/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/safe001_tso.oepc.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 20:19:30,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 20:19:30,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 20:19:30,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 20:19:30,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 20:19:30,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 20:19:30,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 20:19:30,543 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 20:19:30,545 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 20:19:30,549 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 20:19:30,550 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 20:19:30,551 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 20:19:30,551 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 20:19:30,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 20:19:30,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 20:19:30,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 20:19:30,557 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 20:19:30,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 20:19:30,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 20:19:30,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 20:19:30,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 20:19:30,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 20:19:30,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 20:19:30,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 20:19:30,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 20:19:30,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 20:19:30,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 20:19:30,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 20:19:30,583 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 20:19:30,615 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 20:19:30,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 20:19:30,619 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 20:19:30,619 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 20:19:30,619 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 20:19:30,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 20:19:30,619 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 20:19:30,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 20:19:30,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 20:19:30,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 20:19:30,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 20:19:30,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 20:19:30,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 20:19:30,621 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 20:19:30,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 20:19:30,621 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 20:19:30,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 20:19:30,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 20:19:30,621 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 20:19:30,621 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 20:19:30,621 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 20:19:30,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 20:19:30,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 20:19:30,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 20:19:30,622 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 20:19:30,622 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 20:19:30,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 20:19:30,622 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 20:19:30,622 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 20:19:30,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 20:19:30,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 20:19:30,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 20:19:30,871 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-11 20:19:30,871 INFO L275 PluginConnector]: CDTParser initialized [2021-03-11 20:19:30,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe001_tso.oepc.i [2021-03-11 20:19:30,923 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cb127f71/b4077de6a7564c50a9432b8c6749f6bf/FLAG9aeb5bf06 [2021-03-11 20:19:31,349 INFO L306 CDTParser]: Found 1 translation units. [2021-03-11 20:19:31,349 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe001_tso.oepc.i [2021-03-11 20:19:31,361 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cb127f71/b4077de6a7564c50a9432b8c6749f6bf/FLAG9aeb5bf06 [2021-03-11 20:19:31,376 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cb127f71/b4077de6a7564c50a9432b8c6749f6bf [2021-03-11 20:19:31,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 20:19:31,387 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-11 20:19:31,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-11 20:19:31,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-11 20:19:31,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-11 20:19:31,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 08:19:31" (1/1) ... [2021-03-11 20:19:31,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36be1050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:19:31, skipping insertion in model container [2021-03-11 20:19:31,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 08:19:31" (1/1) ... [2021-03-11 20:19:31,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-11 20:19:31,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-11 20:19:31,541 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/safe001_tso.oepc.i[950,963] [2021-03-11 20:19:31,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 20:19:31,655 INFO L203 MainTranslator]: Completed pre-run [2021-03-11 20:19:31,665 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/safe001_tso.oepc.i[950,963] [2021-03-11 20:19:31,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 20:19:31,737 INFO L208 MainTranslator]: Completed translation [2021-03-11 20:19:31,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:19:31 WrapperNode [2021-03-11 20:19:31,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-11 20:19:31,739 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 20:19:31,739 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 20:19:31,740 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 20:19:31,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:19:31" (1/1) ... [2021-03-11 20:19:31,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:19:31" (1/1) ... [2021-03-11 20:19:31,784 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 20:19:31,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 20:19:31,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 20:19:31,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 20:19:31,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:19:31" (1/1) ... [2021-03-11 20:19:31,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:19:31" (1/1) ... [2021-03-11 20:19:31,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:19:31" (1/1) ... [2021-03-11 20:19:31,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:19:31" (1/1) ... [2021-03-11 20:19:31,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:19:31" (1/1) ... [2021-03-11 20:19:31,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:19:31" (1/1) ... [2021-03-11 20:19:31,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:19:31" (1/1) ... [2021-03-11 20:19:31,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 20:19:31,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 20:19:31,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 20:19:31,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 20:19:31,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:19:31" (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 20:19:31,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-11 20:19:31,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-11 20:19:31,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-11 20:19:31,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-11 20:19:31,864 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-03-11 20:19:31,864 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-03-11 20:19:31,864 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-03-11 20:19:31,864 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-03-11 20:19:31,864 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-03-11 20:19:31,864 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-03-11 20:19:31,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-11 20:19:31,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-11 20:19:31,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 20:19:31,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 20:19:31,866 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 20:19:32,154 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 20:19:32,154 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-03-11 20:19:32,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 08:19:32 BoogieIcfgContainer [2021-03-11 20:19:32,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 20:19:32,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 20:19:32,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 20:19:32,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 20:19:32,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.03 08:19:31" (1/3) ... [2021-03-11 20:19:32,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2474f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 08:19:32, skipping insertion in model container [2021-03-11 20:19:32,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:19:31" (2/3) ... [2021-03-11 20:19:32,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2474f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 08:19:32, skipping insertion in model container [2021-03-11 20:19:32,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 08:19:32" (3/3) ... [2021-03-11 20:19:32,161 INFO L111 eAbstractionObserver]: Analyzing ICFG safe001_tso.oepc.i [2021-03-11 20:19:32,165 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 20:19:32,168 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 20:19:32,169 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 20:19:32,197 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,197 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,197 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,198 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,198 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,198 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,198 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,198 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,199 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,199 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,199 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,199 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,200 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,200 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,200 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,200 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,200 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,200 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,200 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,200 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,200 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,201 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,201 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,201 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,202 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,203 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,203 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,203 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,204 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,204 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,204 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,204 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,204 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,204 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,204 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,205 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,207 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,207 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,207 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,208 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,212 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,213 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,213 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,213 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,217 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,218 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,218 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,218 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:19:32,220 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 20:19:32,233 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 20:19:32,258 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 20:19:32,258 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 20:19:32,258 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 20:19:32,258 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 20:19:32,258 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 20:19:32,259 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 20:19:32,259 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 20:19:32,259 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 20:19:32,269 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 74 transitions, 163 flow [2021-03-11 20:19:32,326 INFO L129 PetriNetUnfolder]: 2/71 cut-off events. [2021-03-11 20:19:32,326 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:19:32,333 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 20:19:32,333 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 74 transitions, 163 flow [2021-03-11 20:19:32,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 59 transitions, 127 flow [2021-03-11 20:19:32,346 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 20:19:32,352 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 59 transitions, 127 flow [2021-03-11 20:19:32,354 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 59 transitions, 127 flow [2021-03-11 20:19:32,354 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 68 places, 59 transitions, 127 flow [2021-03-11 20:19:32,362 INFO L129 PetriNetUnfolder]: 1/59 cut-off events. [2021-03-11 20:19:32,362 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:19:32,366 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 20:19:32,367 INFO L116 LiptonReduction]: Number of co-enabled transitions 864 [2021-03-11 20:19:34,022 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-03-11 20:19:34,216 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-03-11 20:19:34,299 INFO L131 LiptonReduction]: Checked pairs total: 1775 [2021-03-11 20:19:34,299 INFO L133 LiptonReduction]: Total number of compositions: 46 [2021-03-11 20:19:34,300 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1956 [2021-03-11 20:19:34,306 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-11 20:19:34,307 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:19:34,307 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:19:34,307 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:19:34,308 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:19:34,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:19:34,311 INFO L82 PathProgramCache]: Analyzing trace with hash 2056446484, now seen corresponding path program 1 times [2021-03-11 20:19:34,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:19:34,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848280494] [2021-03-11 20:19:34,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:19:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:19:34,423 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:19:34,424 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:19:34,424 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 20:19:34,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848280494] [2021-03-11 20:19:34,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:19:34,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:19:34,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132443386] [2021-03-11 20:19:34,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-03-11 20:19:34,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:19:34,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-03-11 20:19:34,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-03-11 20:19:34,441 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 120 [2021-03-11 20:19:34,443 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 20:19:34,443 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:19:34,443 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 120 [2021-03-11 20:19:34,444 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:19:34,449 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-11 20:19:34,449 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:19:34,449 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 20:19:34,450 INFO L132 encePairwiseOnDemand]: 119/120 looper letters, 0 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2021-03-11 20:19:34,450 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 17 transitions, 43 flow [2021-03-11 20:19:34,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-03-11 20:19:34,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-03-11 20:19:34,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 227 transitions. [2021-03-11 20:19:34,458 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9458333333333333 [2021-03-11 20:19:34,458 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 227 transitions. [2021-03-11 20:19:34,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 227 transitions. [2021-03-11 20:19:34,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:19:34,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 227 transitions. [2021-03-11 20:19:34,463 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 20:19:34,466 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 20:19:34,466 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 20:19:34,467 INFO L185 Difference]: Start difference. First operand has 27 places, 18 transitions, 45 flow. Second operand 2 states and 227 transitions. [2021-03-11 20:19:34,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 17 transitions, 43 flow [2021-03-11 20:19:34,469 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 20:19:34,470 INFO L241 Difference]: Finished difference. Result has 25 places, 17 transitions, 40 flow [2021-03-11 20:19:34,471 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 20:19:34,472 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, -2 predicate places. [2021-03-11 20:19:34,472 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 40 flow [2021-03-11 20:19:34,472 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 20:19:34,472 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:19:34,472 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:19:34,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 20:19:34,472 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:19:34,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:19:34,473 INFO L82 PathProgramCache]: Analyzing trace with hash -674668314, now seen corresponding path program 1 times [2021-03-11 20:19:34,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:19:34,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908659217] [2021-03-11 20:19:34,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:19:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:19:34,534 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-03-11 20:19:34,535 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 20:19:34,543 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 20:19:34,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908659217] [2021-03-11 20:19:34,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:19:34,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:19:34,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175902004] [2021-03-11 20:19:34,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 20:19:34,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:19:34,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 20:19:34,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 20:19:34,546 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 120 [2021-03-11 20:19:34,547 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 20:19:34,547 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:19:34,547 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 120 [2021-03-11 20:19:34,547 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:19:34,584 INFO L129 PetriNetUnfolder]: 88/208 cut-off events. [2021-03-11 20:19:34,584 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:19:34,585 INFO L84 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 208 events. 88/208 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 979 event pairs, 32 based on Foata normal form. 16/215 useless extension candidates. Maximal degree in co-relation 378. Up to 87 conditions per place. [2021-03-11 20:19:34,587 INFO L132 encePairwiseOnDemand]: 112/120 looper letters, 7 selfloop transitions, 7 changer transitions 0/23 dead transitions. [2021-03-11 20:19:34,587 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 23 transitions, 80 flow [2021-03-11 20:19:34,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:19:34,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:19:34,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2021-03-11 20:19:34,596 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7833333333333333 [2021-03-11 20:19:34,596 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 282 transitions. [2021-03-11 20:19:34,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 282 transitions. [2021-03-11 20:19:34,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:19:34,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 282 transitions. [2021-03-11 20:19:34,599 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 20:19:34,601 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 20:19:34,602 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 20:19:34,602 INFO L185 Difference]: Start difference. First operand has 25 places, 17 transitions, 40 flow. Second operand 3 states and 282 transitions. [2021-03-11 20:19:34,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 23 transitions, 80 flow [2021-03-11 20:19:34,603 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 20:19:34,604 INFO L241 Difference]: Finished difference. Result has 29 places, 23 transitions, 94 flow [2021-03-11 20:19:34,604 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 20:19:34,604 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2021-03-11 20:19:34,604 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 94 flow [2021-03-11 20:19:34,605 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 20:19:34,605 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:19:34,605 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:19:34,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 20:19:34,605 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:19:34,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:19:34,606 INFO L82 PathProgramCache]: Analyzing trace with hash 560118217, now seen corresponding path program 1 times [2021-03-11 20:19:34,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:19:34,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155185153] [2021-03-11 20:19:34,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:19:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:19:34,659 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:19:34,660 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:19:34,663 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-03-11 20:19:34,664 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 20:19:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:19:34,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155185153] [2021-03-11 20:19:34,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:19:34,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:19:34,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105127755] [2021-03-11 20:19:34,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:19:34,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:19:34,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:19:34,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:19:34,675 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 120 [2021-03-11 20:19:34,676 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 20:19:34,676 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:19:34,676 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 120 [2021-03-11 20:19:34,676 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:19:34,719 INFO L129 PetriNetUnfolder]: 53/148 cut-off events. [2021-03-11 20:19:34,719 INFO L130 PetriNetUnfolder]: For 39/102 co-relation queries the response was YES. [2021-03-11 20:19:34,720 INFO L84 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 148 events. 53/148 cut-off events. For 39/102 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 642 event pairs, 2 based on Foata normal form. 6/150 useless extension candidates. Maximal degree in co-relation 434. Up to 59 conditions per place. [2021-03-11 20:19:34,721 INFO L132 encePairwiseOnDemand]: 112/120 looper letters, 15 selfloop transitions, 11 changer transitions 0/35 dead transitions. [2021-03-11 20:19:34,721 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 206 flow [2021-03-11 20:19:34,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:19:34,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:19:34,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 377 transitions. [2021-03-11 20:19:34,723 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7854166666666667 [2021-03-11 20:19:34,723 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 377 transitions. [2021-03-11 20:19:34,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 377 transitions. [2021-03-11 20:19:34,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:19:34,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 377 transitions. [2021-03-11 20:19:34,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 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 20:19:34,725 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 20:19:34,725 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 20:19:34,725 INFO L185 Difference]: Start difference. First operand has 29 places, 23 transitions, 94 flow. Second operand 4 states and 377 transitions. [2021-03-11 20:19:34,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 206 flow [2021-03-11 20:19:34,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 180 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 20:19:34,727 INFO L241 Difference]: Finished difference. Result has 33 places, 31 transitions, 170 flow [2021-03-11 20:19:34,728 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=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2021-03-11 20:19:34,728 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2021-03-11 20:19:34,728 INFO L480 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 170 flow [2021-03-11 20:19:34,728 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 20:19:34,728 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:19:34,728 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:19:34,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 20:19:34,729 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:19:34,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:19:34,729 INFO L82 PathProgramCache]: Analyzing trace with hash 183790457, now seen corresponding path program 1 times [2021-03-11 20:19:34,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:19:34,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32081945] [2021-03-11 20:19:34,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:19:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:19:34,756 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:19:34,757 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:19:34,759 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-03-11 20:19:34,760 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 20:19:34,766 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 20:19:34,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32081945] [2021-03-11 20:19:34,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:19:34,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:19:34,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428864153] [2021-03-11 20:19:34,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:19:34,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:19:34,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:19:34,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:19:34,768 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 120 [2021-03-11 20:19:34,769 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 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 20:19:34,769 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:19:34,769 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 120 [2021-03-11 20:19:34,769 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:19:34,789 INFO L129 PetriNetUnfolder]: 48/136 cut-off events. [2021-03-11 20:19:34,789 INFO L130 PetriNetUnfolder]: For 108/179 co-relation queries the response was YES. [2021-03-11 20:19:34,790 INFO L84 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 136 events. 48/136 cut-off events. For 108/179 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 570 event pairs, 5 based on Foata normal form. 11/146 useless extension candidates. Maximal degree in co-relation 470. Up to 52 conditions per place. [2021-03-11 20:19:34,790 INFO L132 encePairwiseOnDemand]: 112/120 looper letters, 18 selfloop transitions, 14 changer transitions 0/41 dead transitions. [2021-03-11 20:19:34,790 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 41 transitions, 302 flow [2021-03-11 20:19:34,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:19:34,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:19:34,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 374 transitions. [2021-03-11 20:19:34,792 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7791666666666667 [2021-03-11 20:19:34,792 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 374 transitions. [2021-03-11 20:19:34,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 374 transitions. [2021-03-11 20:19:34,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:19:34,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 374 transitions. [2021-03-11 20:19:34,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 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 20:19:34,793 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 20:19:34,794 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 20:19:34,794 INFO L185 Difference]: Start difference. First operand has 33 places, 31 transitions, 170 flow. Second operand 4 states and 374 transitions. [2021-03-11 20:19:34,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 41 transitions, 302 flow [2021-03-11 20:19:34,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 302 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-11 20:19:34,796 INFO L241 Difference]: Finished difference. Result has 39 places, 37 transitions, 284 flow [2021-03-11 20:19:34,796 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2021-03-11 20:19:34,796 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 12 predicate places. [2021-03-11 20:19:34,796 INFO L480 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 284 flow [2021-03-11 20:19:34,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 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 20:19:34,797 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:19:34,797 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:19:34,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 20:19:34,797 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:19:34,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:19:34,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1187399506, now seen corresponding path program 1 times [2021-03-11 20:19:34,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:19:34,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829733796] [2021-03-11 20:19:34,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:19:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:19:34,848 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:19:34,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:19:34,850 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:19:34,851 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:19:34,855 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-03-11 20:19:34,857 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 20:19:34,863 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 20:19:34,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829733796] [2021-03-11 20:19:34,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:19:34,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:19:34,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208271552] [2021-03-11 20:19:34,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 20:19:34,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:19:34,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 20:19:34,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 20:19:34,866 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 120 [2021-03-11 20:19:34,867 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 90.0) internal successors, (450), 5 states have internal predecessors, (450), 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 20:19:34,867 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:19:34,867 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 120 [2021-03-11 20:19:34,867 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:19:34,917 INFO L129 PetriNetUnfolder]: 48/155 cut-off events. [2021-03-11 20:19:34,917 INFO L130 PetriNetUnfolder]: For 332/465 co-relation queries the response was YES. [2021-03-11 20:19:34,920 INFO L84 FinitePrefix]: Finished finitePrefix Result has 673 conditions, 155 events. 48/155 cut-off events. For 332/465 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 734 event pairs, 5 based on Foata normal form. 10/163 useless extension candidates. Maximal degree in co-relation 663. Up to 61 conditions per place. [2021-03-11 20:19:34,922 INFO L132 encePairwiseOnDemand]: 112/120 looper letters, 13 selfloop transitions, 12 changer transitions 15/49 dead transitions. [2021-03-11 20:19:34,922 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 450 flow [2021-03-11 20:19:34,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 20:19:34,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 20:19:34,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 470 transitions. [2021-03-11 20:19:34,924 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7833333333333333 [2021-03-11 20:19:34,924 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 470 transitions. [2021-03-11 20:19:34,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 470 transitions. [2021-03-11 20:19:34,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:19:34,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 470 transitions. [2021-03-11 20:19:34,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 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 20:19:34,926 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 20:19:34,926 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 20:19:34,926 INFO L185 Difference]: Start difference. First operand has 39 places, 37 transitions, 284 flow. Second operand 5 states and 470 transitions. [2021-03-11 20:19:34,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 450 flow [2021-03-11 20:19:34,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 20:19:34,933 INFO L241 Difference]: Finished difference. Result has 43 places, 31 transitions, 249 flow [2021-03-11 20:19:34,933 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=43, PETRI_TRANSITIONS=31} [2021-03-11 20:19:34,934 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 16 predicate places. [2021-03-11 20:19:34,934 INFO L480 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 249 flow [2021-03-11 20:19:34,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 90.0) internal successors, (450), 5 states have internal predecessors, (450), 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 20:19:34,934 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:19:34,934 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:19:34,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 20:19:34,934 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:19:34,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:19:34,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1398140507, now seen corresponding path program 1 times [2021-03-11 20:19:34,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:19:34,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321110211] [2021-03-11 20:19:34,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:19:34,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:19:34,974 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:19:34,974 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:19:34,975 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:19:34,975 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:19:34,978 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:19:34,979 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:19:34,981 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 20:19:34,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321110211] [2021-03-11 20:19:34,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:19:34,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:19:34,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047037287] [2021-03-11 20:19:34,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:19:34,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:19:34,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:19:34,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:19:34,990 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 120 [2021-03-11 20:19:34,990 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 249 flow. Second operand has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 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 20:19:34,990 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:19:34,990 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 120 [2021-03-11 20:19:34,990 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:19:35,016 INFO L129 PetriNetUnfolder]: 14/81 cut-off events. [2021-03-11 20:19:35,017 INFO L130 PetriNetUnfolder]: For 239/249 co-relation queries the response was YES. [2021-03-11 20:19:35,017 INFO L84 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 81 events. 14/81 cut-off events. For 239/249 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 323 event pairs, 1 based on Foata normal form. 8/89 useless extension candidates. Maximal degree in co-relation 351. Up to 29 conditions per place. [2021-03-11 20:19:35,017 INFO L132 encePairwiseOnDemand]: 116/120 looper letters, 8 selfloop transitions, 5 changer transitions 6/33 dead transitions. [2021-03-11 20:19:35,017 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 33 transitions, 295 flow [2021-03-11 20:19:35,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 20:19:35,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 20:19:35,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 483 transitions. [2021-03-11 20:19:35,019 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.805 [2021-03-11 20:19:35,019 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 483 transitions. [2021-03-11 20:19:35,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 483 transitions. [2021-03-11 20:19:35,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:19:35,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 483 transitions. [2021-03-11 20:19:35,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.6) internal successors, (483), 5 states have internal predecessors, (483), 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 20:19:35,021 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 20:19:35,021 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 20:19:35,022 INFO L185 Difference]: Start difference. First operand has 43 places, 31 transitions, 249 flow. Second operand 5 states and 483 transitions. [2021-03-11 20:19:35,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 33 transitions, 295 flow [2021-03-11 20:19:35,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 33 transitions, 266 flow, removed 1 selfloop flow, removed 5 redundant places. [2021-03-11 20:19:35,024 INFO L241 Difference]: Finished difference. Result has 44 places, 26 transitions, 183 flow [2021-03-11 20:19:35,025 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=44, PETRI_TRANSITIONS=26} [2021-03-11 20:19:35,025 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2021-03-11 20:19:35,025 INFO L480 AbstractCegarLoop]: Abstraction has has 44 places, 26 transitions, 183 flow [2021-03-11 20:19:35,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 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 20:19:35,025 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:19:35,025 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:19:35,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 20:19:35,025 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:19:35,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:19:35,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1402536342, now seen corresponding path program 2 times [2021-03-11 20:19:35,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:19:35,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898318077] [2021-03-11 20:19:35,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:19:35,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:19:35,065 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:19:35,066 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:19:35,068 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:19:35,068 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:19:35,071 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-03-11 20:19:35,074 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 20:19:35,080 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 20:19:35,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898318077] [2021-03-11 20:19:35,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:19:35,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:19:35,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233604859] [2021-03-11 20:19:35,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 20:19:35,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:19:35,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 20:19:35,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 20:19:35,083 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 120 [2021-03-11 20:19:35,083 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 26 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 90.0) internal successors, (450), 5 states have internal predecessors, (450), 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 20:19:35,083 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:19:35,083 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 120 [2021-03-11 20:19:35,083 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:19:35,104 INFO L129 PetriNetUnfolder]: 6/50 cut-off events. [2021-03-11 20:19:35,105 INFO L130 PetriNetUnfolder]: For 116/123 co-relation queries the response was YES. [2021-03-11 20:19:35,105 INFO L84 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 50 events. 6/50 cut-off events. For 116/123 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 142 event pairs, 0 based on Foata normal form. 5/55 useless extension candidates. Maximal degree in co-relation 207. Up to 20 conditions per place. [2021-03-11 20:19:35,105 INFO L132 encePairwiseOnDemand]: 114/120 looper letters, 3 selfloop transitions, 5 changer transitions 13/30 dead transitions. [2021-03-11 20:19:35,106 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 30 transitions, 260 flow [2021-03-11 20:19:35,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 20:19:35,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 20:19:35,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 461 transitions. [2021-03-11 20:19:35,107 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7683333333333333 [2021-03-11 20:19:35,107 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 461 transitions. [2021-03-11 20:19:35,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 461 transitions. [2021-03-11 20:19:35,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:19:35,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 461 transitions. [2021-03-11 20:19:35,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 92.2) internal successors, (461), 5 states have internal predecessors, (461), 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 20:19:35,108 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 20:19:35,109 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 20:19:35,109 INFO L185 Difference]: Start difference. First operand has 44 places, 26 transitions, 183 flow. Second operand 5 states and 461 transitions. [2021-03-11 20:19:35,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 30 transitions, 260 flow [2021-03-11 20:19:35,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 222 flow, removed 3 selfloop flow, removed 6 redundant places. [2021-03-11 20:19:35,111 INFO L241 Difference]: Finished difference. Result has 41 places, 17 transitions, 101 flow [2021-03-11 20:19:35,111 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=152, 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=5, PETRI_FLOW=101, PETRI_PLACES=41, PETRI_TRANSITIONS=17} [2021-03-11 20:19:35,111 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 14 predicate places. [2021-03-11 20:19:35,111 INFO L480 AbstractCegarLoop]: Abstraction has has 41 places, 17 transitions, 101 flow [2021-03-11 20:19:35,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 90.0) internal successors, (450), 5 states have internal predecessors, (450), 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 20:19:35,111 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:19:35,111 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:19:35,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-11 20:19:35,111 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:19:35,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:19:35,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1175094302, now seen corresponding path program 1 times [2021-03-11 20:19:35,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:19:35,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134210681] [2021-03-11 20:19:35,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:19:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:19:35,166 INFO L142 QuantifierPusher]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 20:19:35,167 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-03-11 20:19:35,169 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:19:35,169 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:19:35,172 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 20:19:35,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134210681] [2021-03-11 20:19:35,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:19:35,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:19:35,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903026958] [2021-03-11 20:19:35,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:19:35,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:19:35,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:19:35,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:19:35,174 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 120 [2021-03-11 20:19:35,174 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 17 transitions, 101 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 20:19:35,174 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:19:35,174 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 120 [2021-03-11 20:19:35,174 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:19:35,197 INFO L129 PetriNetUnfolder]: 23/66 cut-off events. [2021-03-11 20:19:35,197 INFO L130 PetriNetUnfolder]: For 101/113 co-relation queries the response was YES. [2021-03-11 20:19:35,197 INFO L84 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 66 events. 23/66 cut-off events. For 101/113 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 196 event pairs, 9 based on Foata normal form. 5/65 useless extension candidates. Maximal degree in co-relation 174. Up to 39 conditions per place. [2021-03-11 20:19:35,198 INFO L132 encePairwiseOnDemand]: 114/120 looper letters, 5 selfloop transitions, 3 changer transitions 8/27 dead transitions. [2021-03-11 20:19:35,198 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 27 transitions, 153 flow [2021-03-11 20:19:35,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 20:19:35,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 20:19:35,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 448 transitions. [2021-03-11 20:19:35,199 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7466666666666667 [2021-03-11 20:19:35,199 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 448 transitions. [2021-03-11 20:19:35,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 448 transitions. [2021-03-11 20:19:35,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:19:35,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 448 transitions. [2021-03-11 20:19:35,201 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 20:19:35,202 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 20:19:35,202 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 20:19:35,203 INFO L185 Difference]: Start difference. First operand has 41 places, 17 transitions, 101 flow. Second operand 5 states and 448 transitions. [2021-03-11 20:19:35,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 27 transitions, 153 flow [2021-03-11 20:19:35,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 27 transitions, 108 flow, removed 7 selfloop flow, removed 12 redundant places. [2021-03-11 20:19:35,204 INFO L241 Difference]: Finished difference. Result has 36 places, 19 transitions, 87 flow [2021-03-11 20:19:35,204 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=29, 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=87, PETRI_PLACES=36, PETRI_TRANSITIONS=19} [2021-03-11 20:19:35,204 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 9 predicate places. [2021-03-11 20:19:35,204 INFO L480 AbstractCegarLoop]: Abstraction has has 36 places, 19 transitions, 87 flow [2021-03-11 20:19:35,205 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 20:19:35,205 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:19:35,205 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:19:35,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-11 20:19:35,205 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:19:35,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:19:35,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2068175754, now seen corresponding path program 1 times [2021-03-11 20:19:35,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:19:35,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515387484] [2021-03-11 20:19:35,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:19:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:19:35,240 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:19:35,240 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:19:35,243 INFO L142 QuantifierPusher]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 20:19:35,243 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-03-11 20:19:35,246 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:19:35,246 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:19:35,249 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 20:19:35,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515387484] [2021-03-11 20:19:35,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:19:35,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:19:35,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813870148] [2021-03-11 20:19:35,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 20:19:35,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:19:35,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 20:19:35,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 20:19:35,252 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 120 [2021-03-11 20:19:35,252 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 19 transitions, 87 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 20:19:35,253 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:19:35,253 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 120 [2021-03-11 20:19:35,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:19:35,283 INFO L129 PetriNetUnfolder]: 9/40 cut-off events. [2021-03-11 20:19:35,283 INFO L130 PetriNetUnfolder]: For 63/105 co-relation queries the response was YES. [2021-03-11 20:19:35,283 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 40 events. 9/40 cut-off events. For 63/105 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 85 event pairs, 1 based on Foata normal form. 9/47 useless extension candidates. Maximal degree in co-relation 132. Up to 27 conditions per place. [2021-03-11 20:19:35,283 INFO L132 encePairwiseOnDemand]: 114/120 looper letters, 3 selfloop transitions, 5 changer transitions 10/29 dead transitions. [2021-03-11 20:19:35,284 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 29 transitions, 181 flow [2021-03-11 20:19:35,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 20:19:35,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 20:19:35,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 536 transitions. [2021-03-11 20:19:35,285 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7444444444444445 [2021-03-11 20:19:35,285 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 536 transitions. [2021-03-11 20:19:35,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 536 transitions. [2021-03-11 20:19:35,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:19:35,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 536 transitions. [2021-03-11 20:19:35,286 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 20:19:35,287 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 20:19:35,287 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 20:19:35,288 INFO L185 Difference]: Start difference. First operand has 36 places, 19 transitions, 87 flow. Second operand 6 states and 536 transitions. [2021-03-11 20:19:35,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 29 transitions, 181 flow [2021-03-11 20:19:35,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 29 transitions, 176 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-11 20:19:35,290 INFO L241 Difference]: Finished difference. Result has 40 places, 19 transitions, 106 flow [2021-03-11 20:19:35,290 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=32, 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=106, PETRI_PLACES=40, PETRI_TRANSITIONS=19} [2021-03-11 20:19:35,290 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 13 predicate places. [2021-03-11 20:19:35,290 INFO L480 AbstractCegarLoop]: Abstraction has has 40 places, 19 transitions, 106 flow [2021-03-11 20:19:35,290 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 20:19:35,291 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:19:35,291 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:19:35,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-11 20:19:35,291 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:19:35,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:19:35,291 INFO L82 PathProgramCache]: Analyzing trace with hash -311075111, now seen corresponding path program 1 times [2021-03-11 20:19:35,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:19:35,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180316124] [2021-03-11 20:19:35,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:19:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:19:35,327 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:19:35,327 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:19:35,329 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:19:35,329 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:19:35,332 INFO L142 QuantifierPusher]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 20:19:35,333 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-03-11 20:19:35,341 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:19:35,341 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:19:35,345 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 20:19:35,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180316124] [2021-03-11 20:19:35,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:19:35,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 20:19:35,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385885885] [2021-03-11 20:19:35,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 20:19:35,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:19:35,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 20:19:35,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 20:19:35,352 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 120 [2021-03-11 20:19:35,352 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 19 transitions, 106 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 20:19:35,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:19:35,353 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 120 [2021-03-11 20:19:35,353 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:19:35,373 INFO L129 PetriNetUnfolder]: 1/20 cut-off events. [2021-03-11 20:19:35,373 INFO L130 PetriNetUnfolder]: For 54/70 co-relation queries the response was YES. [2021-03-11 20:19:35,374 INFO L84 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 20 events. 1/20 cut-off events. For 54/70 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 67. Up to 9 conditions per place. [2021-03-11 20:19:35,374 INFO L132 encePairwiseOnDemand]: 114/120 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2021-03-11 20:19:35,374 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 20 transitions, 128 flow [2021-03-11 20:19:35,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 20:19:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-11 20:19:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 612 transitions. [2021-03-11 20:19:35,375 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7285714285714285 [2021-03-11 20:19:35,375 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 612 transitions. [2021-03-11 20:19:35,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 612 transitions. [2021-03-11 20:19:35,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:19:35,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 612 transitions. [2021-03-11 20:19:35,377 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 20:19:35,378 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 20:19:35,378 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 20:19:35,378 INFO L185 Difference]: Start difference. First operand has 40 places, 19 transitions, 106 flow. Second operand 7 states and 612 transitions. [2021-03-11 20:19:35,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 20 transitions, 128 flow [2021-03-11 20:19:35,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 20 transitions, 104 flow, removed 8 selfloop flow, removed 5 redundant places. [2021-03-11 20:19:35,380 INFO L241 Difference]: Finished difference. Result has 38 places, 0 transitions, 0 flow [2021-03-11 20:19:35,380 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=32, 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=38, PETRI_TRANSITIONS=0} [2021-03-11 20:19:35,380 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 11 predicate places. [2021-03-11 20:19:35,380 INFO L480 AbstractCegarLoop]: Abstraction has has 38 places, 0 transitions, 0 flow [2021-03-11 20:19:35,381 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 20:19:35,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-11 20:19:35,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 08:19:35 BasicIcfg [2021-03-11 20:19:35,383 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 20:19:35,384 INFO L168 Benchmark]: Toolchain (without parser) took 4005.14 ms. Allocated memory was 255.9 MB in the beginning and 436.2 MB in the end (delta: 180.4 MB). Free memory was 234.7 MB in the beginning and 212.4 MB in the end (delta: 22.2 MB). Peak memory consumption was 201.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:19:35,384 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 20:19:35,386 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.10 ms. Allocated memory was 255.9 MB in the beginning and 362.8 MB in the end (delta: 107.0 MB). Free memory was 234.1 MB in the beginning and 324.9 MB in the end (delta: -90.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-03-11 20:19:35,386 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.66 ms. Allocated memory is still 362.8 MB. Free memory was 324.9 MB in the beginning and 322.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:19:35,387 INFO L168 Benchmark]: Boogie Preprocessor took 28.13 ms. Allocated memory is still 362.8 MB. Free memory was 322.8 MB in the beginning and 321.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:19:35,388 INFO L168 Benchmark]: RCFGBuilder took 342.68 ms. Allocated memory is still 362.8 MB. Free memory was 321.4 MB in the beginning and 299.0 MB in the end (delta: 22.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:19:35,388 INFO L168 Benchmark]: TraceAbstraction took 3226.49 ms. Allocated memory was 362.8 MB in the beginning and 436.2 MB in the end (delta: 73.4 MB). Free memory was 298.4 MB in the beginning and 212.4 MB in the end (delta: 85.9 MB). Peak memory consumption was 160.7 MB. Max. memory is 16.0 GB. [2021-03-11 20:19:35,390 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 350.10 ms. Allocated memory was 255.9 MB in the beginning and 362.8 MB in the end (delta: 107.0 MB). Free memory was 234.1 MB in the beginning and 324.9 MB in the end (delta: -90.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 44.66 ms. Allocated memory is still 362.8 MB. Free memory was 324.9 MB in the beginning and 322.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 28.13 ms. Allocated memory is still 362.8 MB. Free memory was 322.8 MB in the beginning and 321.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 342.68 ms. Allocated memory is still 362.8 MB. Free memory was 321.4 MB in the beginning and 299.0 MB in the end (delta: 22.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3226.49 ms. Allocated memory was 362.8 MB in the beginning and 436.2 MB in the end (delta: 73.4 MB). Free memory was 298.4 MB in the beginning and 212.4 MB in the end (delta: 85.9 MB). Peak memory consumption was 160.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1945.1ms, 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: 990, positive: 909, positive conditional: 0, positive unconditional: 909, 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: 628, positive: 582, positive conditional: 0, positive unconditional: 582, negative: 46, negative conditional: 0, negative unconditional: 46, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 628, positive: 568, positive conditional: 0, positive unconditional: 568, negative: 60, negative conditional: 0, negative unconditional: 60, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 60, positive: 14, positive conditional: 0, positive unconditional: 14, negative: 46, negative conditional: 0, negative unconditional: 46, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 216, positive: 56, positive conditional: 0, positive unconditional: 56, negative: 160, negative conditional: 0, negative unconditional: 160, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 990, positive: 327, positive conditional: 0, positive unconditional: 327, negative: 35, negative conditional: 0, negative unconditional: 35, unknown: 628, unknown conditional: 0, unknown unconditional: 628] , Statistics on independence cache: Total cache size (in pairs): 79, Positive cache size: 68, Positive conditional cache size: 0, Positive unconditional cache size: 68, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11 - 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: 2.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 3130.3ms, OverallIterations: 10, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 412.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2045.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 58 SDtfs, 40 SDslu, 40 SDs, 0 SdLazy, 147 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 96.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 94.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=284occurred in iteration=4, InterpolantAutomatonStates: 46, 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: 17.2ms SsaConstructionTime, 130.6ms SatisfiabilityAnalysisTime, 365.9ms InterpolantComputationTime, 109 NumberOfCodeBlocks, 109 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 99 ConstructedInterpolants, 0 QuantifiedInterpolants, 456 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...