/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/safe004_tso.oepc.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 20:20:38,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 20:20:38,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 20:20:38,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 20:20:38,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 20:20:38,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 20:20:38,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 20:20:38,638 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 20:20:38,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 20:20:38,640 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 20:20:38,640 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 20:20:38,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 20:20:38,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 20:20:38,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 20:20:38,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 20:20:38,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 20:20:38,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 20:20:38,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 20:20:38,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 20:20:38,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 20:20:38,648 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 20:20:38,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 20:20:38,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 20:20:38,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 20:20:38,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 20:20:38,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 20:20:38,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 20:20:38,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 20:20:38,679 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 20:20:38,706 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 20:20:38,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 20:20:38,709 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 20:20:38,709 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 20:20:38,709 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 20:20:38,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 20:20:38,710 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 20:20:38,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 20:20:38,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 20:20:38,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 20:20:38,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 20:20:38,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 20:20:38,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 20:20:38,711 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 20:20:38,711 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 20:20:38,711 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 20:20:38,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 20:20:38,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 20:20:38,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 20:20:38,712 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 20:20:38,712 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 20:20:38,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 20:20:38,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 20:20:38,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 20:20:38,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 20:20:38,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 20:20:38,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 20:20:38,712 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 20:20:38,712 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 20:20:38,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 20:20:39,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 20:20:39,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 20:20:39,017 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-11 20:20:39,018 INFO L275 PluginConnector]: CDTParser initialized [2021-03-11 20:20:39,019 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe004_tso.oepc.i [2021-03-11 20:20:39,075 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a7c88601/465bcfbf746549c0858ddf08869f1925/FLAGc036848d5 [2021-03-11 20:20:39,545 INFO L306 CDTParser]: Found 1 translation units. [2021-03-11 20:20:39,545 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_tso.oepc.i [2021-03-11 20:20:39,558 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a7c88601/465bcfbf746549c0858ddf08869f1925/FLAGc036848d5 [2021-03-11 20:20:40,048 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a7c88601/465bcfbf746549c0858ddf08869f1925 [2021-03-11 20:20:40,049 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 20:20:40,053 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-11 20:20:40,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-11 20:20:40,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-11 20:20:40,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-11 20:20:40,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 08:20:40" (1/1) ... [2021-03-11 20:20:40,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16ad4ecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:40, skipping insertion in model container [2021-03-11 20:20:40,063 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 08:20:40" (1/1) ... [2021-03-11 20:20:40,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-11 20:20:40,106 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-11 20:20:40,235 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/safe004_tso.oepc.i[950,963] [2021-03-11 20:20:40,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 20:20:40,324 INFO L203 MainTranslator]: Completed pre-run [2021-03-11 20:20:40,335 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/safe004_tso.oepc.i[950,963] [2021-03-11 20:20:40,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 20:20:40,434 INFO L208 MainTranslator]: Completed translation [2021-03-11 20:20:40,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:40 WrapperNode [2021-03-11 20:20:40,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-11 20:20:40,435 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 20:20:40,435 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 20:20:40,436 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 20:20:40,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:40" (1/1) ... [2021-03-11 20:20:40,454 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:40" (1/1) ... [2021-03-11 20:20:40,471 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 20:20:40,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 20:20:40,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 20:20:40,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 20:20:40,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:40" (1/1) ... [2021-03-11 20:20:40,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:40" (1/1) ... [2021-03-11 20:20:40,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:40" (1/1) ... [2021-03-11 20:20:40,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:40" (1/1) ... [2021-03-11 20:20:40,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:40" (1/1) ... [2021-03-11 20:20:40,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:40" (1/1) ... [2021-03-11 20:20:40,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:40" (1/1) ... [2021-03-11 20:20:40,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 20:20:40,486 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 20:20:40,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 20:20:40,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 20:20:40,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:40" (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 20:20:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-11 20:20:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-11 20:20:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-11 20:20:40,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-11 20:20:40,537 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-03-11 20:20:40,537 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-03-11 20:20:40,537 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-03-11 20:20:40,538 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-03-11 20:20:40,538 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-03-11 20:20:40,538 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-03-11 20:20:40,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-11 20:20:40,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-11 20:20:40,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 20:20:40,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 20:20:40,539 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 20:20:40,786 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 20:20:40,787 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-03-11 20:20:40,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 08:20:40 BoogieIcfgContainer [2021-03-11 20:20:40,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 20:20:40,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 20:20:40,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 20:20:40,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 20:20:40,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.03 08:20:40" (1/3) ... [2021-03-11 20:20:40,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f825d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 08:20:40, skipping insertion in model container [2021-03-11 20:20:40,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:40" (2/3) ... [2021-03-11 20:20:40,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f825d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 08:20:40, skipping insertion in model container [2021-03-11 20:20:40,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 08:20:40" (3/3) ... [2021-03-11 20:20:40,793 INFO L111 eAbstractionObserver]: Analyzing ICFG safe004_tso.oepc.i [2021-03-11 20:20:40,798 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 20:20:40,801 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 20:20:40,802 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 20:20:40,848 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,848 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,849 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,849 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,849 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,849 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,849 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,849 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,849 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,850 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,850 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,850 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,851 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,851 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,851 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,851 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,852 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,852 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,852 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,852 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,852 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,852 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,853 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,853 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,855 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,855 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,856 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,856 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,856 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,856 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,857 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,857 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,857 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,857 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,857 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,858 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,860 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,860 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,860 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,860 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,865 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,866 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,866 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,866 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,871 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,871 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,871 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,871 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:40,876 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 20:20:40,890 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 20:20:40,917 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 20:20:40,917 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 20:20:40,917 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 20:20:40,917 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 20:20:40,918 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 20:20:40,918 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 20:20:40,918 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 20:20:40,918 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 20:20:40,929 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 74 transitions, 163 flow [2021-03-11 20:20:40,978 INFO L129 PetriNetUnfolder]: 2/71 cut-off events. [2021-03-11 20:20:40,978 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:20:40,983 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 71 events. 2/71 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 57 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 56. Up to 2 conditions per place. [2021-03-11 20:20:40,983 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 74 transitions, 163 flow [2021-03-11 20:20:40,993 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 59 transitions, 127 flow [2021-03-11 20:20:40,996 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 20:20:41,006 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 59 transitions, 127 flow [2021-03-11 20:20:41,008 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 59 transitions, 127 flow [2021-03-11 20:20:41,009 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 68 places, 59 transitions, 127 flow [2021-03-11 20:20:41,030 INFO L129 PetriNetUnfolder]: 1/59 cut-off events. [2021-03-11 20:20:41,031 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:20:41,031 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 59 events. 1/59 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2021-03-11 20:20:41,033 INFO L116 LiptonReduction]: Number of co-enabled transitions 864 [2021-03-11 20:20:42,736 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-03-11 20:20:42,921 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-03-11 20:20:43,004 INFO L131 LiptonReduction]: Checked pairs total: 1775 [2021-03-11 20:20:43,004 INFO L133 LiptonReduction]: Total number of compositions: 46 [2021-03-11 20:20:43,005 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2012 [2021-03-11 20:20:43,011 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-11 20:20:43,011 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:20:43,011 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:20:43,011 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:20:43,011 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:20:43,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:20:43,014 INFO L82 PathProgramCache]: Analyzing trace with hash 2056446484, now seen corresponding path program 1 times [2021-03-11 20:20:43,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:20:43,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49025879] [2021-03-11 20:20:43,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:20:43,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:20:43,119 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:20:43,119 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:20:43,120 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 20:20:43,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49025879] [2021-03-11 20:20:43,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:20:43,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:20:43,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884936411] [2021-03-11 20:20:43,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-03-11 20:20:43,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:20:43,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-03-11 20:20:43,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-03-11 20:20:43,136 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 120 [2021-03-11 20:20:43,137 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 45 flow. Second operand has 2 states, 2 states have (on average 113.5) internal successors, (227), 2 states have internal predecessors, (227), 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 20:20:43,137 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:20:43,137 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 120 [2021-03-11 20:20:43,138 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:20:43,142 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-11 20:20:43,142 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:20:43,143 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 17 events. 0/17 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs, 0 based on Foata normal form. 1/18 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-03-11 20:20:43,143 INFO L132 encePairwiseOnDemand]: 119/120 looper letters, 0 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2021-03-11 20:20:43,143 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 17 transitions, 43 flow [2021-03-11 20:20:43,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-03-11 20:20:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-03-11 20:20:43,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 227 transitions. [2021-03-11 20:20:43,151 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9458333333333333 [2021-03-11 20:20:43,151 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 227 transitions. [2021-03-11 20:20:43,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 227 transitions. [2021-03-11 20:20:43,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:20:43,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 227 transitions. [2021-03-11 20:20:43,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 113.5) internal successors, (227), 2 states have internal predecessors, (227), 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 20:20:43,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 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 20:20:43,159 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 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 20:20:43,160 INFO L185 Difference]: Start difference. First operand has 27 places, 18 transitions, 45 flow. Second operand 2 states and 227 transitions. [2021-03-11 20:20:43,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 17 transitions, 43 flow [2021-03-11 20:20:43,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 17 transitions, 40 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-03-11 20:20:43,163 INFO L241 Difference]: Finished difference. Result has 25 places, 17 transitions, 40 flow [2021-03-11 20:20:43,164 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=40, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2021-03-11 20:20:43,164 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, -2 predicate places. [2021-03-11 20:20:43,164 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 40 flow [2021-03-11 20:20:43,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 113.5) internal successors, (227), 2 states have internal predecessors, (227), 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 20:20:43,165 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:20:43,165 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:20:43,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 20:20:43,165 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:20:43,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:20:43,166 INFO L82 PathProgramCache]: Analyzing trace with hash -674668314, now seen corresponding path program 1 times [2021-03-11 20:20:43,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:20:43,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448158968] [2021-03-11 20:20:43,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:20:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:20:43,273 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-03-11 20:20:43,274 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 20:20:43,284 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 20:20:43,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448158968] [2021-03-11 20:20:43,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:20:43,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:20:43,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874658817] [2021-03-11 20:20:43,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 20:20:43,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:20:43,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 20:20:43,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 20:20:43,287 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 120 [2021-03-11 20:20:43,287 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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 20:20:43,287 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:20:43,287 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 120 [2021-03-11 20:20:43,287 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:20:43,318 INFO L129 PetriNetUnfolder]: 91/209 cut-off events. [2021-03-11 20:20:43,319 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:20:43,319 INFO L84 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 209 events. 91/209 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 946 event pairs, 29 based on Foata normal form. 20/220 useless extension candidates. Maximal degree in co-relation 381. Up to 113 conditions per place. [2021-03-11 20:20:43,320 INFO L132 encePairwiseOnDemand]: 112/120 looper letters, 7 selfloop transitions, 7 changer transitions 0/23 dead transitions. [2021-03-11 20:20:43,320 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 23 transitions, 80 flow [2021-03-11 20:20:43,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:20:43,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:20:43,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2021-03-11 20:20:43,322 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7833333333333333 [2021-03-11 20:20:43,322 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 282 transitions. [2021-03-11 20:20:43,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 282 transitions. [2021-03-11 20:20:43,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:20:43,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 282 transitions. [2021-03-11 20:20:43,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 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 20:20:43,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 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 20:20:43,325 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 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 20:20:43,325 INFO L185 Difference]: Start difference. First operand has 25 places, 17 transitions, 40 flow. Second operand 3 states and 282 transitions. [2021-03-11 20:20:43,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 23 transitions, 80 flow [2021-03-11 20:20:43,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 23 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-11 20:20:43,326 INFO L241 Difference]: Finished difference. Result has 29 places, 23 transitions, 94 flow [2021-03-11 20:20:43,327 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2021-03-11 20:20:43,327 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2021-03-11 20:20:43,327 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 94 flow [2021-03-11 20:20:43,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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 20:20:43,327 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:20:43,327 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:20:43,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 20:20:43,328 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:20:43,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:20:43,328 INFO L82 PathProgramCache]: Analyzing trace with hash 560118217, now seen corresponding path program 1 times [2021-03-11 20:20:43,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:20:43,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596491918] [2021-03-11 20:20:43,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:20:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:20:43,362 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:20:43,362 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:20:43,365 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-03-11 20:20:43,365 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 20:20:43,371 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 20:20:43,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596491918] [2021-03-11 20:20:43,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:20:43,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:20:43,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362672579] [2021-03-11 20:20:43,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:20:43,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:20:43,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:20:43,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:20:43,374 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 120 [2021-03-11 20:20:43,374 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 89.75) internal successors, (359), 4 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 20:20:43,374 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:20:43,374 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 120 [2021-03-11 20:20:43,374 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:20:43,407 INFO L129 PetriNetUnfolder]: 48/127 cut-off events. [2021-03-11 20:20:43,407 INFO L130 PetriNetUnfolder]: For 43/119 co-relation queries the response was YES. [2021-03-11 20:20:43,408 INFO L84 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 127 events. 48/127 cut-off events. For 43/119 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 478 event pairs, 5 based on Foata normal form. 6/129 useless extension candidates. Maximal degree in co-relation 380. Up to 66 conditions per place. [2021-03-11 20:20:43,409 INFO L132 encePairwiseOnDemand]: 113/120 looper letters, 13 selfloop transitions, 7 changer transitions 2/31 dead transitions. [2021-03-11 20:20:43,409 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 178 flow [2021-03-11 20:20:43,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:20:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:20:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 373 transitions. [2021-03-11 20:20:43,411 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7770833333333333 [2021-03-11 20:20:43,412 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 373 transitions. [2021-03-11 20:20:43,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 373 transitions. [2021-03-11 20:20:43,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:20:43,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 373 transitions. [2021-03-11 20:20:43,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 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 20:20:43,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 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 20:20:43,416 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 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 20:20:43,416 INFO L185 Difference]: Start difference. First operand has 29 places, 23 transitions, 94 flow. Second operand 4 states and 373 transitions. [2021-03-11 20:20:43,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 178 flow [2021-03-11 20:20:43,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 31 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 20:20:43,418 INFO L241 Difference]: Finished difference. Result has 33 places, 27 transitions, 134 flow [2021-03-11 20:20:43,418 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2021-03-11 20:20:43,418 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2021-03-11 20:20:43,419 INFO L480 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 134 flow [2021-03-11 20:20:43,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 89.75) internal successors, (359), 4 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 20:20:43,421 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:20:43,421 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:20:43,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 20:20:43,424 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:20:43,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:20:43,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1402536342, now seen corresponding path program 1 times [2021-03-11 20:20:43,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:20:43,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057103726] [2021-03-11 20:20:43,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:20:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:20:43,488 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:20:43,489 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:20:43,499 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 20:20:43,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057103726] [2021-03-11 20:20:43,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:20:43,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:20:43,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139117325] [2021-03-11 20:20:43,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 20:20:43,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:20:43,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 20:20:43,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 20:20:43,501 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 120 [2021-03-11 20:20:43,501 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 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 20:20:43,501 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:20:43,501 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 120 [2021-03-11 20:20:43,501 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:20:43,517 INFO L129 PetriNetUnfolder]: 46/121 cut-off events. [2021-03-11 20:20:43,517 INFO L130 PetriNetUnfolder]: For 96/101 co-relation queries the response was YES. [2021-03-11 20:20:43,517 INFO L84 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 121 events. 46/121 cut-off events. For 96/101 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 443 event pairs, 4 based on Foata normal form. 2/120 useless extension candidates. Maximal degree in co-relation 347. Up to 65 conditions per place. [2021-03-11 20:20:43,518 INFO L132 encePairwiseOnDemand]: 116/120 looper letters, 4 selfloop transitions, 7 changer transitions 2/32 dead transitions. [2021-03-11 20:20:43,518 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 192 flow [2021-03-11 20:20:43,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:20:43,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:20:43,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2021-03-11 20:20:43,519 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8611111111111112 [2021-03-11 20:20:43,519 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2021-03-11 20:20:43,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2021-03-11 20:20:43,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:20:43,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2021-03-11 20:20:43,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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 20:20:43,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 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 20:20:43,521 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 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 20:20:43,521 INFO L185 Difference]: Start difference. First operand has 33 places, 27 transitions, 134 flow. Second operand 3 states and 310 transitions. [2021-03-11 20:20:43,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 192 flow [2021-03-11 20:20:43,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 20:20:43,522 INFO L241 Difference]: Finished difference. Result has 35 places, 30 transitions, 180 flow [2021-03-11 20:20:43,523 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2021-03-11 20:20:43,523 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 8 predicate places. [2021-03-11 20:20:43,523 INFO L480 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 180 flow [2021-03-11 20:20:43,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 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 20:20:43,523 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:20:43,523 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:20:43,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 20:20:43,523 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:20:43,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:20:43,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1371516161, now seen corresponding path program 1 times [2021-03-11 20:20:43,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:20:43,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474829772] [2021-03-11 20:20:43,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:20:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:20:43,559 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:20:43,559 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:20:43,561 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 20:20:43,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474829772] [2021-03-11 20:20:43,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:20:43,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:20:43,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898682238] [2021-03-11 20:20:43,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 20:20:43,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:20:43,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 20:20:43,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 20:20:43,563 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 120 [2021-03-11 20:20:43,563 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 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 20:20:43,563 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:20:43,563 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 120 [2021-03-11 20:20:43,564 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:20:43,576 INFO L129 PetriNetUnfolder]: 35/102 cut-off events. [2021-03-11 20:20:43,576 INFO L130 PetriNetUnfolder]: For 91/105 co-relation queries the response was YES. [2021-03-11 20:20:43,576 INFO L84 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 102 events. 35/102 cut-off events. For 91/105 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 355 event pairs, 0 based on Foata normal form. 1/101 useless extension candidates. Maximal degree in co-relation 355. Up to 54 conditions per place. [2021-03-11 20:20:43,577 INFO L132 encePairwiseOnDemand]: 116/120 looper letters, 12 selfloop transitions, 7 changer transitions 2/39 dead transitions. [2021-03-11 20:20:43,577 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 39 transitions, 276 flow [2021-03-11 20:20:43,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:20:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:20:43,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 305 transitions. [2021-03-11 20:20:43,578 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8472222222222222 [2021-03-11 20:20:43,578 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 305 transitions. [2021-03-11 20:20:43,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 305 transitions. [2021-03-11 20:20:43,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:20:43,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 305 transitions. [2021-03-11 20:20:43,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 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 20:20:43,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 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 20:20:43,580 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 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 20:20:43,580 INFO L185 Difference]: Start difference. First operand has 35 places, 30 transitions, 180 flow. Second operand 3 states and 305 transitions. [2021-03-11 20:20:43,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 39 transitions, 276 flow [2021-03-11 20:20:43,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 39 transitions, 269 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 20:20:43,581 INFO L241 Difference]: Finished difference. Result has 37 places, 33 transitions, 222 flow [2021-03-11 20:20:43,582 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2021-03-11 20:20:43,582 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2021-03-11 20:20:43,582 INFO L480 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 222 flow [2021-03-11 20:20:43,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 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 20:20:43,582 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:20:43,582 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:20:43,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 20:20:43,582 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:20:43,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:20:43,583 INFO L82 PathProgramCache]: Analyzing trace with hash -412114848, now seen corresponding path program 1 times [2021-03-11 20:20:43,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:20:43,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871283228] [2021-03-11 20:20:43,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:20:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:20:43,602 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:20:43,603 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:20:43,605 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:20:43,605 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:20:43,607 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 20:20:43,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871283228] [2021-03-11 20:20:43,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:20:43,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:20:43,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562212998] [2021-03-11 20:20:43,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:20:43,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:20:43,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:20:43,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:20:43,609 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 120 [2021-03-11 20:20:43,609 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 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 20:20:43,610 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:20:43,610 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 120 [2021-03-11 20:20:43,610 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:20:43,637 INFO L129 PetriNetUnfolder]: 32/115 cut-off events. [2021-03-11 20:20:43,637 INFO L130 PetriNetUnfolder]: For 161/175 co-relation queries the response was YES. [2021-03-11 20:20:43,640 INFO L84 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 115 events. 32/115 cut-off events. For 161/175 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 478 event pairs, 1 based on Foata normal form. 3/116 useless extension candidates. Maximal degree in co-relation 426. Up to 59 conditions per place. [2021-03-11 20:20:43,641 INFO L132 encePairwiseOnDemand]: 115/120 looper letters, 5 selfloop transitions, 5 changer transitions 16/42 dead transitions. [2021-03-11 20:20:43,641 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 42 transitions, 332 flow [2021-03-11 20:20:43,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:20:43,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:20:43,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 390 transitions. [2021-03-11 20:20:43,643 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8125 [2021-03-11 20:20:43,643 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 390 transitions. [2021-03-11 20:20:43,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 390 transitions. [2021-03-11 20:20:43,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:20:43,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 390 transitions. [2021-03-11 20:20:43,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 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 20:20:43,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 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 20:20:43,645 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 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 20:20:43,645 INFO L185 Difference]: Start difference. First operand has 37 places, 33 transitions, 222 flow. Second operand 4 states and 390 transitions. [2021-03-11 20:20:43,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 42 transitions, 332 flow [2021-03-11 20:20:43,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 42 transitions, 325 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 20:20:43,648 INFO L241 Difference]: Finished difference. Result has 40 places, 26 transitions, 176 flow [2021-03-11 20:20:43,648 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=40, PETRI_TRANSITIONS=26} [2021-03-11 20:20:43,648 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 13 predicate places. [2021-03-11 20:20:43,648 INFO L480 AbstractCegarLoop]: Abstraction has has 40 places, 26 transitions, 176 flow [2021-03-11 20:20:43,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 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 20:20:43,649 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:20:43,649 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:20:43,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 20:20:43,649 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:20:43,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:20:43,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1814329288, now seen corresponding path program 2 times [2021-03-11 20:20:43,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:20:43,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780470111] [2021-03-11 20:20:43,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:20:43,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:20:43,689 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:20:43,690 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:20:43,691 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:20:43,691 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:20:43,694 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:20:43,694 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:20:43,700 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-03-11 20:20:43,700 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 20:20:43,708 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 20:20:43,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780470111] [2021-03-11 20:20:43,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:20:43,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 20:20:43,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780496401] [2021-03-11 20:20:43,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 20:20:43,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:20:43,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 20:20:43,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 20:20:43,713 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 120 [2021-03-11 20:20:43,714 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 26 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 90.2) internal successors, (451), 5 states have internal predecessors, (451), 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 20:20:43,714 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:20:43,714 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 120 [2021-03-11 20:20:43,714 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:20:43,775 INFO L129 PetriNetUnfolder]: 4/41 cut-off events. [2021-03-11 20:20:43,775 INFO L130 PetriNetUnfolder]: For 77/110 co-relation queries the response was YES. [2021-03-11 20:20:43,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 41 events. 4/41 cut-off events. For 77/110 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 86 event pairs, 0 based on Foata normal form. 9/50 useless extension candidates. Maximal degree in co-relation 157. Up to 18 conditions per place. [2021-03-11 20:20:43,776 INFO L132 encePairwiseOnDemand]: 113/120 looper letters, 3 selfloop transitions, 5 changer transitions 13/30 dead transitions. [2021-03-11 20:20:43,776 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 30 transitions, 250 flow [2021-03-11 20:20:43,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 20:20:43,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-11 20:20:43,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 639 transitions. [2021-03-11 20:20:43,778 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7607142857142857 [2021-03-11 20:20:43,778 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 639 transitions. [2021-03-11 20:20:43,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 639 transitions. [2021-03-11 20:20:43,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:20:43,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 639 transitions. [2021-03-11 20:20:43,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 91.28571428571429) internal successors, (639), 7 states have internal predecessors, (639), 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 20:20:43,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 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 20:20:43,781 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 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 20:20:43,781 INFO L185 Difference]: Start difference. First operand has 40 places, 26 transitions, 176 flow. Second operand 7 states and 639 transitions. [2021-03-11 20:20:43,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 30 transitions, 250 flow [2021-03-11 20:20:43,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 30 transitions, 225 flow, removed 3 selfloop flow, removed 4 redundant places. [2021-03-11 20:20:43,783 INFO L241 Difference]: Finished difference. Result has 44 places, 17 transitions, 104 flow [2021-03-11 20:20:43,783 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=17} [2021-03-11 20:20:43,783 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2021-03-11 20:20:43,783 INFO L480 AbstractCegarLoop]: Abstraction has has 44 places, 17 transitions, 104 flow [2021-03-11 20:20:43,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 90.2) internal successors, (451), 5 states have internal predecessors, (451), 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 20:20:43,783 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:20:43,783 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:20:43,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-11 20:20:43,784 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:20:43,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:20:43,784 INFO L82 PathProgramCache]: Analyzing trace with hash 988997074, now seen corresponding path program 1 times [2021-03-11 20:20:43,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:20:43,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349397233] [2021-03-11 20:20:43,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:20:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:20:43,824 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:20:43,824 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:20:43,827 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:20:43,827 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:20:43,830 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 20:20:43,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349397233] [2021-03-11 20:20:43,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:20:43,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:20:43,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220955728] [2021-03-11 20:20:43,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:20:43,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:20:43,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:20:43,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:20:43,832 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 120 [2021-03-11 20:20:43,832 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 17 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 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 20:20:43,832 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:20:43,832 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 120 [2021-03-11 20:20:43,832 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:20:43,866 INFO L129 PetriNetUnfolder]: 23/66 cut-off events. [2021-03-11 20:20:43,866 INFO L130 PetriNetUnfolder]: For 133/146 co-relation queries the response was YES. [2021-03-11 20:20:43,866 INFO L84 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 66 events. 23/66 cut-off events. For 133/146 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 195 event pairs, 9 based on Foata normal form. 5/66 useless extension candidates. Maximal degree in co-relation 177. Up to 39 conditions per place. [2021-03-11 20:20:43,866 INFO L132 encePairwiseOnDemand]: 114/120 looper letters, 5 selfloop transitions, 3 changer transitions 8/27 dead transitions. [2021-03-11 20:20:43,866 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 27 transitions, 156 flow [2021-03-11 20:20:43,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 20:20:43,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 20:20:43,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 448 transitions. [2021-03-11 20:20:43,868 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7466666666666667 [2021-03-11 20:20:43,868 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 448 transitions. [2021-03-11 20:20:43,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 448 transitions. [2021-03-11 20:20:43,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:20:43,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 448 transitions. [2021-03-11 20:20:43,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 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 20:20:43,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 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 20:20:43,870 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 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 20:20:43,870 INFO L185 Difference]: Start difference. First operand has 44 places, 17 transitions, 104 flow. Second operand 5 states and 448 transitions. [2021-03-11 20:20:43,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 27 transitions, 156 flow [2021-03-11 20:20:43,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 27 transitions, 117 flow, removed 8 selfloop flow, removed 10 redundant places. [2021-03-11 20:20:43,871 INFO L241 Difference]: Finished difference. Result has 39 places, 19 transitions, 96 flow [2021-03-11 20:20:43,871 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=39, PETRI_TRANSITIONS=19} [2021-03-11 20:20:43,871 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 12 predicate places. [2021-03-11 20:20:43,871 INFO L480 AbstractCegarLoop]: Abstraction has has 39 places, 19 transitions, 96 flow [2021-03-11 20:20:43,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 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 20:20:43,872 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:20:43,872 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:20:43,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-11 20:20:43,872 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:20:43,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:20:43,872 INFO L82 PathProgramCache]: Analyzing trace with hash -658015996, now seen corresponding path program 1 times [2021-03-11 20:20:43,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:20:43,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877456089] [2021-03-11 20:20:43,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:20:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:20:43,907 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:20:43,907 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:20:43,910 INFO L142 QuantifierPusher]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 20:20:43,910 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-03-11 20:20:43,913 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:20:43,913 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:20:43,916 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 20:20:43,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877456089] [2021-03-11 20:20:43,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:20:43,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:20:43,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331829629] [2021-03-11 20:20:43,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 20:20:43,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:20:43,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 20:20:43,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 20:20:43,918 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 120 [2021-03-11 20:20:43,918 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 19 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 86.8) internal successors, (434), 5 states have internal predecessors, (434), 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 20:20:43,918 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:20:43,919 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 120 [2021-03-11 20:20:43,919 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:20:43,945 INFO L129 PetriNetUnfolder]: 9/40 cut-off events. [2021-03-11 20:20:43,945 INFO L130 PetriNetUnfolder]: For 97/137 co-relation queries the response was YES. [2021-03-11 20:20:43,945 INFO L84 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 40 events. 9/40 cut-off events. For 97/137 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 80 event pairs, 1 based on Foata normal form. 9/47 useless extension candidates. Maximal degree in co-relation 138. Up to 27 conditions per place. [2021-03-11 20:20:43,945 INFO L132 encePairwiseOnDemand]: 114/120 looper letters, 3 selfloop transitions, 5 changer transitions 10/29 dead transitions. [2021-03-11 20:20:43,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 29 transitions, 190 flow [2021-03-11 20:20:43,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 20:20:43,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 20:20:43,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 536 transitions. [2021-03-11 20:20:43,947 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7444444444444445 [2021-03-11 20:20:43,947 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 536 transitions. [2021-03-11 20:20:43,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 536 transitions. [2021-03-11 20:20:43,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:20:43,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 536 transitions. [2021-03-11 20:20:43,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.33333333333333) internal successors, (536), 6 states have internal predecessors, (536), 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 20:20:43,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 120.0) internal successors, (840), 7 states have internal predecessors, (840), 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 20:20:43,949 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 120.0) internal successors, (840), 7 states have internal predecessors, (840), 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 20:20:43,949 INFO L185 Difference]: Start difference. First operand has 39 places, 19 transitions, 96 flow. Second operand 6 states and 536 transitions. [2021-03-11 20:20:43,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 29 transitions, 190 flow [2021-03-11 20:20:43,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 29 transitions, 181 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-03-11 20:20:43,950 INFO L241 Difference]: Finished difference. Result has 42 places, 19 transitions, 111 flow [2021-03-11 20:20:43,950 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=111, PETRI_PLACES=42, PETRI_TRANSITIONS=19} [2021-03-11 20:20:43,951 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 15 predicate places. [2021-03-11 20:20:43,951 INFO L480 AbstractCegarLoop]: Abstraction has has 42 places, 19 transitions, 111 flow [2021-03-11 20:20:43,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 86.8) internal successors, (434), 5 states have internal predecessors, (434), 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 20:20:43,951 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:20:43,951 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:20:43,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-11 20:20:43,951 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:20:43,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:20:43,952 INFO L82 PathProgramCache]: Analyzing trace with hash 115161329, now seen corresponding path program 1 times [2021-03-11 20:20:43,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:20:43,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841183351] [2021-03-11 20:20:43,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:20:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:20:43,988 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:20:43,988 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:20:43,990 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:20:43,991 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:20:43,994 INFO L142 QuantifierPusher]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 20:20:43,994 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-03-11 20:20:43,998 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:20:43,998 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:20:44,002 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 20:20:44,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841183351] [2021-03-11 20:20:44,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:20:44,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 20:20:44,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913019544] [2021-03-11 20:20:44,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 20:20:44,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:20:44,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 20:20:44,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 20:20:44,004 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 120 [2021-03-11 20:20:44,005 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 19 transitions, 111 flow. Second operand has 6 states, 6 states have (on average 86.83333333333333) internal successors, (521), 6 states have internal predecessors, (521), 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 20:20:44,005 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:20:44,005 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 120 [2021-03-11 20:20:44,005 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:20:44,026 INFO L129 PetriNetUnfolder]: 1/20 cut-off events. [2021-03-11 20:20:44,026 INFO L130 PetriNetUnfolder]: For 57/77 co-relation queries the response was YES. [2021-03-11 20:20:44,026 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 20 events. 1/20 cut-off events. For 57/77 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs, 0 based on Foata normal form. 5/25 useless extension candidates. Maximal degree in co-relation 70. Up to 9 conditions per place. [2021-03-11 20:20:44,027 INFO L132 encePairwiseOnDemand]: 114/120 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2021-03-11 20:20:44,027 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 20 transitions, 133 flow [2021-03-11 20:20:44,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 20:20:44,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-11 20:20:44,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 612 transitions. [2021-03-11 20:20:44,028 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7285714285714285 [2021-03-11 20:20:44,028 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 612 transitions. [2021-03-11 20:20:44,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 612 transitions. [2021-03-11 20:20:44,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:20:44,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 612 transitions. [2021-03-11 20:20:44,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.42857142857143) internal successors, (612), 7 states have internal predecessors, (612), 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 20:20:44,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 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 20:20:44,032 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 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 20:20:44,032 INFO L185 Difference]: Start difference. First operand has 42 places, 19 transitions, 111 flow. Second operand 7 states and 612 transitions. [2021-03-11 20:20:44,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 20 transitions, 133 flow [2021-03-11 20:20:44,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 20 transitions, 104 flow, removed 8 selfloop flow, removed 6 redundant places. [2021-03-11 20:20:44,032 INFO L241 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2021-03-11 20:20:44,033 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2021-03-11 20:20:44,033 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 12 predicate places. [2021-03-11 20:20:44,033 INFO L480 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2021-03-11 20:20:44,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 86.83333333333333) internal successors, (521), 6 states have internal predecessors, (521), 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 20:20:44,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-11 20:20:44,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 08:20:44 BasicIcfg [2021-03-11 20:20:44,036 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 20:20:44,038 INFO L168 Benchmark]: Toolchain (without parser) took 3986.00 ms. Allocated memory was 369.1 MB in the beginning and 444.6 MB in the end (delta: 75.5 MB). Free memory was 332.1 MB in the beginning and 227.7 MB in the end (delta: 104.3 MB). Peak memory consumption was 181.0 MB. Max. memory is 16.0 GB. [2021-03-11 20:20:44,038 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 369.1 MB. Free memory is still 350.2 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 20:20:44,040 INFO L168 Benchmark]: CACSL2BoogieTranslator took 378.91 ms. Allocated memory is still 369.1 MB. Free memory was 331.5 MB in the beginning and 331.0 MB in the end (delta: 520.0 kB). Peak memory consumption was 7.4 MB. Max. memory is 16.0 GB. [2021-03-11 20:20:44,040 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.81 ms. Allocated memory is still 369.1 MB. Free memory was 331.0 MB in the beginning and 328.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:20:44,040 INFO L168 Benchmark]: Boogie Preprocessor took 14.29 ms. Allocated memory is still 369.1 MB. Free memory was 328.9 MB in the beginning and 327.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:20:44,041 INFO L168 Benchmark]: RCFGBuilder took 301.83 ms. Allocated memory is still 369.1 MB. Free memory was 327.8 MB in the beginning and 303.7 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:20:44,041 INFO L168 Benchmark]: TraceAbstraction took 3246.82 ms. Allocated memory was 369.1 MB in the beginning and 444.6 MB in the end (delta: 75.5 MB). Free memory was 302.7 MB in the beginning and 227.7 MB in the end (delta: 74.9 MB). Peak memory consumption was 152.5 MB. Max. memory is 16.0 GB. [2021-03-11 20:20:44,044 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 369.1 MB. Free memory is still 350.2 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 378.91 ms. Allocated memory is still 369.1 MB. Free memory was 331.5 MB in the beginning and 331.0 MB in the end (delta: 520.0 kB). Peak memory consumption was 7.4 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 35.81 ms. Allocated memory is still 369.1 MB. Free memory was 331.0 MB in the beginning and 328.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.29 ms. Allocated memory is still 369.1 MB. Free memory was 328.9 MB in the beginning and 327.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 301.83 ms. Allocated memory is still 369.1 MB. Free memory was 327.8 MB in the beginning and 303.7 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3246.82 ms. Allocated memory was 369.1 MB in the beginning and 444.6 MB in the end (delta: 75.5 MB). Free memory was 302.7 MB in the beginning and 227.7 MB in the end (delta: 74.9 MB). Peak memory consumption was 152.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1995.6ms, 68 PlacesBefore, 27 PlacesAfterwards, 59 TransitionsBefore, 18 TransitionsAfterwards, 864 CoEnabledTransitionPairs, 5 FixpointIterations, 17 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 0 ChoiceCompositions, 46 TotalNumberOfCompositions, 1775 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1005, positive: 924, positive conditional: 0, positive unconditional: 924, negative: 81, negative conditional: 0, negative unconditional: 81, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 631, positive: 584, positive conditional: 0, positive unconditional: 584, negative: 47, negative conditional: 0, negative unconditional: 47, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 631, positive: 570, positive conditional: 0, positive unconditional: 570, negative: 61, negative conditional: 0, negative unconditional: 61, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 61, positive: 14, positive conditional: 0, positive unconditional: 14, negative: 47, negative conditional: 0, negative unconditional: 47, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 241, positive: 60, positive conditional: 0, positive unconditional: 60, negative: 181, negative conditional: 0, negative unconditional: 181, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1005, positive: 340, positive conditional: 0, positive unconditional: 340, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 631, unknown conditional: 0, unknown unconditional: 631] , Statistics on independence cache: Total cache size (in pairs): 83, Positive cache size: 71, Positive conditional cache size: 0, Positive unconditional cache size: 71, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12 - 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 4 procedures, 73 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 3121.2ms, OverallIterations: 10, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 374.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2090.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 49 SDtfs, 27 SDslu, 21 SDs, 0 SdLazy, 121 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 81.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 93.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=222occurred in iteration=5, InterpolantAutomatonStates: 44, 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: 15.3ms SsaConstructionTime, 130.4ms SatisfiabilityAnalysisTime, 357.1ms InterpolantComputationTime, 112 NumberOfCodeBlocks, 112 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 102 ConstructedInterpolants, 0 QuantifiedInterpolants, 420 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...