./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:31:21,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:31:21,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:31:22,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:31:22,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:31:22,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:31:22,047 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:31:22,052 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:31:22,055 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:31:22,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:31:22,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:31:22,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:31:22,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:31:22,067 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:31:22,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:31:22,077 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:31:22,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:31:22,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:31:22,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:31:22,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:31:22,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:31:22,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:31:22,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:31:22,105 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:31:22,115 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:31:22,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:31:22,116 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:31:22,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:31:22,119 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:31:22,121 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:31:22,121 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:31:22,122 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:31:22,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:31:22,126 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:31:22,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:31:22,128 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:31:22,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:31:22,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:31:22,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:31:22,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:31:22,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:31:22,133 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:31:22,186 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:31:22,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:31:22,187 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:31:22,188 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:31:22,197 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:31:22,197 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:31:22,197 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:31:22,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:31:22,198 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:31:22,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:31:22,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:31:22,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:31:22,200 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:31:22,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:31:22,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:31:22,201 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:31:22,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:31:22,201 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:31:22,202 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:31:22,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:31:22,202 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:31:22,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:31:22,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:31:22,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:31:22,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:31:22,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:31:22,204 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:31:22,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:31:22,204 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:31:22,206 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:31:22,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:31:22,207 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:31:22,207 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c [2021-11-09 08:31:22,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:31:22,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:31:22,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:31:22,642 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:31:22,643 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:31:22,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2021-11-09 08:31:22,732 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/data/2c4a7ce26/9238dac265d64d9b926338c81c069947/FLAG9be51e937 [2021-11-09 08:31:23,421 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:31:23,421 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2021-11-09 08:31:23,439 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/data/2c4a7ce26/9238dac265d64d9b926338c81c069947/FLAG9be51e937 [2021-11-09 08:31:23,743 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/data/2c4a7ce26/9238dac265d64d9b926338c81c069947 [2021-11-09 08:31:23,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:31:23,748 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:31:23,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:31:23,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:31:23,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:31:23,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:31:23" (1/1) ... [2021-11-09 08:31:23,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e4a5c68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:23, skipping insertion in model container [2021-11-09 08:31:23,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:31:23" (1/1) ... [2021-11-09 08:31:23,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:31:23,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:31:24,078 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2021-11-09 08:31:24,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:31:24,113 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:31:24,163 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2021-11-09 08:31:24,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:31:24,203 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:31:24,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:24 WrapperNode [2021-11-09 08:31:24,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:31:24,206 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:31:24,207 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:31:24,207 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:31:24,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:24" (1/1) ... [2021-11-09 08:31:24,239 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:24" (1/1) ... [2021-11-09 08:31:24,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:31:24,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:31:24,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:31:24,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:31:24,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:24" (1/1) ... [2021-11-09 08:31:24,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:24" (1/1) ... [2021-11-09 08:31:24,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:24" (1/1) ... [2021-11-09 08:31:24,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:24" (1/1) ... [2021-11-09 08:31:24,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:24" (1/1) ... [2021-11-09 08:31:24,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:24" (1/1) ... [2021-11-09 08:31:24,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:24" (1/1) ... [2021-11-09 08:31:24,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:31:24,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:31:24,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:31:24,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:31:24,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:24" (1/1) ... [2021-11-09 08:31:24,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:31:24,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:24,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:31:24,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:31:24,462 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-09 08:31:24,462 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-09 08:31:24,463 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-09 08:31:24,463 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-09 08:31:24,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:31:24,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:31:24,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 08:31:24,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-09 08:31:24,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-09 08:31:24,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 08:31:24,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:31:24,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:31:24,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 08:31:24,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:31:24,468 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-09 08:31:25,232 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:31:25,232 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2021-11-09 08:31:25,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:31:25 BoogieIcfgContainer [2021-11-09 08:31:25,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:31:25,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:31:25,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:31:25,245 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:31:25,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:31:23" (1/3) ... [2021-11-09 08:31:25,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3dc3b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:31:25, skipping insertion in model container [2021-11-09 08:31:25,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:24" (2/3) ... [2021-11-09 08:31:25,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3dc3b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:31:25, skipping insertion in model container [2021-11-09 08:31:25,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:31:25" (3/3) ... [2021-11-09 08:31:25,250 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2021-11-09 08:31:25,259 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-09 08:31:25,259 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:31:25,259 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:31:25,260 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-09 08:31:25,314 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,314 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,314 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,315 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,315 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,315 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,316 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,316 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,316 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,316 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,317 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,317 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,318 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,318 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,318 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,318 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,319 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,319 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,319 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,319 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,320 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,320 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,320 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,320 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,321 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,322 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,322 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,322 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,323 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,324 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,324 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,324 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,325 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,325 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,326 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,326 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,326 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~flag~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,327 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~flag~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,327 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,327 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,328 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,328 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,328 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,328 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,329 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,329 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,329 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,330 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,330 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,331 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,331 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,332 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,332 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,333 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,333 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~flag~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,333 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~flag~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,333 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~flag~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,334 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~flag~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,334 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,334 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,335 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,335 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,336 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,336 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,336 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,337 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,338 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,338 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,338 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,339 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,339 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,339 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,340 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,340 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,341 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~flag~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,341 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~flag~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,343 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~flag~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,343 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~flag~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,352 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,352 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,353 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,353 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,353 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,353 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,354 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,356 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~flag~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,358 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,361 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,362 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,363 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,363 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,364 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,365 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,365 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,365 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:31:25,373 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-09 08:31:25,439 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:31:25,447 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 08:31:25,448 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-09 08:31:25,464 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 124 places, 128 transitions, 272 flow [2021-11-09 08:31:25,551 INFO L129 PetriNetUnfolder]: 11/126 cut-off events. [2021-11-09 08:31:25,551 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-09 08:31:25,556 INFO L84 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 126 events. 11/126 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 119 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2021-11-09 08:31:25,557 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 128 transitions, 272 flow [2021-11-09 08:31:25,564 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 118 transitions, 248 flow [2021-11-09 08:31:25,600 INFO L129 PetriNetUnfolder]: 11/117 cut-off events. [2021-11-09 08:31:25,600 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-09 08:31:25,601 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:31:25,601 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:25,602 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:31:25,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:25,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1160131341, now seen corresponding path program 1 times [2021-11-09 08:31:25,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:25,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973582196] [2021-11-09 08:31:25,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:25,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:25,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:25,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:25,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:25,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973582196] [2021-11-09 08:31:25,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973582196] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:25,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:25,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:31:25,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094967152] [2021-11-09 08:31:25,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 08:31:25,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:26,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 08:31:26,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:31:26,012 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 128 [2021-11-09 08:31:26,018 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 118 transitions, 248 flow. Second operand has 2 states, 2 states have (on average 121.0) internal successors, (242), 2 states have internal predecessors, (242), 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) [2021-11-09 08:31:26,019 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:31:26,019 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 128 [2021-11-09 08:31:26,021 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:31:26,093 INFO L129 PetriNetUnfolder]: 4/111 cut-off events. [2021-11-09 08:31:26,093 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-09 08:31:26,095 INFO L84 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 111 events. 4/111 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 115 event pairs, 0 based on Foata normal form. 7/110 useless extension candidates. Maximal degree in co-relation 117. Up to 2 conditions per place. [2021-11-09 08:31:26,097 INFO L132 encePairwiseOnDemand]: 121/128 looper letters, 0 selfloop transitions, 0 changer transitions 3/111 dead transitions. [2021-11-09 08:31:26,097 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 111 transitions, 234 flow [2021-11-09 08:31:26,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 08:31:26,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-09 08:31:26,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 247 transitions. [2021-11-09 08:31:26,117 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.96484375 [2021-11-09 08:31:26,118 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 247 transitions. [2021-11-09 08:31:26,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 247 transitions. [2021-11-09 08:31:26,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:31:26,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 247 transitions. [2021-11-09 08:31:26,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 123.5) internal successors, (247), 2 states have internal predecessors, (247), 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) [2021-11-09 08:31:26,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 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) [2021-11-09 08:31:26,137 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 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) [2021-11-09 08:31:26,140 INFO L186 Difference]: Start difference. First operand has 114 places, 118 transitions, 248 flow. Second operand 2 states and 247 transitions. [2021-11-09 08:31:26,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 111 transitions, 234 flow [2021-11-09 08:31:26,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 111 transitions, 226 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-09 08:31:26,150 INFO L242 Difference]: Finished difference. Result has 111 places, 108 transitions, 220 flow [2021-11-09 08:31:26,152 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=220, PETRI_PLACES=111, PETRI_TRANSITIONS=108} [2021-11-09 08:31:26,153 INFO L334 CegarLoopForPetriNet]: 114 programPoint places, -3 predicate places. [2021-11-09 08:31:26,154 INFO L470 AbstractCegarLoop]: Abstraction has has 111 places, 108 transitions, 220 flow [2021-11-09 08:31:26,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 121.0) internal successors, (242), 2 states have internal predecessors, (242), 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) [2021-11-09 08:31:26,155 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:31:26,155 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:26,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:31:26,156 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:31:26,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:26,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1306820418, now seen corresponding path program 1 times [2021-11-09 08:31:26,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:26,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747060607] [2021-11-09 08:31:26,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:26,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:26,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:26,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:26,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:26,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747060607] [2021-11-09 08:31:26,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747060607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:26,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:26,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:31:26,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288302991] [2021-11-09 08:31:26,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:31:26,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:26,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:31:26,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:31:26,533 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 128 [2021-11-09 08:31:26,534 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 108 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 105.6) internal successors, (528), 5 states have internal predecessors, (528), 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) [2021-11-09 08:31:26,534 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:31:26,535 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 128 [2021-11-09 08:31:26,535 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:31:26,689 INFO L129 PetriNetUnfolder]: 4/132 cut-off events. [2021-11-09 08:31:26,689 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-09 08:31:26,690 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 132 events. 4/132 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 158 event pairs, 0 based on Foata normal form. 1/126 useless extension candidates. Maximal degree in co-relation 152. Up to 9 conditions per place. [2021-11-09 08:31:26,691 INFO L132 encePairwiseOnDemand]: 123/128 looper letters, 13 selfloop transitions, 2 changer transitions 3/112 dead transitions. [2021-11-09 08:31:26,691 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 112 transitions, 264 flow [2021-11-09 08:31:26,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:31:26,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-09 08:31:26,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 534 transitions. [2021-11-09 08:31:26,704 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.834375 [2021-11-09 08:31:26,704 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 534 transitions. [2021-11-09 08:31:26,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 534 transitions. [2021-11-09 08:31:26,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:31:26,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 534 transitions. [2021-11-09 08:31:26,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.8) internal successors, (534), 5 states have internal predecessors, (534), 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) [2021-11-09 08:31:26,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 128.0) internal successors, (768), 6 states have internal predecessors, (768), 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) [2021-11-09 08:31:26,717 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 128.0) internal successors, (768), 6 states have internal predecessors, (768), 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) [2021-11-09 08:31:26,717 INFO L186 Difference]: Start difference. First operand has 111 places, 108 transitions, 220 flow. Second operand 5 states and 534 transitions. [2021-11-09 08:31:26,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 112 transitions, 264 flow [2021-11-09 08:31:26,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 112 transitions, 264 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-09 08:31:26,725 INFO L242 Difference]: Finished difference. Result has 115 places, 109 transitions, 236 flow [2021-11-09 08:31:26,726 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=236, PETRI_PLACES=115, PETRI_TRANSITIONS=109} [2021-11-09 08:31:26,727 INFO L334 CegarLoopForPetriNet]: 114 programPoint places, 1 predicate places. [2021-11-09 08:31:26,727 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 109 transitions, 236 flow [2021-11-09 08:31:26,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.6) internal successors, (528), 5 states have internal predecessors, (528), 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) [2021-11-09 08:31:26,728 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:31:26,729 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:26,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:31:26,729 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:31:26,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:26,735 INFO L85 PathProgramCache]: Analyzing trace with hash 816739227, now seen corresponding path program 1 times [2021-11-09 08:31:26,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:26,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442579243] [2021-11-09 08:31:26,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:26,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:26,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:27,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:27,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442579243] [2021-11-09 08:31:27,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442579243] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:27,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:27,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:31:27,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258185189] [2021-11-09 08:31:27,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:31:27,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:27,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:31:27,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:31:27,076 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 128 [2021-11-09 08:31:27,077 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 109 transitions, 236 flow. Second operand has 4 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 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) [2021-11-09 08:31:27,077 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:31:27,077 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 128 [2021-11-09 08:31:27,078 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:31:27,289 INFO L129 PetriNetUnfolder]: 88/372 cut-off events. [2021-11-09 08:31:27,289 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-11-09 08:31:27,294 INFO L84 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 372 events. 88/372 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1342 event pairs, 39 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 549. Up to 141 conditions per place. [2021-11-09 08:31:27,297 INFO L132 encePairwiseOnDemand]: 123/128 looper letters, 23 selfloop transitions, 6 changer transitions 1/121 dead transitions. [2021-11-09 08:31:27,298 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 121 transitions, 320 flow [2021-11-09 08:31:27,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:31:27,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-11-09 08:31:27,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 439 transitions. [2021-11-09 08:31:27,301 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.857421875 [2021-11-09 08:31:27,301 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 439 transitions. [2021-11-09 08:31:27,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 439 transitions. [2021-11-09 08:31:27,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:31:27,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 439 transitions. [2021-11-09 08:31:27,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 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) [2021-11-09 08:31:27,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 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) [2021-11-09 08:31:27,307 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 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) [2021-11-09 08:31:27,307 INFO L186 Difference]: Start difference. First operand has 115 places, 109 transitions, 236 flow. Second operand 4 states and 439 transitions. [2021-11-09 08:31:27,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 121 transitions, 320 flow [2021-11-09 08:31:27,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 121 transitions, 314 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-11-09 08:31:27,317 INFO L242 Difference]: Finished difference. Result has 115 places, 114 transitions, 267 flow [2021-11-09 08:31:27,318 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=267, PETRI_PLACES=115, PETRI_TRANSITIONS=114} [2021-11-09 08:31:27,318 INFO L334 CegarLoopForPetriNet]: 114 programPoint places, 1 predicate places. [2021-11-09 08:31:27,318 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 114 transitions, 267 flow [2021-11-09 08:31:27,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 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) [2021-11-09 08:31:27,319 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:31:27,320 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:27,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:31:27,320 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:31:27,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:27,321 INFO L85 PathProgramCache]: Analyzing trace with hash -675892968, now seen corresponding path program 1 times [2021-11-09 08:31:27,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:27,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035742693] [2021-11-09 08:31:27,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:27,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:27,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:27,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035742693] [2021-11-09 08:31:27,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035742693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:27,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:27,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:31:27,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852303919] [2021-11-09 08:31:27,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:31:27,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:27,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:31:27,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:31:27,520 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 128 [2021-11-09 08:31:27,521 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 114 transitions, 267 flow. Second operand has 5 states, 5 states have (on average 105.2) internal successors, (526), 5 states have internal predecessors, (526), 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) [2021-11-09 08:31:27,522 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:31:27,522 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 128 [2021-11-09 08:31:27,522 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:31:27,654 INFO L129 PetriNetUnfolder]: 93/369 cut-off events. [2021-11-09 08:31:27,654 INFO L130 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2021-11-09 08:31:27,656 INFO L84 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 369 events. 93/369 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1308 event pairs, 38 based on Foata normal form. 4/353 useless extension candidates. Maximal degree in co-relation 614. Up to 119 conditions per place. [2021-11-09 08:31:27,659 INFO L132 encePairwiseOnDemand]: 122/128 looper letters, 24 selfloop transitions, 4 changer transitions 8/127 dead transitions. [2021-11-09 08:31:27,659 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 127 transitions, 369 flow [2021-11-09 08:31:27,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:31:27,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-09 08:31:27,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 547 transitions. [2021-11-09 08:31:27,662 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8546875 [2021-11-09 08:31:27,663 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 547 transitions. [2021-11-09 08:31:27,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 547 transitions. [2021-11-09 08:31:27,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:31:27,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 547 transitions. [2021-11-09 08:31:27,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.4) internal successors, (547), 5 states have internal predecessors, (547), 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) [2021-11-09 08:31:27,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 128.0) internal successors, (768), 6 states have internal predecessors, (768), 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) [2021-11-09 08:31:27,669 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 128.0) internal successors, (768), 6 states have internal predecessors, (768), 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) [2021-11-09 08:31:27,670 INFO L186 Difference]: Start difference. First operand has 115 places, 114 transitions, 267 flow. Second operand 5 states and 547 transitions. [2021-11-09 08:31:27,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 127 transitions, 369 flow [2021-11-09 08:31:27,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 127 transitions, 369 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-09 08:31:27,675 INFO L242 Difference]: Finished difference. Result has 120 places, 111 transitions, 262 flow [2021-11-09 08:31:27,676 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=120, PETRI_TRANSITIONS=111} [2021-11-09 08:31:27,680 INFO L334 CegarLoopForPetriNet]: 114 programPoint places, 6 predicate places. [2021-11-09 08:31:27,680 INFO L470 AbstractCegarLoop]: Abstraction has has 120 places, 111 transitions, 262 flow [2021-11-09 08:31:27,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.2) internal successors, (526), 5 states have internal predecessors, (526), 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) [2021-11-09 08:31:27,681 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:31:27,681 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:27,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 08:31:27,682 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:31:27,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:27,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1675576756, now seen corresponding path program 2 times [2021-11-09 08:31:27,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:27,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443827029] [2021-11-09 08:31:27,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:27,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:27,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:27,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:27,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443827029] [2021-11-09 08:31:27,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443827029] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:27,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:27,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-09 08:31:27,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690266204] [2021-11-09 08:31:27,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:31:27,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:27,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:31:27,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:31:27,960 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 128 [2021-11-09 08:31:27,962 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 111 transitions, 262 flow. Second operand has 10 states, 10 states have (on average 88.7) internal successors, (887), 10 states have internal predecessors, (887), 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) [2021-11-09 08:31:27,963 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:31:27,963 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 128 [2021-11-09 08:31:27,963 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:31:28,457 INFO L129 PetriNetUnfolder]: 126/479 cut-off events. [2021-11-09 08:31:28,457 INFO L130 PetriNetUnfolder]: For 86/86 co-relation queries the response was YES. [2021-11-09 08:31:28,459 INFO L84 FinitePrefix]: Finished finitePrefix Result has 862 conditions, 479 events. 126/479 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1870 event pairs, 24 based on Foata normal form. 0/459 useless extension candidates. Maximal degree in co-relation 853. Up to 86 conditions per place. [2021-11-09 08:31:28,462 INFO L132 encePairwiseOnDemand]: 116/128 looper letters, 45 selfloop transitions, 6 changer transitions 37/163 dead transitions. [2021-11-09 08:31:28,462 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 163 transitions, 579 flow [2021-11-09 08:31:28,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:31:28,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-09 08:31:28,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1117 transitions. [2021-11-09 08:31:28,468 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7272135416666666 [2021-11-09 08:31:28,468 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1117 transitions. [2021-11-09 08:31:28,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1117 transitions. [2021-11-09 08:31:28,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:31:28,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1117 transitions. [2021-11-09 08:31:28,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.08333333333333) internal successors, (1117), 12 states have internal predecessors, (1117), 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) [2021-11-09 08:31:28,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 128.0) internal successors, (1664), 13 states have internal predecessors, (1664), 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) [2021-11-09 08:31:28,480 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 128.0) internal successors, (1664), 13 states have internal predecessors, (1664), 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) [2021-11-09 08:31:28,481 INFO L186 Difference]: Start difference. First operand has 120 places, 111 transitions, 262 flow. Second operand 12 states and 1117 transitions. [2021-11-09 08:31:28,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 163 transitions, 579 flow [2021-11-09 08:31:28,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 163 transitions, 563 flow, removed 2 selfloop flow, removed 4 redundant places. [2021-11-09 08:31:28,487 INFO L242 Difference]: Finished difference. Result has 131 places, 112 transitions, 284 flow [2021-11-09 08:31:28,488 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=284, PETRI_PLACES=131, PETRI_TRANSITIONS=112} [2021-11-09 08:31:28,488 INFO L334 CegarLoopForPetriNet]: 114 programPoint places, 17 predicate places. [2021-11-09 08:31:28,489 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 112 transitions, 284 flow [2021-11-09 08:31:28,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 88.7) internal successors, (887), 10 states have internal predecessors, (887), 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) [2021-11-09 08:31:28,490 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:31:28,490 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:28,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 08:31:28,490 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:31:28,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:28,491 INFO L85 PathProgramCache]: Analyzing trace with hash 293494998, now seen corresponding path program 1 times [2021-11-09 08:31:28,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:28,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628136113] [2021-11-09 08:31:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:28,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:31:28,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:28,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628136113] [2021-11-09 08:31:28,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628136113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:28,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283889359] [2021-11-09 08:31:28,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:28,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:28,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:28,737 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:28,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:31:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:28,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-09 08:31:28,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:30,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:31:31,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 08:31:31,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 08:31:31,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-09 08:31:32,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:32,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283889359] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:32,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:32,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 32] total 35 [2021-11-09 08:31:32,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945958859] [2021-11-09 08:31:32,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 08:31:32,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:32,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 08:31:32,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 08:31:32,115 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 128 [2021-11-09 08:31:32,118 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 112 transitions, 284 flow. Second operand has 35 states, 35 states have (on average 46.142857142857146) internal successors, (1615), 35 states have internal predecessors, (1615), 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) [2021-11-09 08:31:32,119 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:31:32,119 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 128 [2021-11-09 08:31:32,119 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:31:36,460 INFO L129 PetriNetUnfolder]: 826/1735 cut-off events. [2021-11-09 08:31:36,460 INFO L130 PetriNetUnfolder]: For 441/441 co-relation queries the response was YES. [2021-11-09 08:31:36,467 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3805 conditions, 1735 events. 826/1735 cut-off events. For 441/441 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10613 event pairs, 109 based on Foata normal form. 11/1680 useless extension candidates. Maximal degree in co-relation 3792. Up to 281 conditions per place. [2021-11-09 08:31:36,484 INFO L132 encePairwiseOnDemand]: 88/128 looper letters, 186 selfloop transitions, 57 changer transitions 7/288 dead transitions. [2021-11-09 08:31:36,484 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 288 transitions, 1288 flow [2021-11-09 08:31:36,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-09 08:31:36,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-11-09 08:31:36,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2276 transitions. [2021-11-09 08:31:36,498 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3783244680851064 [2021-11-09 08:31:36,498 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2276 transitions. [2021-11-09 08:31:36,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2276 transitions. [2021-11-09 08:31:36,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:31:36,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2276 transitions. [2021-11-09 08:31:36,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 48.42553191489362) internal successors, (2276), 47 states have internal predecessors, (2276), 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) [2021-11-09 08:31:36,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 128.0) internal successors, (6144), 48 states have internal predecessors, (6144), 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) [2021-11-09 08:31:36,527 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 128.0) internal successors, (6144), 48 states have internal predecessors, (6144), 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) [2021-11-09 08:31:36,527 INFO L186 Difference]: Start difference. First operand has 131 places, 112 transitions, 284 flow. Second operand 47 states and 2276 transitions. [2021-11-09 08:31:36,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 288 transitions, 1288 flow [2021-11-09 08:31:36,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 288 transitions, 1215 flow, removed 32 selfloop flow, removed 7 redundant places. [2021-11-09 08:31:36,540 INFO L242 Difference]: Finished difference. Result has 190 places, 150 transitions, 638 flow [2021-11-09 08:31:36,540 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=638, PETRI_PLACES=190, PETRI_TRANSITIONS=150} [2021-11-09 08:31:36,540 INFO L334 CegarLoopForPetriNet]: 114 programPoint places, 76 predicate places. [2021-11-09 08:31:36,541 INFO L470 AbstractCegarLoop]: Abstraction has has 190 places, 150 transitions, 638 flow [2021-11-09 08:31:36,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 46.142857142857146) internal successors, (1615), 35 states have internal predecessors, (1615), 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) [2021-11-09 08:31:36,542 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:31:36,542 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:36,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:36,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:36,743 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:31:36,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:36,744 INFO L85 PathProgramCache]: Analyzing trace with hash 494179975, now seen corresponding path program 1 times [2021-11-09 08:31:36,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:36,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731584947] [2021-11-09 08:31:36,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:36,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:36,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:31:36,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:36,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731584947] [2021-11-09 08:31:36,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731584947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:36,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:36,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:31:36,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179935542] [2021-11-09 08:31:36,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:31:36,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:36,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:31:36,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:31:36,873 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 128 [2021-11-09 08:31:36,874 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 150 transitions, 638 flow. Second operand has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 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) [2021-11-09 08:31:36,874 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:31:36,875 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 128 [2021-11-09 08:31:36,875 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:31:36,979 INFO L129 PetriNetUnfolder]: 52/411 cut-off events. [2021-11-09 08:31:36,979 INFO L130 PetriNetUnfolder]: For 399/404 co-relation queries the response was YES. [2021-11-09 08:31:36,984 INFO L84 FinitePrefix]: Finished finitePrefix Result has 933 conditions, 411 events. 52/411 cut-off events. For 399/404 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1512 event pairs, 19 based on Foata normal form. 1/383 useless extension candidates. Maximal degree in co-relation 897. Up to 32 conditions per place. [2021-11-09 08:31:36,987 INFO L132 encePairwiseOnDemand]: 125/128 looper letters, 5 selfloop transitions, 2 changer transitions 0/148 dead transitions. [2021-11-09 08:31:36,987 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 148 transitions, 628 flow [2021-11-09 08:31:36,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:31:36,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-09 08:31:36,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2021-11-09 08:31:36,990 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9192708333333334 [2021-11-09 08:31:36,990 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2021-11-09 08:31:36,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2021-11-09 08:31:36,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:31:36,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2021-11-09 08:31:36,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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) [2021-11-09 08:31:36,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 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) [2021-11-09 08:31:36,995 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 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) [2021-11-09 08:31:36,995 INFO L186 Difference]: Start difference. First operand has 190 places, 150 transitions, 638 flow. Second operand 3 states and 353 transitions. [2021-11-09 08:31:36,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 148 transitions, 628 flow [2021-11-09 08:31:37,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 148 transitions, 567 flow, removed 10 selfloop flow, removed 20 redundant places. [2021-11-09 08:31:37,009 INFO L242 Difference]: Finished difference. Result has 171 places, 147 transitions, 561 flow [2021-11-09 08:31:37,010 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=561, PETRI_PLACES=171, PETRI_TRANSITIONS=147} [2021-11-09 08:31:37,010 INFO L334 CegarLoopForPetriNet]: 114 programPoint places, 57 predicate places. [2021-11-09 08:31:37,011 INFO L470 AbstractCegarLoop]: Abstraction has has 171 places, 147 transitions, 561 flow [2021-11-09 08:31:37,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 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) [2021-11-09 08:31:37,011 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:31:37,012 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:37,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 08:31:37,013 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:31:37,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:37,013 INFO L85 PathProgramCache]: Analyzing trace with hash -2097558553, now seen corresponding path program 2 times [2021-11-09 08:31:37,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:37,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691227087] [2021-11-09 08:31:37,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:37,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:31:37,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:37,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691227087] [2021-11-09 08:31:37,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691227087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:37,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:37,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 08:31:37,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734676807] [2021-11-09 08:31:37,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:31:37,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:37,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:31:37,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:31:37,212 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 128 [2021-11-09 08:31:37,213 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 147 transitions, 561 flow. Second operand has 6 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 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) [2021-11-09 08:31:37,213 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:31:37,214 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 128 [2021-11-09 08:31:37,214 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:31:37,711 INFO L129 PetriNetUnfolder]: 407/1407 cut-off events. [2021-11-09 08:31:37,711 INFO L130 PetriNetUnfolder]: For 3284/3293 co-relation queries the response was YES. [2021-11-09 08:31:37,722 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4044 conditions, 1407 events. 407/1407 cut-off events. For 3284/3293 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 8355 event pairs, 129 based on Foata normal form. 6/1335 useless extension candidates. Maximal degree in co-relation 4009. Up to 397 conditions per place. [2021-11-09 08:31:37,734 INFO L132 encePairwiseOnDemand]: 120/128 looper letters, 67 selfloop transitions, 25 changer transitions 0/201 dead transitions. [2021-11-09 08:31:37,734 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 201 transitions, 1084 flow [2021-11-09 08:31:37,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:31:37,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-09 08:31:37,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 764 transitions. [2021-11-09 08:31:37,738 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8526785714285714 [2021-11-09 08:31:37,739 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 764 transitions. [2021-11-09 08:31:37,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 764 transitions. [2021-11-09 08:31:37,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:31:37,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 764 transitions. [2021-11-09 08:31:37,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 109.14285714285714) internal successors, (764), 7 states have internal predecessors, (764), 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) [2021-11-09 08:31:37,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 128.0) internal successors, (1024), 8 states have internal predecessors, (1024), 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) [2021-11-09 08:31:37,747 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 128.0) internal successors, (1024), 8 states have internal predecessors, (1024), 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) [2021-11-09 08:31:37,747 INFO L186 Difference]: Start difference. First operand has 171 places, 147 transitions, 561 flow. Second operand 7 states and 764 transitions. [2021-11-09 08:31:37,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 201 transitions, 1084 flow [2021-11-09 08:31:37,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 201 transitions, 1082 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-11-09 08:31:37,762 INFO L242 Difference]: Finished difference. Result has 181 places, 169 transitions, 804 flow [2021-11-09 08:31:37,762 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=804, PETRI_PLACES=181, PETRI_TRANSITIONS=169} [2021-11-09 08:31:37,763 INFO L334 CegarLoopForPetriNet]: 114 programPoint places, 67 predicate places. [2021-11-09 08:31:37,763 INFO L470 AbstractCegarLoop]: Abstraction has has 181 places, 169 transitions, 804 flow [2021-11-09 08:31:37,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 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) [2021-11-09 08:31:37,764 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:31:37,764 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:37,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 08:31:37,765 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:31:37,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:37,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1409007716, now seen corresponding path program 3 times [2021-11-09 08:31:37,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:37,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336432882] [2021-11-09 08:31:37,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:37,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:37,924 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:31:37,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:37,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336432882] [2021-11-09 08:31:37,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336432882] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:37,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:37,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:31:37,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334502174] [2021-11-09 08:31:37,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:31:37,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:37,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:31:37,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:31:37,935 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 128 [2021-11-09 08:31:37,936 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 169 transitions, 804 flow. Second operand has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 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) [2021-11-09 08:31:37,936 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:31:37,936 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 128 [2021-11-09 08:31:37,937 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:31:38,231 INFO L129 PetriNetUnfolder]: 104/873 cut-off events. [2021-11-09 08:31:38,232 INFO L130 PetriNetUnfolder]: For 1204/1236 co-relation queries the response was YES. [2021-11-09 08:31:38,242 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2137 conditions, 873 events. 104/873 cut-off events. For 1204/1236 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4704 event pairs, 39 based on Foata normal form. 47/886 useless extension candidates. Maximal degree in co-relation 2097. Up to 74 conditions per place. [2021-11-09 08:31:38,248 INFO L132 encePairwiseOnDemand]: 124/128 looper letters, 3 selfloop transitions, 4 changer transitions 0/165 dead transitions. [2021-11-09 08:31:38,248 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 165 transitions, 777 flow [2021-11-09 08:31:38,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:31:38,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-11-09 08:31:38,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 468 transitions. [2021-11-09 08:31:38,251 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9140625 [2021-11-09 08:31:38,251 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 468 transitions. [2021-11-09 08:31:38,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 468 transitions. [2021-11-09 08:31:38,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:31:38,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 468 transitions. [2021-11-09 08:31:38,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:38,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 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) [2021-11-09 08:31:38,257 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 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) [2021-11-09 08:31:38,257 INFO L186 Difference]: Start difference. First operand has 181 places, 169 transitions, 804 flow. Second operand 4 states and 468 transitions. [2021-11-09 08:31:38,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 165 transitions, 777 flow [2021-11-09 08:31:38,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 165 transitions, 767 flow, removed 5 selfloop flow, removed 0 redundant places. [2021-11-09 08:31:38,272 INFO L242 Difference]: Finished difference. Result has 186 places, 165 transitions, 772 flow [2021-11-09 08:31:38,272 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=772, PETRI_PLACES=186, PETRI_TRANSITIONS=165} [2021-11-09 08:31:38,273 INFO L334 CegarLoopForPetriNet]: 114 programPoint places, 72 predicate places. [2021-11-09 08:31:38,273 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 165 transitions, 772 flow [2021-11-09 08:31:38,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 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) [2021-11-09 08:31:38,274 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:31:38,274 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:38,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 08:31:38,277 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:31:38,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:38,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1668911217, now seen corresponding path program 1 times [2021-11-09 08:31:38,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:38,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116499326] [2021-11-09 08:31:38,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:38,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:38,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:38,604 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:31:38,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:38,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116499326] [2021-11-09 08:31:38,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116499326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:38,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8753607] [2021-11-09 08:31:38,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:38,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:38,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:38,607 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:38,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:31:38,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:38,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 08:31:38,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:40,265 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:40,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8753607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:40,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:40,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 28 [2021-11-09 08:31:40,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989433576] [2021-11-09 08:31:40,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 08:31:40,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:40,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 08:31:40,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-11-09 08:31:40,277 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 128 [2021-11-09 08:31:40,281 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 165 transitions, 772 flow. Second operand has 28 states, 28 states have (on average 86.71428571428571) internal successors, (2428), 28 states have internal predecessors, (2428), 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) [2021-11-09 08:31:40,282 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:31:40,282 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 128 [2021-11-09 08:31:40,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:31:41,974 INFO L129 PetriNetUnfolder]: 382/1522 cut-off events. [2021-11-09 08:31:41,974 INFO L130 PetriNetUnfolder]: For 3955/3965 co-relation queries the response was YES. [2021-11-09 08:31:41,990 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4768 conditions, 1522 events. 382/1522 cut-off events. For 3955/3965 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 9329 event pairs, 131 based on Foata normal form. 24/1495 useless extension candidates. Maximal degree in co-relation 4725. Up to 499 conditions per place. [2021-11-09 08:31:42,003 INFO L132 encePairwiseOnDemand]: 109/128 looper letters, 64 selfloop transitions, 13 changer transitions 51/206 dead transitions. [2021-11-09 08:31:42,003 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 206 transitions, 1284 flow [2021-11-09 08:31:42,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 08:31:42,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-11-09 08:31:42,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2033 transitions. [2021-11-09 08:31:42,056 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6905570652173914 [2021-11-09 08:31:42,057 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2033 transitions. [2021-11-09 08:31:42,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2033 transitions. [2021-11-09 08:31:42,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:31:42,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2033 transitions. [2021-11-09 08:31:42,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 88.3913043478261) internal successors, (2033), 23 states have internal predecessors, (2033), 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) [2021-11-09 08:31:42,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 128.0) internal successors, (3072), 24 states have internal predecessors, (3072), 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) [2021-11-09 08:31:42,099 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 128.0) internal successors, (3072), 24 states have internal predecessors, (3072), 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) [2021-11-09 08:31:42,100 INFO L186 Difference]: Start difference. First operand has 186 places, 165 transitions, 772 flow. Second operand 23 states and 2033 transitions. [2021-11-09 08:31:42,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 206 transitions, 1284 flow [2021-11-09 08:31:42,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 206 transitions, 1243 flow, removed 20 selfloop flow, removed 2 redundant places. [2021-11-09 08:31:42,124 INFO L242 Difference]: Finished difference. Result has 211 places, 137 transitions, 613 flow [2021-11-09 08:31:42,126 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=613, PETRI_PLACES=211, PETRI_TRANSITIONS=137} [2021-11-09 08:31:42,126 INFO L334 CegarLoopForPetriNet]: 114 programPoint places, 97 predicate places. [2021-11-09 08:31:42,126 INFO L470 AbstractCegarLoop]: Abstraction has has 211 places, 137 transitions, 613 flow [2021-11-09 08:31:42,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 86.71428571428571) internal successors, (2428), 28 states have internal predecessors, (2428), 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) [2021-11-09 08:31:42,129 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:31:42,129 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:42,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:42,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 08:31:42,344 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:31:42,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:42,345 INFO L85 PathProgramCache]: Analyzing trace with hash -119310915, now seen corresponding path program 2 times [2021-11-09 08:31:42,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:42,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859061272] [2021-11-09 08:31:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:42,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:44,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:44,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859061272] [2021-11-09 08:31:44,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859061272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:44,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592590566] [2021-11-09 08:31:44,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:31:44,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:44,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:44,236 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:44,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:31:44,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:31:44,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:44,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-09 08:31:44,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:46,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:31:47,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 08:31:47,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 08:31:49,711 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-09 08:31:49,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 21 [2021-11-09 08:31:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:49,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592590566] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:49,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:49,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 43] total 70 [2021-11-09 08:31:49,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91684144] [2021-11-09 08:31:49,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-09 08:31:49,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:49,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-09 08:31:49,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=4523, Unknown=0, NotChecked=0, Total=4830 [2021-11-09 08:31:49,882 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 128 [2021-11-09 08:31:49,886 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 137 transitions, 613 flow. Second operand has 70 states, 70 states have (on average 44.15714285714286) internal successors, (3091), 70 states have internal predecessors, (3091), 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) [2021-11-09 08:31:49,887 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:31:49,887 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 128 [2021-11-09 08:31:49,887 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:32:03,053 INFO L129 PetriNetUnfolder]: 2777/6335 cut-off events. [2021-11-09 08:32:03,053 INFO L130 PetriNetUnfolder]: For 41802/41802 co-relation queries the response was YES. [2021-11-09 08:32:03,140 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25090 conditions, 6335 events. 2777/6335 cut-off events. For 41802/41802 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 51019 event pairs, 296 based on Foata normal form. 4/6183 useless extension candidates. Maximal degree in co-relation 25039. Up to 1564 conditions per place. [2021-11-09 08:32:03,205 INFO L132 encePairwiseOnDemand]: 86/128 looper letters, 396 selfloop transitions, 92 changer transitions 11/538 dead transitions. [2021-11-09 08:32:03,205 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 538 transitions, 4537 flow [2021-11-09 08:32:03,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-09 08:32:03,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-11-09 08:32:03,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 3597 transitions. [2021-11-09 08:32:03,216 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3746875 [2021-11-09 08:32:03,217 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 3597 transitions. [2021-11-09 08:32:03,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 3597 transitions. [2021-11-09 08:32:03,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:32:03,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 3597 transitions. [2021-11-09 08:32:03,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 47.96) internal successors, (3597), 75 states have internal predecessors, (3597), 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) [2021-11-09 08:32:03,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 128.0) internal successors, (9728), 76 states have internal predecessors, (9728), 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) [2021-11-09 08:32:03,320 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 128.0) internal successors, (9728), 76 states have internal predecessors, (9728), 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) [2021-11-09 08:32:03,320 INFO L186 Difference]: Start difference. First operand has 211 places, 137 transitions, 613 flow. Second operand 75 states and 3597 transitions. [2021-11-09 08:32:03,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 538 transitions, 4537 flow [2021-11-09 08:32:03,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 538 transitions, 3891 flow, removed 302 selfloop flow, removed 27 redundant places. [2021-11-09 08:32:03,377 INFO L242 Difference]: Finished difference. Result has 285 places, 211 transitions, 1384 flow [2021-11-09 08:32:03,378 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=1384, PETRI_PLACES=285, PETRI_TRANSITIONS=211} [2021-11-09 08:32:03,378 INFO L334 CegarLoopForPetriNet]: 114 programPoint places, 171 predicate places. [2021-11-09 08:32:03,379 INFO L470 AbstractCegarLoop]: Abstraction has has 285 places, 211 transitions, 1384 flow [2021-11-09 08:32:03,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 44.15714285714286) internal successors, (3091), 70 states have internal predecessors, (3091), 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) [2021-11-09 08:32:03,399 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:32:03,399 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:03,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:03,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:03,615 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:32:03,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:03,616 INFO L85 PathProgramCache]: Analyzing trace with hash -259590821, now seen corresponding path program 3 times [2021-11-09 08:32:03,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:03,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229341172] [2021-11-09 08:32:03,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:03,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:05,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:05,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229341172] [2021-11-09 08:32:05,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229341172] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:05,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344206674] [2021-11-09 08:32:05,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:32:05,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:05,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:05,225 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:05,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:32:05,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 08:32:05,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:05,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 08:32:05,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:07,174 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-09 08:32:07,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 15 [2021-11-09 08:32:07,326 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:32:07,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344206674] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:07,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:07,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 19] total 45 [2021-11-09 08:32:07,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137627455] [2021-11-09 08:32:07,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-09 08:32:07,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:07,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-09 08:32:07,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1819, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 08:32:07,335 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 128 [2021-11-09 08:32:07,339 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 211 transitions, 1384 flow. Second operand has 45 states, 45 states have (on average 54.13333333333333) internal successors, (2436), 45 states have internal predecessors, (2436), 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) [2021-11-09 08:32:07,339 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:32:07,339 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 128 [2021-11-09 08:32:07,339 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:32:18,201 INFO L129 PetriNetUnfolder]: 5684/13001 cut-off events. [2021-11-09 08:32:18,201 INFO L130 PetriNetUnfolder]: For 55267/55279 co-relation queries the response was YES. [2021-11-09 08:32:18,454 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50980 conditions, 13001 events. 5684/13001 cut-off events. For 55267/55279 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 121330 event pairs, 724 based on Foata normal form. 62/12722 useless extension candidates. Maximal degree in co-relation 50894. Up to 3133 conditions per place. [2021-11-09 08:32:18,558 INFO L132 encePairwiseOnDemand]: 94/128 looper letters, 401 selfloop transitions, 274 changer transitions 8/727 dead transitions. [2021-11-09 08:32:18,558 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 727 transitions, 6894 flow [2021-11-09 08:32:18,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-09 08:32:18,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-11-09 08:32:18,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 4470 transitions. [2021-11-09 08:32:18,571 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4420490506329114 [2021-11-09 08:32:18,571 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 4470 transitions. [2021-11-09 08:32:18,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 4470 transitions. [2021-11-09 08:32:18,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:32:18,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 4470 transitions. [2021-11-09 08:32:18,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 56.58227848101266) internal successors, (4470), 79 states have internal predecessors, (4470), 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) [2021-11-09 08:32:18,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 128.0) internal successors, (10240), 80 states have internal predecessors, (10240), 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) [2021-11-09 08:32:18,625 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 128.0) internal successors, (10240), 80 states have internal predecessors, (10240), 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) [2021-11-09 08:32:18,625 INFO L186 Difference]: Start difference. First operand has 285 places, 211 transitions, 1384 flow. Second operand 79 states and 4470 transitions. [2021-11-09 08:32:18,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 727 transitions, 6894 flow [2021-11-09 08:32:18,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 727 transitions, 6546 flow, removed 159 selfloop flow, removed 17 redundant places. [2021-11-09 08:32:18,988 INFO L242 Difference]: Finished difference. Result has 393 places, 437 transitions, 4495 flow [2021-11-09 08:32:18,989 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=4495, PETRI_PLACES=393, PETRI_TRANSITIONS=437} [2021-11-09 08:32:18,990 INFO L334 CegarLoopForPetriNet]: 114 programPoint places, 279 predicate places. [2021-11-09 08:32:18,990 INFO L470 AbstractCegarLoop]: Abstraction has has 393 places, 437 transitions, 4495 flow [2021-11-09 08:32:18,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.13333333333333) internal successors, (2436), 45 states have internal predecessors, (2436), 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) [2021-11-09 08:32:18,991 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:32:18,992 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:19,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:19,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:19,208 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:32:19,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:19,209 INFO L85 PathProgramCache]: Analyzing trace with hash 29780675, now seen corresponding path program 4 times [2021-11-09 08:32:19,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:19,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928361624] [2021-11-09 08:32:19,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:19,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:19,378 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:32:19,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:19,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928361624] [2021-11-09 08:32:19,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928361624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:19,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853239806] [2021-11-09 08:32:19,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:32:19,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:19,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:19,382 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:19,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:32:19,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:32:19,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:19,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-09 08:32:19,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:20,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:32:20,802 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 08:32:20,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 08:32:21,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:32:21,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 08:32:21,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 08:32:23,966 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-09 08:32:23,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 21 [2021-11-09 08:32:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:24,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853239806] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:24,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:24,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 43] total 48 [2021-11-09 08:32:24,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011392733] [2021-11-09 08:32:24,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-09 08:32:24,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:24,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-09 08:32:24,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2044, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 08:32:24,244 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 128 [2021-11-09 08:32:24,247 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 437 transitions, 4495 flow. Second operand has 48 states, 48 states have (on average 42.520833333333336) internal successors, (2041), 48 states have internal predecessors, (2041), 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) [2021-11-09 08:32:24,247 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:32:24,248 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 128 [2021-11-09 08:32:24,248 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:32:45,780 INFO L129 PetriNetUnfolder]: 10713/24730 cut-off events. [2021-11-09 08:32:45,780 INFO L130 PetriNetUnfolder]: For 668517/668795 co-relation queries the response was YES. [2021-11-09 08:32:46,358 INFO L84 FinitePrefix]: Finished finitePrefix Result has 160901 conditions, 24730 events. 10713/24730 cut-off events. For 668517/668795 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 253113 event pairs, 878 based on Foata normal form. 383/24367 useless extension candidates. Maximal degree in co-relation 160767. Up to 5771 conditions per place. [2021-11-09 08:32:46,574 INFO L132 encePairwiseOnDemand]: 84/128 looper letters, 684 selfloop transitions, 449 changer transitions 84/1253 dead transitions. [2021-11-09 08:32:46,574 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 1253 transitions, 18642 flow [2021-11-09 08:32:46,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-11-09 08:32:46,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2021-11-09 08:32:46,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 5578 transitions. [2021-11-09 08:32:46,598 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3514364919354839 [2021-11-09 08:32:46,599 INFO L72 ComplementDD]: Start complementDD. Operand 124 states and 5578 transitions. [2021-11-09 08:32:46,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 124 states and 5578 transitions. [2021-11-09 08:32:46,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:32:46,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 124 states and 5578 transitions. [2021-11-09 08:32:46,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 125 states, 124 states have (on average 44.983870967741936) internal successors, (5578), 124 states have internal predecessors, (5578), 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) [2021-11-09 08:32:46,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 125 states, 125 states have (on average 128.0) internal successors, (16000), 125 states have internal predecessors, (16000), 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) [2021-11-09 08:32:46,655 INFO L81 ComplementDD]: Finished complementDD. Result has 125 states, 125 states have (on average 128.0) internal successors, (16000), 125 states have internal predecessors, (16000), 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) [2021-11-09 08:32:46,655 INFO L186 Difference]: Start difference. First operand has 393 places, 437 transitions, 4495 flow. Second operand 124 states and 5578 transitions. [2021-11-09 08:32:46,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 1253 transitions, 18642 flow [2021-11-09 08:32:49,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 1253 transitions, 17525 flow, removed 531 selfloop flow, removed 25 redundant places. [2021-11-09 08:32:49,120 INFO L242 Difference]: Finished difference. Result has 567 places, 797 transitions, 11875 flow [2021-11-09 08:32:49,121 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=4058, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=124, PETRI_FLOW=11875, PETRI_PLACES=567, PETRI_TRANSITIONS=797} [2021-11-09 08:32:49,122 INFO L334 CegarLoopForPetriNet]: 114 programPoint places, 453 predicate places. [2021-11-09 08:32:49,122 INFO L470 AbstractCegarLoop]: Abstraction has has 567 places, 797 transitions, 11875 flow [2021-11-09 08:32:49,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 42.520833333333336) internal successors, (2041), 48 states have internal predecessors, (2041), 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) [2021-11-09 08:32:49,123 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:32:49,124 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:49,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:49,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 08:32:49,330 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:32:49,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:49,331 INFO L85 PathProgramCache]: Analyzing trace with hash 786931985, now seen corresponding path program 5 times [2021-11-09 08:32:49,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:49,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825146185] [2021-11-09 08:32:49,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:49,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:32:49,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:49,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825146185] [2021-11-09 08:32:49,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825146185] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:49,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134987393] [2021-11-09 08:32:49,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:32:49,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:49,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:49,912 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:49,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:32:50,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-09 08:32:50,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:50,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-09 08:32:50,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:51,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:32:52,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:32:52,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 08:32:52,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 08:32:55,368 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-11-09 08:32:55,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 35 [2021-11-09 08:32:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:55,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134987393] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:55,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:55,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 41] total 51 [2021-11-09 08:32:55,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60612397] [2021-11-09 08:32:55,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-09 08:32:55,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:55,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-09 08:32:55,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2378, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 08:32:55,490 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 128 [2021-11-09 08:32:55,493 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 797 transitions, 11875 flow. Second operand has 51 states, 51 states have (on average 41.98039215686274) internal successors, (2141), 51 states have internal predecessors, (2141), 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) [2021-11-09 08:32:55,493 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:32:55,493 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 128 [2021-11-09 08:32:55,493 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:33:27,484 INFO L129 PetriNetUnfolder]: 16186/35050 cut-off events. [2021-11-09 08:33:27,484 INFO L130 PetriNetUnfolder]: For 1967605/1968115 co-relation queries the response was YES. [2021-11-09 08:33:29,214 INFO L84 FinitePrefix]: Finished finitePrefix Result has 271323 conditions, 35050 events. 16186/35050 cut-off events. For 1967605/1968115 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 353814 event pairs, 3233 based on Foata normal form. 139/34323 useless extension candidates. Maximal degree in co-relation 271114. Up to 18545 conditions per place. [2021-11-09 08:33:29,547 INFO L132 encePairwiseOnDemand]: 92/128 looper letters, 868 selfloop transitions, 191 changer transitions 41/1155 dead transitions. [2021-11-09 08:33:29,547 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 1155 transitions, 19847 flow [2021-11-09 08:33:29,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-09 08:33:29,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-11-09 08:33:29,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3040 transitions. [2021-11-09 08:33:29,555 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.35447761194029853 [2021-11-09 08:33:29,555 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3040 transitions. [2021-11-09 08:33:29,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3040 transitions. [2021-11-09 08:33:29,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:33:29,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3040 transitions. [2021-11-09 08:33:29,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 45.37313432835821) internal successors, (3040), 67 states have internal predecessors, (3040), 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) [2021-11-09 08:33:29,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 128.0) internal successors, (8704), 68 states have internal predecessors, (8704), 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) [2021-11-09 08:33:29,582 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 128.0) internal successors, (8704), 68 states have internal predecessors, (8704), 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) [2021-11-09 08:33:29,582 INFO L186 Difference]: Start difference. First operand has 567 places, 797 transitions, 11875 flow. Second operand 67 states and 3040 transitions. [2021-11-09 08:33:29,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 1155 transitions, 19847 flow [2021-11-09 08:33:38,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 572 places, 1155 transitions, 16838 flow, removed 1431 selfloop flow, removed 45 redundant places. [2021-11-09 08:33:38,661 INFO L242 Difference]: Finished difference. Result has 597 places, 866 transitions, 11076 flow [2021-11-09 08:33:38,662 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=9357, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=11076, PETRI_PLACES=597, PETRI_TRANSITIONS=866} [2021-11-09 08:33:38,662 INFO L334 CegarLoopForPetriNet]: 114 programPoint places, 483 predicate places. [2021-11-09 08:33:38,663 INFO L470 AbstractCegarLoop]: Abstraction has has 597 places, 866 transitions, 11076 flow [2021-11-09 08:33:38,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 41.98039215686274) internal successors, (2141), 51 states have internal predecessors, (2141), 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) [2021-11-09 08:33:38,664 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:33:38,664 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:38,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:38,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 08:33:38,880 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:33:38,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:38,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1170711605, now seen corresponding path program 6 times [2021-11-09 08:33:38,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:38,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778074259] [2021-11-09 08:33:38,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:38,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:40,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:40,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778074259] [2021-11-09 08:33:40,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778074259] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:40,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889150961] [2021-11-09 08:33:40,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:33:40,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:40,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:40,341 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:40,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:33:41,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-09 08:33:41,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:41,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-09 08:33:41,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:42,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:33:43,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 08:33:43,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 08:33:45,292 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-09 08:33:45,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 21 [2021-11-09 08:33:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:45,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889150961] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:45,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:45,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 37] total 62 [2021-11-09 08:33:45,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921512355] [2021-11-09 08:33:45,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-09 08:33:45,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:45,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-09 08:33:45,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=3515, Unknown=0, NotChecked=0, Total=3782 [2021-11-09 08:33:45,428 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 128 [2021-11-09 08:33:45,431 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 866 transitions, 11076 flow. Second operand has 62 states, 62 states have (on average 44.45161290322581) internal successors, (2756), 62 states have internal predecessors, (2756), 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) [2021-11-09 08:33:45,431 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:33:45,432 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 128 [2021-11-09 08:33:45,432 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:34:07,382 INFO L129 PetriNetUnfolder]: 7736/19062 cut-off events. [2021-11-09 08:34:07,382 INFO L130 PetriNetUnfolder]: For 1538316/1538840 co-relation queries the response was YES. [2021-11-09 08:34:08,125 INFO L84 FinitePrefix]: Finished finitePrefix Result has 166287 conditions, 19062 events. 7736/19062 cut-off events. For 1538316/1538840 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 196030 event pairs, 1325 based on Foata normal form. 394/18781 useless extension candidates. Maximal degree in co-relation 166070. Up to 5964 conditions per place. [2021-11-09 08:34:08,312 INFO L132 encePairwiseOnDemand]: 93/128 looper letters, 580 selfloop transitions, 426 changer transitions 20/1068 dead transitions. [2021-11-09 08:34:08,312 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 1068 transitions, 17155 flow [2021-11-09 08:34:08,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-09 08:34:08,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-11-09 08:34:08,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 3650 transitions. [2021-11-09 08:34:08,324 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3703327922077922 [2021-11-09 08:34:08,324 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 3650 transitions. [2021-11-09 08:34:08,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 3650 transitions. [2021-11-09 08:34:08,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:34:08,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 3650 transitions. [2021-11-09 08:34:08,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 47.4025974025974) internal successors, (3650), 77 states have internal predecessors, (3650), 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) [2021-11-09 08:34:08,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 128.0) internal successors, (9984), 78 states have internal predecessors, (9984), 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) [2021-11-09 08:34:08,362 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 128.0) internal successors, (9984), 78 states have internal predecessors, (9984), 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) [2021-11-09 08:34:08,362 INFO L186 Difference]: Start difference. First operand has 597 places, 866 transitions, 11076 flow. Second operand 77 states and 3650 transitions. [2021-11-09 08:34:08,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 1068 transitions, 17155 flow [2021-11-09 08:34:12,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 631 places, 1068 transitions, 15292 flow, removed 787 selfloop flow, removed 34 redundant places. [2021-11-09 08:34:12,037 INFO L242 Difference]: Finished difference. Result has 671 places, 832 transitions, 11758 flow [2021-11-09 08:34:12,038 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=6858, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=11758, PETRI_PLACES=671, PETRI_TRANSITIONS=832} [2021-11-09 08:34:12,039 INFO L334 CegarLoopForPetriNet]: 114 programPoint places, 557 predicate places. [2021-11-09 08:34:12,039 INFO L470 AbstractCegarLoop]: Abstraction has has 671 places, 832 transitions, 11758 flow [2021-11-09 08:34:12,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 44.45161290322581) internal successors, (2756), 62 states have internal predecessors, (2756), 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) [2021-11-09 08:34:12,040 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:34:12,040 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:12,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:12,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 08:34:12,241 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:34:12,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:12,241 INFO L85 PathProgramCache]: Analyzing trace with hash -681308195, now seen corresponding path program 7 times [2021-11-09 08:34:12,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:12,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434722276] [2021-11-09 08:34:12,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:12,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:34:13,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:13,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434722276] [2021-11-09 08:34:13,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434722276] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:13,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010573405] [2021-11-09 08:34:13,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:34:13,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:13,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:13,773 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:13,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628dbff8-0f0a-4b7e-821a-064b50adbe9a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:34:14,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:14,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-09 08:34:14,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:16,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:34:16,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 08:34:17,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 08:34:18,705 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-09 08:34:18,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 21 [2021-11-09 08:34:18,870 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:34:18,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010573405] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:18,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:18,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 41] total 66 [2021-11-09 08:34:18,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192012502] [2021-11-09 08:34:18,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-09 08:34:18,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:18,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-09 08:34:18,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=3990, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 08:34:18,881 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 128 [2021-11-09 08:34:18,885 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 671 places, 832 transitions, 11758 flow. Second operand has 66 states, 66 states have (on average 44.303030303030305) internal successors, (2924), 66 states have internal predecessors, (2924), 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) [2021-11-09 08:34:18,885 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:34:18,885 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 128 [2021-11-09 08:34:18,885 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand