/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-wmm/thin002_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 20:31:47,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 20:31:47,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 20:31:47,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 20:31:47,545 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 20:31:47,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 20:31:47,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 20:31:47,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 20:31:47,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 20:31:47,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 20:31:47,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 20:31:47,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 20:31:47,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 20:31:47,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 20:31:47,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 20:31:47,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 20:31:47,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 20:31:47,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 20:31:47,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 20:31:47,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 20:31:47,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 20:31:47,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 20:31:47,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 20:31:47,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 20:31:47,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 20:31:47,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 20:31:47,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 20:31:47,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 20:31:47,600 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2021-03-11 20:31:47,637 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 20:31:47,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 20:31:47,641 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 20:31:47,641 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 20:31:47,641 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 20:31:47,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 20:31:47,642 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 20:31:47,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 20:31:47,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 20:31:47,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 20:31:47,643 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 20:31:47,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 20:31:47,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 20:31:47,643 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 20:31:47,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 20:31:47,644 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 20:31:47,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 20:31:47,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 20:31:47,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 20:31:47,644 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 20:31:47,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 20:31:47,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 20:31:47,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 20:31:47,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 20:31:47,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 20:31:47,645 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 20:31:47,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 20:31:47,646 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 20:31:47,646 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 20:31:47,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 20:31:47,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 20:31:47,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 20:31:47,989 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-11 20:31:48,006 INFO L275 PluginConnector]: CDTParser initialized [2021-03-11 20:31:48,007 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/thin002_tso.opt.i [2021-03-11 20:31:48,058 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e251543d2/f824125f4df7433ea58f984552791a31/FLAG75ec8c34a [2021-03-11 20:31:48,579 INFO L306 CDTParser]: Found 1 translation units. [2021-03-11 20:31:48,579 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin002_tso.opt.i [2021-03-11 20:31:48,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e251543d2/f824125f4df7433ea58f984552791a31/FLAG75ec8c34a [2021-03-11 20:31:48,877 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e251543d2/f824125f4df7433ea58f984552791a31 [2021-03-11 20:31:48,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 20:31:48,886 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-11 20:31:48,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-11 20:31:48,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-11 20:31:48,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-11 20:31:48,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 08:31:48" (1/1) ... [2021-03-11 20:31:48,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5790c210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:31:48, skipping insertion in model container [2021-03-11 20:31:48,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 08:31:48" (1/1) ... [2021-03-11 20:31:48,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-11 20:31:48,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-11 20:31:49,082 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin002_tso.opt.i[949,962] [2021-03-11 20:31:49,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 20:31:49,294 INFO L203 MainTranslator]: Completed pre-run [2021-03-11 20:31:49,305 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin002_tso.opt.i[949,962] [2021-03-11 20:31:49,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 20:31:49,423 INFO L208 MainTranslator]: Completed translation [2021-03-11 20:31:49,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:31:49 WrapperNode [2021-03-11 20:31:49,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-11 20:31:49,424 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 20:31:49,424 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 20:31:49,425 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 20:31:49,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:31:49" (1/1) ... [2021-03-11 20:31:49,446 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:31:49" (1/1) ... [2021-03-11 20:31:49,462 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 20:31:49,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 20:31:49,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 20:31:49,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 20:31:49,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:31:49" (1/1) ... [2021-03-11 20:31:49,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:31:49" (1/1) ... [2021-03-11 20:31:49,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:31:49" (1/1) ... [2021-03-11 20:31:49,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:31:49" (1/1) ... [2021-03-11 20:31:49,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:31:49" (1/1) ... [2021-03-11 20:31:49,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:31:49" (1/1) ... [2021-03-11 20:31:49,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:31:49" (1/1) ... [2021-03-11 20:31:49,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 20:31:49,483 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 20:31:49,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 20:31:49,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 20:31:49,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:31:49" (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 [2021-03-11 20:31:49,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-11 20:31:49,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-11 20:31:49,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-11 20:31:49,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-11 20:31:49,544 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-03-11 20:31:49,544 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-03-11 20:31:49,544 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-03-11 20:31:49,544 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-03-11 20:31:49,544 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-03-11 20:31:49,544 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-03-11 20:31:49,544 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2021-03-11 20:31:49,544 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2021-03-11 20:31:49,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-11 20:31:49,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-11 20:31:49,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 20:31:49,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 20:31:49,546 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 20:31:49,897 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 20:31:49,897 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-03-11 20:31:49,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 08:31:49 BoogieIcfgContainer [2021-03-11 20:31:49,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 20:31:49,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 20:31:49,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 20:31:49,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 20:31:49,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.03 08:31:48" (1/3) ... [2021-03-11 20:31:49,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@372d276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 08:31:49, skipping insertion in model container [2021-03-11 20:31:49,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:31:49" (2/3) ... [2021-03-11 20:31:49,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@372d276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 08:31:49, skipping insertion in model container [2021-03-11 20:31:49,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 08:31:49" (3/3) ... [2021-03-11 20:31:49,905 INFO L111 eAbstractionObserver]: Analyzing ICFG thin002_tso.opt.i [2021-03-11 20:31:49,910 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 20:31:49,913 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 20:31:49,914 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 20:31:49,938 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,939 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,939 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,939 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,939 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,939 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,939 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,939 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,940 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,940 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,940 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,940 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,941 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,941 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,941 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,941 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,942 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,942 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,942 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,942 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,942 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,943 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,943 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,943 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,943 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,943 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,944 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,944 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,944 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,944 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,944 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,944 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,945 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,945 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,945 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,945 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,945 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,945 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,946 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,946 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,946 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,946 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,946 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,946 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,947 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,947 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,947 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,947 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,949 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,949 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,949 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,949 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,953 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,953 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,953 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,953 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,955 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,955 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,955 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,955 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,957 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,957 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,957 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,957 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:31:49,958 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 20:31:49,974 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-11 20:31:49,992 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 20:31:49,992 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 20:31:49,992 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 20:31:49,992 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 20:31:49,992 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 20:31:49,992 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 20:31:49,993 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 20:31:49,993 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 20:31:50,002 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 102 places, 91 transitions, 202 flow [2021-03-11 20:31:50,059 INFO L129 PetriNetUnfolder]: 2/87 cut-off events. [2021-03-11 20:31:50,059 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:31:50,062 INFO L84 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 87 events. 2/87 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2021-03-11 20:31:50,062 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 91 transitions, 202 flow [2021-03-11 20:31:50,066 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 73 transitions, 158 flow [2021-03-11 20:31:50,069 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 20:31:50,077 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 73 transitions, 158 flow [2021-03-11 20:31:50,079 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 73 transitions, 158 flow [2021-03-11 20:31:50,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 73 transitions, 158 flow [2021-03-11 20:31:50,095 INFO L129 PetriNetUnfolder]: 1/73 cut-off events. [2021-03-11 20:31:50,095 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:31:50,096 INFO L84 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 73 events. 1/73 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 65 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 56. Up to 2 conditions per place. [2021-03-11 20:31:50,097 INFO L116 LiptonReduction]: Number of co-enabled transitions 1392 [2021-03-11 20:31:52,438 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-03-11 20:31:52,677 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-03-11 20:31:52,775 INFO L131 LiptonReduction]: Checked pairs total: 2962 [2021-03-11 20:31:52,775 INFO L133 LiptonReduction]: Total number of compositions: 55 [2021-03-11 20:31:52,776 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2710 [2021-03-11 20:31:52,784 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-11 20:31:52,785 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:31:52,785 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:31:52,785 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:31:52,786 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:31:52,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:31:52,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1228416870, now seen corresponding path program 1 times [2021-03-11 20:31:52,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:31:52,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369312942] [2021-03-11 20:31:52,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:31:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:31:52,921 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:31:52,922 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:31:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:31:52,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369312942] [2021-03-11 20:31:52,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:31:52,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:31:52,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786007897] [2021-03-11 20:31:52,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-03-11 20:31:52,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:31:52,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-03-11 20:31:52,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-03-11 20:31:52,943 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 146 [2021-03-11 20:31:52,948 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 23 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 139.5) internal successors, (279), 2 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:52,948 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:31:52,948 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 146 [2021-03-11 20:31:52,949 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:31:52,960 INFO L129 PetriNetUnfolder]: 0/22 cut-off events. [2021-03-11 20:31:52,960 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:31:52,961 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 22 events. 0/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 28 event pairs, 0 based on Foata normal form. 1/23 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-03-11 20:31:52,961 INFO L132 encePairwiseOnDemand]: 145/146 looper letters, 0 selfloop transitions, 0 changer transitions 0/22 dead transitions. [2021-03-11 20:31:52,962 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 22 transitions, 56 flow [2021-03-11 20:31:52,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-03-11 20:31:52,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-03-11 20:31:52,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 279 transitions. [2021-03-11 20:31:52,977 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9554794520547946 [2021-03-11 20:31:52,977 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 279 transitions. [2021-03-11 20:31:52,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 279 transitions. [2021-03-11 20:31:52,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:31:52,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 279 transitions. [2021-03-11 20:31:52,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 139.5) internal successors, (279), 2 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:52,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:52,992 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:52,994 INFO L185 Difference]: Start difference. First operand has 35 places, 23 transitions, 58 flow. Second operand 2 states and 279 transitions. [2021-03-11 20:31:52,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 22 transitions, 56 flow [2021-03-11 20:31:52,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 22 transitions, 52 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-03-11 20:31:52,997 INFO L241 Difference]: Finished difference. Result has 32 places, 22 transitions, 52 flow [2021-03-11 20:31:52,999 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=52, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2021-03-11 20:31:52,999 INFO L335 CegarLoopForPetriNet]: 35 programPoint places, -3 predicate places. [2021-03-11 20:31:53,000 INFO L480 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 52 flow [2021-03-11 20:31:53,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 139.5) internal successors, (279), 2 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,000 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:31:53,000 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:31:53,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 20:31:53,001 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:31:53,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:31:53,001 INFO L82 PathProgramCache]: Analyzing trace with hash -573783043, now seen corresponding path program 1 times [2021-03-11 20:31:53,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:31:53,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23620861] [2021-03-11 20:31:53,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:31:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:31:53,169 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-03-11 20:31:53,170 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 20:31:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:31:53,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23620861] [2021-03-11 20:31:53,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:31:53,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:31:53,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557822739] [2021-03-11 20:31:53,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 20:31:53,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:31:53,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 20:31:53,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 20:31:53,193 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 146 [2021-03-11 20:31:53,193 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,193 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:31:53,194 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 146 [2021-03-11 20:31:53,194 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:31:53,221 INFO L129 PetriNetUnfolder]: 45/130 cut-off events. [2021-03-11 20:31:53,221 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:31:53,222 INFO L84 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 130 events. 45/130 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 562 event pairs, 23 based on Foata normal form. 1/117 useless extension candidates. Maximal degree in co-relation 214. Up to 76 conditions per place. [2021-03-11 20:31:53,223 INFO L132 encePairwiseOnDemand]: 140/146 looper letters, 5 selfloop transitions, 5 changer transitions 0/26 dead transitions. [2021-03-11 20:31:53,223 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 26 transitions, 80 flow [2021-03-11 20:31:53,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:31:53,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:31:53,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2021-03-11 20:31:53,225 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.819634703196347 [2021-03-11 20:31:53,225 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2021-03-11 20:31:53,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2021-03-11 20:31:53,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:31:53,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2021-03-11 20:31:53,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,228 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,228 INFO L185 Difference]: Start difference. First operand has 32 places, 22 transitions, 52 flow. Second operand 3 states and 359 transitions. [2021-03-11 20:31:53,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 26 transitions, 80 flow [2021-03-11 20:31:53,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 26 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-11 20:31:53,230 INFO L241 Difference]: Finished difference. Result has 35 places, 26 transitions, 85 flow [2021-03-11 20:31:53,230 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2021-03-11 20:31:53,230 INFO L335 CegarLoopForPetriNet]: 35 programPoint places, 0 predicate places. [2021-03-11 20:31:53,230 INFO L480 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 85 flow [2021-03-11 20:31:53,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,231 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:31:53,231 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:31:53,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 20:31:53,231 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:31:53,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:31:53,232 INFO L82 PathProgramCache]: Analyzing trace with hash -607406242, now seen corresponding path program 1 times [2021-03-11 20:31:53,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:31:53,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260359231] [2021-03-11 20:31:53,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:31:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:31:53,264 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:31:53,264 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:31:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:31:53,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260359231] [2021-03-11 20:31:53,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:31:53,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:31:53,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891597520] [2021-03-11 20:31:53,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 20:31:53,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:31:53,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 20:31:53,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 20:31:53,269 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 146 [2021-03-11 20:31:53,270 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,270 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:31:53,270 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 146 [2021-03-11 20:31:53,270 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:31:53,284 INFO L129 PetriNetUnfolder]: 29/93 cut-off events. [2021-03-11 20:31:53,284 INFO L130 PetriNetUnfolder]: For 19/43 co-relation queries the response was YES. [2021-03-11 20:31:53,285 INFO L84 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 93 events. 29/93 cut-off events. For 19/43 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 349 event pairs, 11 based on Foata normal form. 4/87 useless extension candidates. Maximal degree in co-relation 175. Up to 53 conditions per place. [2021-03-11 20:31:53,286 INFO L132 encePairwiseOnDemand]: 143/146 looper letters, 1 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2021-03-11 20:31:53,286 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 26 transitions, 93 flow [2021-03-11 20:31:53,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:31:53,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:31:53,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2021-03-11 20:31:53,287 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8789954337899544 [2021-03-11 20:31:53,288 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2021-03-11 20:31:53,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2021-03-11 20:31:53,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:31:53,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2021-03-11 20:31:53,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,291 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,291 INFO L185 Difference]: Start difference. First operand has 35 places, 26 transitions, 85 flow. Second operand 3 states and 385 transitions. [2021-03-11 20:31:53,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 26 transitions, 93 flow [2021-03-11 20:31:53,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 26 transitions, 88 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 20:31:53,292 INFO L241 Difference]: Finished difference. Result has 37 places, 26 transitions, 91 flow [2021-03-11 20:31:53,292 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2021-03-11 20:31:53,293 INFO L335 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2021-03-11 20:31:53,293 INFO L480 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 91 flow [2021-03-11 20:31:53,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,293 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:31:53,293 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:31:53,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 20:31:53,294 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:31:53,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:31:53,294 INFO L82 PathProgramCache]: Analyzing trace with hash -619176818, now seen corresponding path program 1 times [2021-03-11 20:31:53,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:31:53,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754997228] [2021-03-11 20:31:53,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:31:53,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:31:53,324 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:31:53,324 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:31:53,327 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-03-11 20:31:53,328 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 20:31:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:31:53,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754997228] [2021-03-11 20:31:53,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:31:53,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:31:53,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267367773] [2021-03-11 20:31:53,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:31:53,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:31:53,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:31:53,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:31:53,338 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 146 [2021-03-11 20:31:53,339 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 116.75) internal successors, (467), 4 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,339 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:31:53,339 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 146 [2021-03-11 20:31:53,339 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:31:53,361 INFO L129 PetriNetUnfolder]: 21/79 cut-off events. [2021-03-11 20:31:53,361 INFO L130 PetriNetUnfolder]: For 40/156 co-relation queries the response was YES. [2021-03-11 20:31:53,362 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 79 events. 21/79 cut-off events. For 40/156 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 282 event pairs, 5 based on Foata normal form. 5/78 useless extension candidates. Maximal degree in co-relation 190. Up to 41 conditions per place. [2021-03-11 20:31:53,362 INFO L132 encePairwiseOnDemand]: 143/146 looper letters, 10 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2021-03-11 20:31:53,362 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 29 transitions, 132 flow [2021-03-11 20:31:53,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:31:53,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:31:53,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 358 transitions. [2021-03-11 20:31:53,364 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.817351598173516 [2021-03-11 20:31:53,364 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 358 transitions. [2021-03-11 20:31:53,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 358 transitions. [2021-03-11 20:31:53,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:31:53,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 358 transitions. [2021-03-11 20:31:53,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,367 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,367 INFO L185 Difference]: Start difference. First operand has 37 places, 26 transitions, 91 flow. Second operand 3 states and 358 transitions. [2021-03-11 20:31:53,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 29 transitions, 132 flow [2021-03-11 20:31:53,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 29 transitions, 124 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 20:31:53,369 INFO L241 Difference]: Finished difference. Result has 38 places, 26 transitions, 96 flow [2021-03-11 20:31:53,369 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2021-03-11 20:31:53,369 INFO L335 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2021-03-11 20:31:53,369 INFO L480 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 96 flow [2021-03-11 20:31:53,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 116.75) internal successors, (467), 4 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,370 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:31:53,370 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:31:53,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 20:31:53,370 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:31:53,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:31:53,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1649709601, now seen corresponding path program 1 times [2021-03-11 20:31:53,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:31:53,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906792233] [2021-03-11 20:31:53,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:31:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:31:53,413 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:31:53,414 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:31:53,417 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:31:53,417 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:31:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:31:53,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906792233] [2021-03-11 20:31:53,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:31:53,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:31:53,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409959934] [2021-03-11 20:31:53,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:31:53,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:31:53,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:31:53,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:31:53,424 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 146 [2021-03-11 20:31:53,425 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,425 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:31:53,425 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 146 [2021-03-11 20:31:53,426 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:31:53,480 INFO L129 PetriNetUnfolder]: 25/101 cut-off events. [2021-03-11 20:31:53,480 INFO L130 PetriNetUnfolder]: For 72/148 co-relation queries the response was YES. [2021-03-11 20:31:53,481 INFO L84 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 101 events. 25/101 cut-off events. For 72/148 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 450 event pairs, 10 based on Foata normal form. 7/101 useless extension candidates. Maximal degree in co-relation 219. Up to 49 conditions per place. [2021-03-11 20:31:53,482 INFO L132 encePairwiseOnDemand]: 142/146 looper letters, 1 selfloop transitions, 3 changer transitions 2/27 dead transitions. [2021-03-11 20:31:53,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 27 transitions, 113 flow [2021-03-11 20:31:53,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:31:53,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:31:53,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 495 transitions. [2021-03-11 20:31:53,484 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8476027397260274 [2021-03-11 20:31:53,484 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 495 transitions. [2021-03-11 20:31:53,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 495 transitions. [2021-03-11 20:31:53,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:31:53,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 495 transitions. [2021-03-11 20:31:53,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.75) internal successors, (495), 4 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,488 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,488 INFO L185 Difference]: Start difference. First operand has 38 places, 26 transitions, 96 flow. Second operand 4 states and 495 transitions. [2021-03-11 20:31:53,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 27 transitions, 113 flow [2021-03-11 20:31:53,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 27 transitions, 107 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 20:31:53,490 INFO L241 Difference]: Finished difference. Result has 41 places, 25 transitions, 99 flow [2021-03-11 20:31:53,490 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=99, PETRI_PLACES=41, PETRI_TRANSITIONS=25} [2021-03-11 20:31:53,490 INFO L335 CegarLoopForPetriNet]: 35 programPoint places, 6 predicate places. [2021-03-11 20:31:53,490 INFO L480 AbstractCegarLoop]: Abstraction has has 41 places, 25 transitions, 99 flow [2021-03-11 20:31:53,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,491 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:31:53,491 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:31:53,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 20:31:53,491 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:31:53,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:31:53,492 INFO L82 PathProgramCache]: Analyzing trace with hash 398564095, now seen corresponding path program 1 times [2021-03-11 20:31:53,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:31:53,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108031216] [2021-03-11 20:31:53,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:31:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:31:53,544 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:31:53,546 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:31:53,550 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-03-11 20:31:53,552 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 20:31:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:31:53,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108031216] [2021-03-11 20:31:53,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:31:53,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:31:53,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284374470] [2021-03-11 20:31:53,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:31:53,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:31:53,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:31:53,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:31:53,564 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 146 [2021-03-11 20:31:53,565 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 25 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,565 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:31:53,565 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 146 [2021-03-11 20:31:53,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:31:53,588 INFO L129 PetriNetUnfolder]: 10/54 cut-off events. [2021-03-11 20:31:53,589 INFO L130 PetriNetUnfolder]: For 48/90 co-relation queries the response was YES. [2021-03-11 20:31:53,590 INFO L84 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 54 events. 10/54 cut-off events. For 48/90 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 165 event pairs, 4 based on Foata normal form. 7/60 useless extension candidates. Maximal degree in co-relation 141. Up to 24 conditions per place. [2021-03-11 20:31:53,591 INFO L132 encePairwiseOnDemand]: 143/146 looper letters, 9 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2021-03-11 20:31:53,591 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 28 transitions, 140 flow [2021-03-11 20:31:53,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:31:53,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:31:53,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 358 transitions. [2021-03-11 20:31:53,596 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.817351598173516 [2021-03-11 20:31:53,596 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 358 transitions. [2021-03-11 20:31:53,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 358 transitions. [2021-03-11 20:31:53,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:31:53,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 358 transitions. [2021-03-11 20:31:53,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,602 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,603 INFO L185 Difference]: Start difference. First operand has 41 places, 25 transitions, 99 flow. Second operand 3 states and 358 transitions. [2021-03-11 20:31:53,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 28 transitions, 140 flow [2021-03-11 20:31:53,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 28 transitions, 120 flow, removed 3 selfloop flow, removed 5 redundant places. [2021-03-11 20:31:53,606 INFO L241 Difference]: Finished difference. Result has 39 places, 25 transitions, 93 flow [2021-03-11 20:31:53,606 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=39, PETRI_TRANSITIONS=25} [2021-03-11 20:31:53,606 INFO L335 CegarLoopForPetriNet]: 35 programPoint places, 4 predicate places. [2021-03-11 20:31:53,606 INFO L480 AbstractCegarLoop]: Abstraction has has 39 places, 25 transitions, 93 flow [2021-03-11 20:31:53,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,607 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:31:53,607 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:31:53,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 20:31:53,607 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:31:53,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:31:53,615 INFO L82 PathProgramCache]: Analyzing trace with hash -311485092, now seen corresponding path program 1 times [2021-03-11 20:31:53,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:31:53,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130961181] [2021-03-11 20:31:53,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:31:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:31:53,670 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:31:53,671 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:31:53,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:31:53,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130961181] [2021-03-11 20:31:53,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:31:53,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:31:53,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300781473] [2021-03-11 20:31:53,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 20:31:53,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:31:53,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 20:31:53,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 20:31:53,680 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 146 [2021-03-11 20:31:53,681 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 25 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,681 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:31:53,682 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 146 [2021-03-11 20:31:53,682 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:31:53,693 INFO L129 PetriNetUnfolder]: 9/52 cut-off events. [2021-03-11 20:31:53,694 INFO L130 PetriNetUnfolder]: For 24/28 co-relation queries the response was YES. [2021-03-11 20:31:53,695 INFO L84 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 52 events. 9/52 cut-off events. For 24/28 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 142 event pairs, 3 based on Foata normal form. 3/53 useless extension candidates. Maximal degree in co-relation 112. Up to 22 conditions per place. [2021-03-11 20:31:53,696 INFO L132 encePairwiseOnDemand]: 143/146 looper letters, 1 selfloop transitions, 3 changer transitions 0/25 dead transitions. [2021-03-11 20:31:53,696 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 25 transitions, 101 flow [2021-03-11 20:31:53,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:31:53,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:31:53,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2021-03-11 20:31:53,697 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8789954337899544 [2021-03-11 20:31:53,698 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2021-03-11 20:31:53,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2021-03-11 20:31:53,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:31:53,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2021-03-11 20:31:53,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,700 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,700 INFO L185 Difference]: Start difference. First operand has 39 places, 25 transitions, 93 flow. Second operand 3 states and 385 transitions. [2021-03-11 20:31:53,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 25 transitions, 101 flow [2021-03-11 20:31:53,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 25 transitions, 95 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 20:31:53,703 INFO L241 Difference]: Finished difference. Result has 40 places, 25 transitions, 98 flow [2021-03-11 20:31:53,703 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=40, PETRI_TRANSITIONS=25} [2021-03-11 20:31:53,703 INFO L335 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2021-03-11 20:31:53,704 INFO L480 AbstractCegarLoop]: Abstraction has has 40 places, 25 transitions, 98 flow [2021-03-11 20:31:53,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,704 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:31:53,704 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:31:53,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-11 20:31:53,704 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:31:53,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:31:53,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1957365721, now seen corresponding path program 1 times [2021-03-11 20:31:53,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:31:53,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283207893] [2021-03-11 20:31:53,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:31:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:31:53,729 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:31:53,729 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:31:53,732 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:31:53,732 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:31:53,736 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-03-11 20:31:53,737 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 20:31:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:31:53,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283207893] [2021-03-11 20:31:53,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:31:53,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:31:53,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54614245] [2021-03-11 20:31:53,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 20:31:53,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:31:53,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 20:31:53,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 20:31:53,752 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 146 [2021-03-11 20:31:53,753 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 25 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 112.2) internal successors, (561), 5 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:31:53,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 146 [2021-03-11 20:31:53,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:31:53,781 INFO L129 PetriNetUnfolder]: 12/61 cut-off events. [2021-03-11 20:31:53,782 INFO L130 PetriNetUnfolder]: For 56/87 co-relation queries the response was YES. [2021-03-11 20:31:53,782 INFO L84 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 61 events. 12/61 cut-off events. For 56/87 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 186 event pairs, 3 based on Foata normal form. 3/62 useless extension candidates. Maximal degree in co-relation 163. Up to 27 conditions per place. [2021-03-11 20:31:53,787 INFO L132 encePairwiseOnDemand]: 142/146 looper letters, 8 selfloop transitions, 3 changer transitions 2/28 dead transitions. [2021-03-11 20:31:53,787 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 28 transitions, 141 flow [2021-03-11 20:31:53,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:31:53,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:31:53,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 456 transitions. [2021-03-11 20:31:53,790 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7808219178082192 [2021-03-11 20:31:53,790 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 456 transitions. [2021-03-11 20:31:53,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 456 transitions. [2021-03-11 20:31:53,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:31:53,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 456 transitions. [2021-03-11 20:31:53,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,794 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,794 INFO L185 Difference]: Start difference. First operand has 40 places, 25 transitions, 98 flow. Second operand 4 states and 456 transitions. [2021-03-11 20:31:53,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 28 transitions, 141 flow [2021-03-11 20:31:53,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 28 transitions, 133 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 20:31:53,795 INFO L241 Difference]: Finished difference. Result has 43 places, 24 transitions, 101 flow [2021-03-11 20:31:53,795 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=43, PETRI_TRANSITIONS=24} [2021-03-11 20:31:53,796 INFO L335 CegarLoopForPetriNet]: 35 programPoint places, 8 predicate places. [2021-03-11 20:31:53,796 INFO L480 AbstractCegarLoop]: Abstraction has has 43 places, 24 transitions, 101 flow [2021-03-11 20:31:53,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 112.2) internal successors, (561), 5 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,796 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:31:53,796 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:31:53,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-11 20:31:53,797 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:31:53,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:31:53,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1309017339, now seen corresponding path program 1 times [2021-03-11 20:31:53,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:31:53,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833860315] [2021-03-11 20:31:53,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:31:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:31:53,843 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:31:53,844 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:31:53,847 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:31:53,847 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:31:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:31:53,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833860315] [2021-03-11 20:31:53,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:31:53,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:31:53,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725510679] [2021-03-11 20:31:53,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:31:53,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:31:53,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:31:53,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:31:53,855 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 146 [2021-03-11 20:31:53,856 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 24 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,856 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:31:53,856 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 146 [2021-03-11 20:31:53,856 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:31:53,874 INFO L129 PetriNetUnfolder]: 3/37 cut-off events. [2021-03-11 20:31:53,875 INFO L130 PetriNetUnfolder]: For 52/54 co-relation queries the response was YES. [2021-03-11 20:31:53,875 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 37 events. 3/37 cut-off events. For 52/54 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 2/39 useless extension candidates. Maximal degree in co-relation 92. Up to 13 conditions per place. [2021-03-11 20:31:53,875 INFO L132 encePairwiseOnDemand]: 142/146 looper letters, 1 selfloop transitions, 3 changer transitions 3/25 dead transitions. [2021-03-11 20:31:53,875 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 25 transitions, 118 flow [2021-03-11 20:31:53,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:31:53,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:31:53,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 503 transitions. [2021-03-11 20:31:53,877 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8613013698630136 [2021-03-11 20:31:53,877 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 503 transitions. [2021-03-11 20:31:53,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 503 transitions. [2021-03-11 20:31:53,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:31:53,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 503 transitions. [2021-03-11 20:31:53,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,880 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,881 INFO L185 Difference]: Start difference. First operand has 43 places, 24 transitions, 101 flow. Second operand 4 states and 503 transitions. [2021-03-11 20:31:53,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 25 transitions, 118 flow [2021-03-11 20:31:53,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 25 transitions, 102 flow, removed 3 selfloop flow, removed 5 redundant places. [2021-03-11 20:31:53,883 INFO L241 Difference]: Finished difference. Result has 43 places, 22 transitions, 90 flow [2021-03-11 20:31:53,883 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=43, PETRI_TRANSITIONS=22} [2021-03-11 20:31:53,883 INFO L335 CegarLoopForPetriNet]: 35 programPoint places, 8 predicate places. [2021-03-11 20:31:53,883 INFO L480 AbstractCegarLoop]: Abstraction has has 43 places, 22 transitions, 90 flow [2021-03-11 20:31:53,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,884 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:31:53,884 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:31:53,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-11 20:31:53,884 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:31:53,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:31:53,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1441857283, now seen corresponding path program 1 times [2021-03-11 20:31:53,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:31:53,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989174029] [2021-03-11 20:31:53,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:31:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:31:53,934 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:31:53,934 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:31:53,937 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:31:53,937 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:31:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:31:53,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989174029] [2021-03-11 20:31:53,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:31:53,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:31:53,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703919667] [2021-03-11 20:31:53,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:31:53,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:31:53,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:31:53,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:31:53,944 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 146 [2021-03-11 20:31:53,944 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 22 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,945 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:31:53,945 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 146 [2021-03-11 20:31:53,945 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:31:53,957 INFO L129 PetriNetUnfolder]: 0/21 cut-off events. [2021-03-11 20:31:53,957 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2021-03-11 20:31:53,957 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 21 events. 0/21 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 2/23 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-03-11 20:31:53,957 INFO L132 encePairwiseOnDemand]: 143/146 looper letters, 0 selfloop transitions, 0 changer transitions 21/21 dead transitions. [2021-03-11 20:31:53,957 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 21 transitions, 84 flow [2021-03-11 20:31:53,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:31:53,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:31:53,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 493 transitions. [2021-03-11 20:31:53,960 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8441780821917808 [2021-03-11 20:31:53,960 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 493 transitions. [2021-03-11 20:31:53,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 493 transitions. [2021-03-11 20:31:53,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:31:53,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 493 transitions. [2021-03-11 20:31:53,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.25) internal successors, (493), 4 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,963 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,963 INFO L185 Difference]: Start difference. First operand has 43 places, 22 transitions, 90 flow. Second operand 4 states and 493 transitions. [2021-03-11 20:31:53,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 21 transitions, 84 flow [2021-03-11 20:31:53,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 21 transitions, 60 flow, removed 3 selfloop flow, removed 9 redundant places. [2021-03-11 20:31:53,964 INFO L241 Difference]: Finished difference. Result has 36 places, 0 transitions, 0 flow [2021-03-11 20:31:53,965 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=36, PETRI_TRANSITIONS=0} [2021-03-11 20:31:53,965 INFO L335 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2021-03-11 20:31:53,965 INFO L480 AbstractCegarLoop]: Abstraction has has 36 places, 0 transitions, 0 flow [2021-03-11 20:31:53,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:31:53,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-11 20:31:53,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 08:31:53 BasicIcfg [2021-03-11 20:31:53,969 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 20:31:53,972 INFO L168 Benchmark]: Toolchain (without parser) took 5088.29 ms. Allocated memory was 255.9 MB in the beginning and 425.7 MB in the end (delta: 169.9 MB). Free memory was 234.9 MB in the beginning and 330.5 MB in the end (delta: -95.5 MB). Peak memory consumption was 72.8 MB. Max. memory is 16.0 GB. [2021-03-11 20:31:53,972 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 20:31:53,973 INFO L168 Benchmark]: CACSL2BoogieTranslator took 535.21 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 234.5 MB in the beginning and 316.8 MB in the end (delta: -82.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-03-11 20:31:53,976 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.45 ms. Allocated memory is still 354.4 MB. Free memory was 316.8 MB in the beginning and 314.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:31:53,976 INFO L168 Benchmark]: Boogie Preprocessor took 19.70 ms. Allocated memory is still 354.4 MB. Free memory was 314.8 MB in the beginning and 313.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:31:53,976 INFO L168 Benchmark]: RCFGBuilder took 416.16 ms. Allocated memory is still 354.4 MB. Free memory was 313.2 MB in the beginning and 288.5 MB in the end (delta: 24.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.0 GB. [2021-03-11 20:31:53,978 INFO L168 Benchmark]: TraceAbstraction took 4068.89 ms. Allocated memory was 354.4 MB in the beginning and 425.7 MB in the end (delta: 71.3 MB). Free memory was 288.0 MB in the beginning and 330.5 MB in the end (delta: -42.5 MB). Peak memory consumption was 30.3 MB. Max. memory is 16.0 GB. [2021-03-11 20:31:53,982 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 535.21 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 234.5 MB in the beginning and 316.8 MB in the end (delta: -82.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 37.45 ms. Allocated memory is still 354.4 MB. Free memory was 316.8 MB in the beginning and 314.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 19.70 ms. Allocated memory is still 354.4 MB. Free memory was 314.8 MB in the beginning and 313.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 416.16 ms. Allocated memory is still 354.4 MB. Free memory was 313.2 MB in the beginning and 288.5 MB in the end (delta: 24.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 4068.89 ms. Allocated memory was 354.4 MB in the beginning and 425.7 MB in the end (delta: 71.3 MB). Free memory was 288.0 MB in the beginning and 330.5 MB in the end (delta: -42.5 MB). Peak memory consumption was 30.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2696.2ms, 85 PlacesBefore, 35 PlacesAfterwards, 73 TransitionsBefore, 23 TransitionsAfterwards, 1392 CoEnabledTransitionPairs, 5 FixpointIterations, 21 TrivialSequentialCompositions, 29 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 0 ChoiceCompositions, 55 TotalNumberOfCompositions, 2962 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1961, positive: 1856, positive conditional: 0, positive unconditional: 1856, negative: 105, negative conditional: 0, negative unconditional: 105, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1034, positive: 996, positive conditional: 0, positive unconditional: 996, negative: 38, negative conditional: 0, negative unconditional: 38, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1034, positive: 982, positive conditional: 0, positive unconditional: 982, negative: 52, negative conditional: 0, negative unconditional: 52, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 52, positive: 14, positive conditional: 0, positive unconditional: 14, negative: 38, negative conditional: 0, negative unconditional: 38, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 195, positive: 59, positive conditional: 0, positive unconditional: 59, negative: 135, negative conditional: 0, negative unconditional: 135, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1961, positive: 860, positive conditional: 0, positive unconditional: 860, negative: 67, negative conditional: 0, negative unconditional: 67, unknown: 1034, unknown conditional: 0, unknown unconditional: 1034] , Statistics on independence cache: Total cache size (in pairs): 175, Positive cache size: 160, Positive conditional cache size: 0, Positive unconditional cache size: 160, Negative cache size: 15, Negative conditional cache size: 0, Negative unconditional cache size: 15 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 90 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 3977.9ms, OverallIterations: 10, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 391.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2788.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 41 SDtfs, 16 SDslu, 11 SDs, 0 SdLazy, 46 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 50.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 81.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=8, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 20.5ms SsaConstructionTime, 160.2ms SatisfiabilityAnalysisTime, 427.8ms InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 118 ConstructedInterpolants, 0 QuantifiedInterpolants, 562 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...