30,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 274 transitions, 1509 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-11 18:49:30,108 INFO L241 Difference]: Finished difference. Result has 145 places, 178 transitions, 1132 flow [2020-10-11 18:49:30,109 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1132, PETRI_PLACES=145, PETRI_TRANSITIONS=178} [2020-10-11 18:49:30,109 INFO L341 CegarLoopForPetriNet]: 81 programPoint places, 64 predicate places. [2020-10-11 18:49:30,109 INFO L481 AbstractCegarLoop]: Abstraction has has 145 places, 178 transitions, 1132 flow [2020-10-11 18:49:30,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 18:49:30,109 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 18:49:30,109 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 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] [2020-10-11 18:49:30,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-11 18:49:30,110 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 18:49:30,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 18:49:30,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1454042732, now seen corresponding path program 1 times [2020-10-11 18:49:30,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 18:49:30,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069965837] [2020-10-11 18:49:30,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 18:49:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 18:49:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 18:49:30,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069965837] [2020-10-11 18:49:30,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169159370] [2020-10-11 18:49:30,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 18:49:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 18:49:30,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 18:49:30,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 18:49:30,412 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 18:49:30,416 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 18:49:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 18:49:30,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 18:49:30,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2020-10-11 18:49:30,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625084675] [2020-10-11 18:49:30,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 18:49:30,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 18:49:30,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 18:49:30,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-10-11 18:49:32,673 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 97 [2020-10-11 18:49:32,674 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 178 transitions, 1132 flow. Second operand 18 states. [2020-10-11 18:49:32,674 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 18:49:32,674 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 97 [2020-10-11 18:49:32,675 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 18:49:40,148 INFO L129 PetriNetUnfolder]: 10431/25439 cut-off events. [2020-10-11 18:49:40,149 INFO L130 PetriNetUnfolder]: For 118909/121818 co-relation queries the response was YES. [2020-10-11 18:49:40,323 INFO L80 FinitePrefix]: Finished finitePrefix Result has 89159 conditions, 25439 events. 10431/25439 cut-off events. For 118909/121818 co-relation queries the response was YES. Maximal size of possible extension queue 1875. Compared 296834 event pairs, 2391 based on Foata normal form. 326/25396 useless extension candidates. Maximal degree in co-relation 89090. Up to 4403 conditions per place. [2020-10-11 18:49:40,483 INFO L132 encePairwiseOnDemand]: 81/97 looper letters, 250 selfloop transitions, 279 changer transitions 6/592 dead transitions. [2020-10-11 18:49:40,483 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 592 transitions, 5422 flow [2020-10-11 18:49:40,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-11 18:49:40,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 18:49:40,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3743 transitions. [2020-10-11 18:49:40,493 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7717525773195876 [2020-10-11 18:49:40,493 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3743 transitions. [2020-10-11 18:49:40,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3743 transitions. [2020-10-11 18:49:40,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 18:49:40,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3743 transitions. [2020-10-11 18:49:40,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 51 states. [2020-10-11 18:49:40,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 51 states. [2020-10-11 18:49:40,520 INFO L81 ComplementDD]: Finished complementDD. Result 51 states. [2020-10-11 18:49:40,521 INFO L185 Difference]: Start difference. First operand has 145 places, 178 transitions, 1132 flow. Second operand 50 states and 3743 transitions. [2020-10-11 18:49:40,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 592 transitions, 5422 flow [2020-10-11 18:49:41,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 592 transitions, 5168 flow, removed 126 selfloop flow, removed 1 redundant places. [2020-10-11 18:49:41,310 INFO L241 Difference]: Finished difference. Result has 229 places, 389 transitions, 3803 flow [2020-10-11 18:49:41,311 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=3803, PETRI_PLACES=229, PETRI_TRANSITIONS=389} [2020-10-11 18:49:41,311 INFO L341 CegarLoopForPetriNet]: 81 programPoint places, 148 predicate places. [2020-10-11 18:49:41,311 INFO L481 AbstractCegarLoop]: Abstraction has has 229 places, 389 transitions, 3803 flow [2020-10-11 18:49:41,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 18:49:41,311 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 18:49:41,312 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 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] [2020-10-11 18:49:41,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-10-11 18:49:41,513 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 18:49:41,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 18:49:41,514 INFO L82 PathProgramCache]: Analyzing trace with hash -815775658, now seen corresponding path program 1 times [2020-10-11 18:49:41,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 18:49:41,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888404009] [2020-10-11 18:49:41,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 18:49:41,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 18:49:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 18:49:41,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888404009] [2020-10-11 18:49:41,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600261208] [2020-10-11 18:49:41,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 18:49:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 18:49:41,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 18:49:41,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 18:49:42,110 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 18:49:42,116 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 18:49:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 18:49:42,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 18:49:42,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-10-11 18:49:42,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052460703] [2020-10-11 18:49:42,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 18:49:42,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 18:49:42,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 18:49:42,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-11 18:49:45,875 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 97 [2020-10-11 18:49:45,877 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 389 transitions, 3803 flow. Second operand 24 states. [2020-10-11 18:49:45,877 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 18:49:45,877 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 97 [2020-10-11 18:49:45,877 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 18:50:01,915 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 16 [2020-10-11 18:50:25,309 INFO L129 PetriNetUnfolder]: 39423/93368 cut-off events. [2020-10-11 18:50:25,309 INFO L130 PetriNetUnfolder]: For 1191046/1208612 co-relation queries the response was YES. [2020-10-11 18:50:26,579 INFO L80 FinitePrefix]: Finished finitePrefix Result has 458819 conditions, 93368 events. 39423/93368 cut-off events. For 1191046/1208612 co-relation queries the response was YES. Maximal size of possible extension queue 7018. Compared 1274806 event pairs, 3851 based on Foata normal form. 3890/96717 useless extension candidates. Maximal degree in co-relation 458711. Up to 12508 conditions per place. [2020-10-11 18:50:27,101 INFO L132 encePairwiseOnDemand]: 80/97 looper letters, 1448 selfloop transitions, 1848 changer transitions 106/3445 dead transitions. [2020-10-11 18:50:27,101 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 3445 transitions, 44724 flow [2020-10-11 18:50:27,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 310 states. [2020-10-11 18:50:27,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-11 18:50:27,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 22461 transitions. [2020-10-11 18:50:27,131 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7469571000997672 [2020-10-11 18:50:27,131 INFO L72 ComplementDD]: Start complementDD. Operand 310 states and 22461 transitions. [2020-10-11 18:50:27,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 310 states and 22461 transitions. [2020-10-11 18:50:27,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 18:50:27,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 310 states and 22461 transitions. [2020-10-11 18:50:27,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 311 states. [2020-10-11 18:50:27,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 311 states. [2020-10-11 18:50:27,194 INFO L81 ComplementDD]: Finished complementDD. Result 311 states. [2020-10-11 18:50:27,194 INFO L185 Difference]: Start difference. First operand has 229 places, 389 transitions, 3803 flow. Second operand 310 states and 22461 transitions. [2020-10-11 18:50:27,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 3445 transitions, 44724 flow [2020-10-11 18:50:58,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 3445 transitions, 43383 flow, removed 663 selfloop flow, removed 5 redundant places. [2020-10-11 18:50:58,413 INFO L241 Difference]: Finished difference. Result has 655 places, 2220 transitions, 32742 flow [2020-10-11 18:50:58,413 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3642, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=310, PETRI_FLOW=32742, PETRI_PLACES=655, PETRI_TRANSITIONS=2220} [2020-10-11 18:50:58,414 INFO L341 CegarLoopForPetriNet]: 81 programPoint places, 574 predicate places. [2020-10-11 18:50:58,414 INFO L481 AbstractCegarLoop]: Abstraction has has 655 places, 2220 transitions, 32742 flow [2020-10-11 18:50:58,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 18:50:58,414 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 18:50:58,414 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 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] [2020-10-11 18:50:58,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 18:50:58,615 INFO L429 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 18:50:58,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 18:50:58,616 INFO L82 PathProgramCache]: Analyzing trace with hash 760420792, now seen corresponding path program 2 times [2020-10-11 18:50:58,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 18:50:58,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583275852] [2020-10-11 18:50:58,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 18:50:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 18:50:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 18:50:58,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583275852] [2020-10-11 18:50:58,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418236793] [2020-10-11 18:50:58,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 18:50:58,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 18:50:58,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 18:50:58,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 18:50:58,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 18:50:59,014 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 18:50:59,019 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 18:50:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 18:50:59,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 18:50:59,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-10-11 18:50:59,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361977249] [2020-10-11 18:50:59,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 18:50:59,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 18:50:59,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 18:50:59,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2020-10-11 18:51:02,779 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 97 [2020-10-11 18:51:02,780 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 655 places, 2220 transitions, 32742 flow. Second operand 24 states. [2020-10-11 18:51:02,781 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 18:51:02,781 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 97 [2020-10-11 18:51:02,781 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 18:52:54,353 INFO L129 PetriNetUnfolder]: 49299/119125 cut-off events. [2020-10-11 18:52:54,354 INFO L130 PetriNetUnfolder]: For 7727298/7755847 co-relation queries the response was YES. [2020-10-11 18:52:58,767 INFO L80 FinitePrefix]: Finished finitePrefix Result has 930541 conditions, 119125 events. 49299/119125 cut-off events. For 7727298/7755847 co-relation queries the response was YES. Maximal size of possible extension queue 8899. Compared 1694730 event pairs, 4926 based on Foata normal form. 4329/122844 useless extension candidates. Maximal degree in co-relation 930310. Up to 17823 conditions per place. [2020-10-11 18:52:59,561 INFO L132 encePairwiseOnDemand]: 79/97 looper letters, 2004 selfloop transitions, 1871 changer transitions 488/4406 dead transitions. [2020-10-11 18:52:59,561 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 816 places, 4406 transitions, 83739 flow [2020-10-11 18:52:59,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2020-10-11 18:52:59,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-11 18:52:59,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 11696 transitions. [2020-10-11 18:52:59,575 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7443044418989436 [2020-10-11 18:52:59,576 INFO L72 ComplementDD]: Start complementDD. Operand 162 states and 11696 transitions. [2020-10-11 18:52:59,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 162 states and 11696 transitions. [2020-10-11 18:52:59,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 18:52:59,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 162 states and 11696 transitions. [2020-10-11 18:52:59,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 163 states. [2020-10-11 18:52:59,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 163 states. [2020-10-11 18:52:59,612 INFO L81 ComplementDD]: Finished complementDD. Result 163 states. [2020-10-11 18:52:59,612 INFO L185 Difference]: Start difference. First operand has 655 places, 2220 transitions, 32742 flow. Second operand 162 states and 11696 transitions. [2020-10-11 18:52:59,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 816 places, 4406 transitions, 83739 flow [2020-10-11 18:58:32,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 763 places, 4406 transitions, 62598 flow, removed 9438 selfloop flow, removed 53 redundant places. [2020-10-11 18:58:32,272 INFO L241 Difference]: Finished difference. Result has 858 places, 2912 transitions, 38729 flow [2020-10-11 18:58:32,275 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=23717, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=884, PETRI_DIFFERENCE_SUBTRAHEND_STATES=162, PETRI_FLOW=38729, PETRI_PLACES=858, PETRI_TRANSITIONS=2912} [2020-10-11 18:58:32,275 INFO L341 CegarLoopForPetriNet]: 81 programPoint places, 777 predicate places. [2020-10-11 18:58:32,276 INFO L481 AbstractCegarLoop]: Abstraction has has 858 places, 2912 transitions, 38729 flow [2020-10-11 18:58:32,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 18:58:32,276 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 18:58:32,276 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 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] [2020-10-11 18:58:32,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-11 18:58:32,490 INFO L429 AbstractCegarLoop]: === Iteration 6 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 18:58:32,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 18:58:32,490 INFO L82 PathProgramCache]: Analyzing trace with hash 90091542, now seen corresponding path program 3 times [2020-10-11 18:58:32,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 18:58:32,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845115942] [2020-10-11 18:58:32,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 18:58:32,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 18:58:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 18:58:32,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845115942] [2020-10-11 18:58:32,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087950058] [2020-10-11 18:58:32,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 18:58:32,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 18:58:32,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 18:58:32,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 18:58:32,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 18:58:32,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 18:58:32,863 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 18:58:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 18:58:32,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 18:58:32,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-10-11 18:58:32,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503469084] [2020-10-11 18:58:32,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 18:58:32,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 18:58:32,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 18:58:32,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2020-10-11 18:58:36,884 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 97 [2020-10-11 18:58:36,885 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 858 places, 2912 transitions, 38729 flow. Second operand 24 states. [2020-10-11 18:58:36,885 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 18:58:36,885 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 97 [2020-10-11 18:58:36,885 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request...