./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-easy11.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-easy11.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc --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 a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:43:55,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:43:55,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:43:56,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:43:56,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:43:56,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:43:56,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:43:56,010 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:43:56,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:43:56,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:43:56,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:43:56,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:43:56,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:43:56,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:43:56,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:43:56,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:43:56,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:43:56,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:43:56,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:43:56,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:43:56,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:43:56,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:43:56,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:43:56,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:43:56,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:43:56,060 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:43:56,060 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:43:56,061 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:43:56,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:43:56,064 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:43:56,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:43:56,066 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:43:56,068 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:43:56,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:43:56,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:43:56,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:43:56,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:43:56,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:43:56,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:43:56,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:43:56,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:43:56,074 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:43:56,111 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:43:56,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:43:56,119 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:43:56,119 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:43:56,120 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:43:56,120 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:43:56,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:43:56,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:43:56,121 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:43:56,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:43:56,123 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:43:56,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:43:56,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:43:56,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:43:56,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:43:56,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:43:56,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:43:56,124 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:43:56,124 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:43:56,125 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:43:56,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:43:56,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:43:56,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:43:56,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:43:56,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:43:56,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:43:56,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:43:56,126 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:43:56,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:43:56,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:43:56,127 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:43:56,127 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:43:56,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:43:56,128 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_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 [2022-11-02 20:43:56,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:43:56,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:43:56,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:43:56,419 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:43:56,420 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:43:56,422 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/weaver/test-easy11.wvr.c [2022-11-02 20:43:56,503 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/data/efff932e0/93cb78ab253c4632bcb2ebbb1f4a0fa2/FLAGabb655a74 [2022-11-02 20:43:56,909 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:43:56,909 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/sv-benchmarks/c/weaver/test-easy11.wvr.c [2022-11-02 20:43:56,917 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/data/efff932e0/93cb78ab253c4632bcb2ebbb1f4a0fa2/FLAGabb655a74 [2022-11-02 20:43:57,315 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/data/efff932e0/93cb78ab253c4632bcb2ebbb1f4a0fa2 [2022-11-02 20:43:57,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:43:57,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:43:57,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:43:57,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:43:57,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:43:57,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:43:57" (1/1) ... [2022-11-02 20:43:57,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30e02e9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:57, skipping insertion in model container [2022-11-02 20:43:57,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:43:57" (1/1) ... [2022-11-02 20:43:57,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:43:57,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:43:57,673 WARN L230 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_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/sv-benchmarks/c/weaver/test-easy11.wvr.c[2005,2018] [2022-11-02 20:43:57,677 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:43:57,687 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:43:57,719 WARN L230 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_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/sv-benchmarks/c/weaver/test-easy11.wvr.c[2005,2018] [2022-11-02 20:43:57,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:43:57,733 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:43:57,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:57 WrapperNode [2022-11-02 20:43:57,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:43:57,735 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:43:57,736 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:43:57,736 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:43:57,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:57" (1/1) ... [2022-11-02 20:43:57,749 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:57" (1/1) ... [2022-11-02 20:43:57,765 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-11-02 20:43:57,766 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:43:57,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:43:57,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:43:57,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:43:57,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:57" (1/1) ... [2022-11-02 20:43:57,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:57" (1/1) ... [2022-11-02 20:43:57,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:57" (1/1) ... [2022-11-02 20:43:57,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:57" (1/1) ... [2022-11-02 20:43:57,785 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:57" (1/1) ... [2022-11-02 20:43:57,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:57" (1/1) ... [2022-11-02 20:43:57,790 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:57" (1/1) ... [2022-11-02 20:43:57,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:57" (1/1) ... [2022-11-02 20:43:57,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:43:57,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:43:57,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:43:57,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:43:57,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:57" (1/1) ... [2022-11-02 20:43:57,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:43:57,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:57,831 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:43:57,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:43:57,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:43:57,866 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-02 20:43:57,867 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-02 20:43:57,867 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-02 20:43:57,867 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-02 20:43:57,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:43:57,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:43:57,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:43:57,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-02 20:43:57,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-02 20:43:57,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:43:57,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:43:57,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:43:57,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:43:57,869 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 20:43:57,949 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:43:57,951 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:43:58,102 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:43:58,109 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:43:58,110 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:43:58,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:43:58 BoogieIcfgContainer [2022-11-02 20:43:58,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:43:58,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:43:58,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:43:58,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:43:58,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:43:57" (1/3) ... [2022-11-02 20:43:58,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f1614a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:43:58, skipping insertion in model container [2022-11-02 20:43:58,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:57" (2/3) ... [2022-11-02 20:43:58,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f1614a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:43:58, skipping insertion in model container [2022-11-02 20:43:58,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:43:58" (3/3) ... [2022-11-02 20:43:58,121 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2022-11-02 20:43:58,130 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:43:58,141 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:43:58,141 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:43:58,141 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:43:58,240 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-02 20:43:58,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2022-11-02 20:43:58,420 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2022-11-02 20:43:58,430 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:43:58,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2022-11-02 20:43:58,435 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2022-11-02 20:43:58,442 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2022-11-02 20:43:58,465 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:43:58,476 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@58dd954f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:43:58,476 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-02 20:43:58,520 INFO L130 PetriNetUnfolder]: 6/75 cut-off events. [2022-11-02 20:43:58,524 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:43:58,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:58,525 INFO L208 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] [2022-11-02 20:43:58,526 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:58,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:58,534 INFO L85 PathProgramCache]: Analyzing trace with hash -384738625, now seen corresponding path program 1 times [2022-11-02 20:43:58,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:58,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083683468] [2022-11-02 20:43:58,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:58,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:58,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:58,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083683468] [2022-11-02 20:43:58,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083683468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:58,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:58,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:43:58,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020626010] [2022-11-02 20:43:58,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:58,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:43:58,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:58,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:43:58,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:43:58,849 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 87 [2022-11-02 20:43:58,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 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) [2022-11-02 20:43:58,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:58,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 87 [2022-11-02 20:43:58,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:58,888 INFO L130 PetriNetUnfolder]: 2/72 cut-off events. [2022-11-02 20:43:58,888 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-02 20:43:58,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 72 events. 2/72 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 6/74 useless extension candidates. Maximal degree in co-relation 48. Up to 5 conditions per place. [2022-11-02 20:43:58,890 INFO L137 encePairwiseOnDemand]: 83/87 looper letters, 4 selfloop transitions, 0 changer transitions 2/72 dead transitions. [2022-11-02 20:43:58,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 164 flow [2022-11-02 20:43:58,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:43:58,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:43:58,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 164 transitions. [2022-11-02 20:43:58,904 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9425287356321839 [2022-11-02 20:43:58,905 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 164 transitions. [2022-11-02 20:43:58,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 164 transitions. [2022-11-02 20:43:58,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:58,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 164 transitions. [2022-11-02 20:43:58,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 82.0) internal successors, (164), 2 states have internal predecessors, (164), 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) [2022-11-02 20:43:58,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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) [2022-11-02 20:43:58,930 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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) [2022-11-02 20:43:58,932 INFO L175 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 2 states and 164 transitions. [2022-11-02 20:43:58,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 164 flow [2022-11-02 20:43:58,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 156 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-02 20:43:58,942 INFO L231 Difference]: Finished difference. Result has 74 places, 70 transitions, 144 flow [2022-11-02 20:43:58,945 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=144, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2022-11-02 20:43:58,948 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, -3 predicate places. [2022-11-02 20:43:58,949 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 144 flow [2022-11-02 20:43:58,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 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) [2022-11-02 20:43:58,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:58,950 INFO L208 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] [2022-11-02 20:43:58,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:43:58,950 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:58,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:58,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1457758209, now seen corresponding path program 1 times [2022-11-02 20:43:58,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:58,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924083169] [2022-11-02 20:43:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:58,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:59,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:59,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:59,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924083169] [2022-11-02 20:43:59,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924083169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:59,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:59,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 20:43:59,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355151774] [2022-11-02 20:43:59,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:59,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:43:59,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:59,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:43:59,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:43:59,876 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-02 20:43:59,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 144 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:43:59,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:59,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-02 20:43:59,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:00,472 INFO L130 PetriNetUnfolder]: 106/357 cut-off events. [2022-11-02 20:44:00,472 INFO L131 PetriNetUnfolder]: For 22/28 co-relation queries the response was YES. [2022-11-02 20:44:00,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 357 events. 106/357 cut-off events. For 22/28 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1686 event pairs, 21 based on Foata normal form. 3/325 useless extension candidates. Maximal degree in co-relation 598. Up to 57 conditions per place. [2022-11-02 20:44:00,477 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 60 selfloop transitions, 16 changer transitions 8/125 dead transitions. [2022-11-02 20:44:00,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 125 transitions, 431 flow [2022-11-02 20:44:00,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:44:00,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:44:00,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 799 transitions. [2022-11-02 20:44:00,488 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6559934318555009 [2022-11-02 20:44:00,488 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 799 transitions. [2022-11-02 20:44:00,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 799 transitions. [2022-11-02 20:44:00,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:00,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 799 transitions. [2022-11-02 20:44:00,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 57.07142857142857) internal successors, (799), 14 states have internal predecessors, (799), 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) [2022-11-02 20:44:00,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:00,510 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:00,510 INFO L175 Difference]: Start difference. First operand has 74 places, 70 transitions, 144 flow. Second operand 14 states and 799 transitions. [2022-11-02 20:44:00,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 125 transitions, 431 flow [2022-11-02 20:44:00,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 125 transitions, 431 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:44:00,519 INFO L231 Difference]: Finished difference. Result has 92 places, 82 transitions, 241 flow [2022-11-02 20:44:00,519 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=241, PETRI_PLACES=92, PETRI_TRANSITIONS=82} [2022-11-02 20:44:00,521 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 15 predicate places. [2022-11-02 20:44:00,521 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 82 transitions, 241 flow [2022-11-02 20:44:00,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:00,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:00,523 INFO L208 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] [2022-11-02 20:44:00,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:44:00,523 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:00,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:00,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1980240921, now seen corresponding path program 2 times [2022-11-02 20:44:00,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:00,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464671105] [2022-11-02 20:44:00,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:00,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:01,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:01,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:01,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464671105] [2022-11-02 20:44:01,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464671105] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:01,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:01,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 20:44:01,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66312425] [2022-11-02 20:44:01,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:01,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:44:01,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:01,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:44:01,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:44:01,080 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-02 20:44:01,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 82 transitions, 241 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:01,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:01,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-02 20:44:01,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:01,547 INFO L130 PetriNetUnfolder]: 111/370 cut-off events. [2022-11-02 20:44:01,548 INFO L131 PetriNetUnfolder]: For 151/151 co-relation queries the response was YES. [2022-11-02 20:44:01,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 370 events. 111/370 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1727 event pairs, 31 based on Foata normal form. 1/366 useless extension candidates. Maximal degree in co-relation 812. Up to 98 conditions per place. [2022-11-02 20:44:01,557 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 54 selfloop transitions, 18 changer transitions 8/121 dead transitions. [2022-11-02 20:44:01,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 121 transitions, 526 flow [2022-11-02 20:44:01,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:44:01,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:44:01,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-11-02 20:44:01,561 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-11-02 20:44:01,562 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-11-02 20:44:01,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-11-02 20:44:01,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:01,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-11-02 20:44:01,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 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) [2022-11-02 20:44:01,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:01,570 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:01,570 INFO L175 Difference]: Start difference. First operand has 92 places, 82 transitions, 241 flow. Second operand 14 states and 792 transitions. [2022-11-02 20:44:01,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 121 transitions, 526 flow [2022-11-02 20:44:01,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 121 transitions, 510 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-11-02 20:44:01,579 INFO L231 Difference]: Finished difference. Result has 101 places, 87 transitions, 309 flow [2022-11-02 20:44:01,580 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=309, PETRI_PLACES=101, PETRI_TRANSITIONS=87} [2022-11-02 20:44:01,583 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 24 predicate places. [2022-11-02 20:44:01,583 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 87 transitions, 309 flow [2022-11-02 20:44:01,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:01,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:01,584 INFO L208 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] [2022-11-02 20:44:01,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:44:01,585 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:01,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:01,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1386736289, now seen corresponding path program 3 times [2022-11-02 20:44:01,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:01,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184196527] [2022-11-02 20:44:01,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:01,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:02,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:02,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184196527] [2022-11-02 20:44:02,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184196527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:02,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:02,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 20:44:02,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462538739] [2022-11-02 20:44:02,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:02,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:44:02,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:02,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:44:02,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:44:02,048 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-02 20:44:02,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 87 transitions, 309 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:02,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:02,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-02 20:44:02,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:02,560 INFO L130 PetriNetUnfolder]: 139/385 cut-off events. [2022-11-02 20:44:02,561 INFO L131 PetriNetUnfolder]: For 382/382 co-relation queries the response was YES. [2022-11-02 20:44:02,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 385 events. 139/385 cut-off events. For 382/382 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1756 event pairs, 35 based on Foata normal form. 1/377 useless extension candidates. Maximal degree in co-relation 1057. Up to 107 conditions per place. [2022-11-02 20:44:02,566 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 53 selfloop transitions, 28 changer transitions 8/130 dead transitions. [2022-11-02 20:44:02,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 130 transitions, 684 flow [2022-11-02 20:44:02,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:44:02,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:44:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2022-11-02 20:44:02,570 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2022-11-02 20:44:02,570 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2022-11-02 20:44:02,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2022-11-02 20:44:02,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:02,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2022-11-02 20:44:02,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 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) [2022-11-02 20:44:02,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:02,579 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:02,579 INFO L175 Difference]: Start difference. First operand has 101 places, 87 transitions, 309 flow. Second operand 14 states and 794 transitions. [2022-11-02 20:44:02,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 130 transitions, 684 flow [2022-11-02 20:44:02,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 130 transitions, 614 flow, removed 10 selfloop flow, removed 11 redundant places. [2022-11-02 20:44:02,591 INFO L231 Difference]: Finished difference. Result has 106 places, 98 transitions, 427 flow [2022-11-02 20:44:02,591 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=427, PETRI_PLACES=106, PETRI_TRANSITIONS=98} [2022-11-02 20:44:02,593 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 29 predicate places. [2022-11-02 20:44:02,593 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 98 transitions, 427 flow [2022-11-02 20:44:02,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:02,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:02,598 INFO L208 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] [2022-11-02 20:44:02,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:44:02,599 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:02,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:02,599 INFO L85 PathProgramCache]: Analyzing trace with hash -83195579, now seen corresponding path program 4 times [2022-11-02 20:44:02,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:02,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696778314] [2022-11-02 20:44:02,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:02,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:03,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:03,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:03,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696778314] [2022-11-02 20:44:03,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696778314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:03,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:03,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 20:44:03,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441251877] [2022-11-02 20:44:03,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:03,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:44:03,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:03,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:44:03,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:44:03,040 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-02 20:44:03,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 98 transitions, 427 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:03,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:03,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-02 20:44:03,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:03,424 INFO L130 PetriNetUnfolder]: 162/417 cut-off events. [2022-11-02 20:44:03,425 INFO L131 PetriNetUnfolder]: For 637/637 co-relation queries the response was YES. [2022-11-02 20:44:03,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1340 conditions, 417 events. 162/417 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1882 event pairs, 47 based on Foata normal form. 1/406 useless extension candidates. Maximal degree in co-relation 1322. Up to 121 conditions per place. [2022-11-02 20:44:03,430 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 61 selfloop transitions, 38 changer transitions 8/148 dead transitions. [2022-11-02 20:44:03,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 148 transitions, 919 flow [2022-11-02 20:44:03,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:44:03,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:44:03,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-11-02 20:44:03,433 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-11-02 20:44:03,433 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-11-02 20:44:03,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-11-02 20:44:03,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:03,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-11-02 20:44:03,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 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) [2022-11-02 20:44:03,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:03,439 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:03,439 INFO L175 Difference]: Start difference. First operand has 106 places, 98 transitions, 427 flow. Second operand 14 states and 790 transitions. [2022-11-02 20:44:03,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 148 transitions, 919 flow [2022-11-02 20:44:03,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 148 transitions, 842 flow, removed 15 selfloop flow, removed 9 redundant places. [2022-11-02 20:44:03,447 INFO L231 Difference]: Finished difference. Result has 114 places, 114 transitions, 631 flow [2022-11-02 20:44:03,448 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=631, PETRI_PLACES=114, PETRI_TRANSITIONS=114} [2022-11-02 20:44:03,449 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 37 predicate places. [2022-11-02 20:44:03,449 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 114 transitions, 631 flow [2022-11-02 20:44:03,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:03,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:03,450 INFO L208 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] [2022-11-02 20:44:03,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:44:03,450 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:03,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:03,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1878158297, now seen corresponding path program 5 times [2022-11-02 20:44:03,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:03,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066214417] [2022-11-02 20:44:03,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:03,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:03,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:03,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066214417] [2022-11-02 20:44:03,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066214417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:03,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:03,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 20:44:03,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60613757] [2022-11-02 20:44:03,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:03,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:44:03,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:03,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:44:03,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:44:03,839 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-02 20:44:03,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 114 transitions, 631 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:03,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:03,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-02 20:44:03,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:04,195 INFO L130 PetriNetUnfolder]: 166/441 cut-off events. [2022-11-02 20:44:04,196 INFO L131 PetriNetUnfolder]: For 878/878 co-relation queries the response was YES. [2022-11-02 20:44:04,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1537 conditions, 441 events. 166/441 cut-off events. For 878/878 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2104 event pairs, 44 based on Foata normal form. 1/435 useless extension candidates. Maximal degree in co-relation 1515. Up to 120 conditions per place. [2022-11-02 20:44:04,201 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 68 selfloop transitions, 38 changer transitions 8/155 dead transitions. [2022-11-02 20:44:04,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 155 transitions, 1061 flow [2022-11-02 20:44:04,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:44:04,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:44:04,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 796 transitions. [2022-11-02 20:44:04,205 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6535303776683087 [2022-11-02 20:44:04,205 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 796 transitions. [2022-11-02 20:44:04,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 796 transitions. [2022-11-02 20:44:04,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:04,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 796 transitions. [2022-11-02 20:44:04,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.857142857142854) internal successors, (796), 14 states have internal predecessors, (796), 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) [2022-11-02 20:44:04,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:04,211 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:04,212 INFO L175 Difference]: Start difference. First operand has 114 places, 114 transitions, 631 flow. Second operand 14 states and 796 transitions. [2022-11-02 20:44:04,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 155 transitions, 1061 flow [2022-11-02 20:44:04,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 155 transitions, 989 flow, removed 22 selfloop flow, removed 8 redundant places. [2022-11-02 20:44:04,222 INFO L231 Difference]: Finished difference. Result has 120 places, 115 transitions, 679 flow [2022-11-02 20:44:04,222 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=679, PETRI_PLACES=120, PETRI_TRANSITIONS=115} [2022-11-02 20:44:04,223 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 43 predicate places. [2022-11-02 20:44:04,224 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 115 transitions, 679 flow [2022-11-02 20:44:04,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:04,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:04,225 INFO L208 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] [2022-11-02 20:44:04,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:44:04,225 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:04,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:04,226 INFO L85 PathProgramCache]: Analyzing trace with hash 211517427, now seen corresponding path program 6 times [2022-11-02 20:44:04,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:04,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341105637] [2022-11-02 20:44:04,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:04,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:04,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:04,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:04,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341105637] [2022-11-02 20:44:04,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341105637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:04,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:04,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 20:44:04,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372094905] [2022-11-02 20:44:04,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:04,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:44:04,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:04,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:44:04,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:44:04,557 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-02 20:44:04,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 115 transitions, 679 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:04,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:04,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-02 20:44:04,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:04,922 INFO L130 PetriNetUnfolder]: 184/501 cut-off events. [2022-11-02 20:44:04,922 INFO L131 PetriNetUnfolder]: For 1267/1269 co-relation queries the response was YES. [2022-11-02 20:44:04,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1749 conditions, 501 events. 184/501 cut-off events. For 1267/1269 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2421 event pairs, 35 based on Foata normal form. 3/496 useless extension candidates. Maximal degree in co-relation 1726. Up to 143 conditions per place. [2022-11-02 20:44:04,929 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 63 selfloop transitions, 43 changer transitions 7/154 dead transitions. [2022-11-02 20:44:04,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 154 transitions, 1142 flow [2022-11-02 20:44:04,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:44:04,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:44:04,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-11-02 20:44:04,932 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-11-02 20:44:04,932 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-11-02 20:44:04,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-11-02 20:44:04,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:04,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-11-02 20:44:04,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 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) [2022-11-02 20:44:04,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:04,939 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:04,939 INFO L175 Difference]: Start difference. First operand has 120 places, 115 transitions, 679 flow. Second operand 14 states and 793 transitions. [2022-11-02 20:44:04,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 154 transitions, 1142 flow [2022-11-02 20:44:04,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 154 transitions, 1028 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-11-02 20:44:04,951 INFO L231 Difference]: Finished difference. Result has 124 places, 124 transitions, 821 flow [2022-11-02 20:44:04,952 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=821, PETRI_PLACES=124, PETRI_TRANSITIONS=124} [2022-11-02 20:44:04,952 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 47 predicate places. [2022-11-02 20:44:04,953 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 124 transitions, 821 flow [2022-11-02 20:44:04,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:04,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:04,954 INFO L208 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] [2022-11-02 20:44:04,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:44:04,954 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:04,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:04,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1533574161, now seen corresponding path program 7 times [2022-11-02 20:44:04,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:04,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776376099] [2022-11-02 20:44:04,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:04,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:05,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:05,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776376099] [2022-11-02 20:44:05,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776376099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:05,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:05,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 20:44:05,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964564818] [2022-11-02 20:44:05,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:05,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:44:05,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:05,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:44:05,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:44:05,294 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-02 20:44:05,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 124 transitions, 821 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:05,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:05,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-02 20:44:05,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:05,635 INFO L130 PetriNetUnfolder]: 183/506 cut-off events. [2022-11-02 20:44:05,635 INFO L131 PetriNetUnfolder]: For 1565/1567 co-relation queries the response was YES. [2022-11-02 20:44:05,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1851 conditions, 506 events. 183/506 cut-off events. For 1565/1567 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2499 event pairs, 37 based on Foata normal form. 3/504 useless extension candidates. Maximal degree in co-relation 1825. Up to 142 conditions per place. [2022-11-02 20:44:05,641 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 68 selfloop transitions, 43 changer transitions 8/160 dead transitions. [2022-11-02 20:44:05,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 160 transitions, 1256 flow [2022-11-02 20:44:05,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:44:05,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:44:05,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-11-02 20:44:05,645 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-11-02 20:44:05,645 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-11-02 20:44:05,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-11-02 20:44:05,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:05,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-11-02 20:44:05,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 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) [2022-11-02 20:44:05,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:05,651 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:05,651 INFO L175 Difference]: Start difference. First operand has 124 places, 124 transitions, 821 flow. Second operand 14 states and 790 transitions. [2022-11-02 20:44:05,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 160 transitions, 1256 flow [2022-11-02 20:44:05,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 160 transitions, 1177 flow, removed 14 selfloop flow, removed 9 redundant places. [2022-11-02 20:44:05,661 INFO L231 Difference]: Finished difference. Result has 128 places, 122 transitions, 829 flow [2022-11-02 20:44:05,662 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=829, PETRI_PLACES=128, PETRI_TRANSITIONS=122} [2022-11-02 20:44:05,663 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 51 predicate places. [2022-11-02 20:44:05,663 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 122 transitions, 829 flow [2022-11-02 20:44:05,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:05,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:05,664 INFO L208 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] [2022-11-02 20:44:05,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:44:05,664 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:05,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:05,665 INFO L85 PathProgramCache]: Analyzing trace with hash -364553813, now seen corresponding path program 8 times [2022-11-02 20:44:05,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:05,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118822811] [2022-11-02 20:44:05,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:05,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:05,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:05,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118822811] [2022-11-02 20:44:05,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118822811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:05,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:05,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 20:44:05,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417658097] [2022-11-02 20:44:05,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:05,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:44:05,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:05,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:44:05,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:44:05,987 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-02 20:44:05,988 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 122 transitions, 829 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:05,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:05,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-02 20:44:05,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:06,479 INFO L130 PetriNetUnfolder]: 183/504 cut-off events. [2022-11-02 20:44:06,480 INFO L131 PetriNetUnfolder]: For 1784/1786 co-relation queries the response was YES. [2022-11-02 20:44:06,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1866 conditions, 504 events. 183/504 cut-off events. For 1784/1786 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2476 event pairs, 34 based on Foata normal form. 3/499 useless extension candidates. Maximal degree in co-relation 1840. Up to 141 conditions per place. [2022-11-02 20:44:06,487 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 62 selfloop transitions, 44 changer transitions 8/155 dead transitions. [2022-11-02 20:44:06,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 155 transitions, 1217 flow [2022-11-02 20:44:06,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:44:06,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:44:06,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 795 transitions. [2022-11-02 20:44:06,493 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6527093596059114 [2022-11-02 20:44:06,493 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 795 transitions. [2022-11-02 20:44:06,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 795 transitions. [2022-11-02 20:44:06,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:06,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 795 transitions. [2022-11-02 20:44:06,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.785714285714285) internal successors, (795), 14 states have internal predecessors, (795), 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) [2022-11-02 20:44:06,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:06,502 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:06,502 INFO L175 Difference]: Start difference. First operand has 128 places, 122 transitions, 829 flow. Second operand 14 states and 795 transitions. [2022-11-02 20:44:06,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 155 transitions, 1217 flow [2022-11-02 20:44:06,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 155 transitions, 1117 flow, removed 6 selfloop flow, removed 12 redundant places. [2022-11-02 20:44:06,515 INFO L231 Difference]: Finished difference. Result has 129 places, 124 transitions, 877 flow [2022-11-02 20:44:06,516 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=877, PETRI_PLACES=129, PETRI_TRANSITIONS=124} [2022-11-02 20:44:06,517 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 52 predicate places. [2022-11-02 20:44:06,517 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 124 transitions, 877 flow [2022-11-02 20:44:06,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:06,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:06,518 INFO L208 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] [2022-11-02 20:44:06,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 20:44:06,519 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:06,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:06,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1352752699, now seen corresponding path program 9 times [2022-11-02 20:44:06,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:06,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607279240] [2022-11-02 20:44:06,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:06,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:06,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:06,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607279240] [2022-11-02 20:44:06,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607279240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:06,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:06,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 20:44:06,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874682137] [2022-11-02 20:44:06,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:06,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:44:06,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:06,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:44:06,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:44:06,883 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-02 20:44:06,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 124 transitions, 877 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:06,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:06,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-02 20:44:06,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:07,337 INFO L130 PetriNetUnfolder]: 177/457 cut-off events. [2022-11-02 20:44:07,338 INFO L131 PetriNetUnfolder]: For 1791/1793 co-relation queries the response was YES. [2022-11-02 20:44:07,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1819 conditions, 457 events. 177/457 cut-off events. For 1791/1793 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2186 event pairs, 37 based on Foata normal form. 1/449 useless extension candidates. Maximal degree in co-relation 1791. Up to 132 conditions per place. [2022-11-02 20:44:07,344 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 62 selfloop transitions, 42 changer transitions 8/153 dead transitions. [2022-11-02 20:44:07,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 153 transitions, 1217 flow [2022-11-02 20:44:07,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:44:07,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:44:07,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-11-02 20:44:07,347 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-11-02 20:44:07,347 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-11-02 20:44:07,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-11-02 20:44:07,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:07,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-11-02 20:44:07,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 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) [2022-11-02 20:44:07,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:07,352 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:07,352 INFO L175 Difference]: Start difference. First operand has 129 places, 124 transitions, 877 flow. Second operand 14 states and 793 transitions. [2022-11-02 20:44:07,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 153 transitions, 1217 flow [2022-11-02 20:44:07,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 153 transitions, 1127 flow, removed 10 selfloop flow, removed 10 redundant places. [2022-11-02 20:44:07,364 INFO L231 Difference]: Finished difference. Result has 132 places, 122 transitions, 858 flow [2022-11-02 20:44:07,364 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=858, PETRI_PLACES=132, PETRI_TRANSITIONS=122} [2022-11-02 20:44:07,365 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 55 predicate places. [2022-11-02 20:44:07,365 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 122 transitions, 858 flow [2022-11-02 20:44:07,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:07,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:07,366 INFO L208 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] [2022-11-02 20:44:07,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:44:07,367 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:07,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:07,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1962214603, now seen corresponding path program 10 times [2022-11-02 20:44:07,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:07,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029975781] [2022-11-02 20:44:07,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:07,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:07,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:07,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029975781] [2022-11-02 20:44:07,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029975781] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:07,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:07,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 20:44:07,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858539710] [2022-11-02 20:44:07,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:07,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:44:07,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:07,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:44:07,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:44:07,697 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-02 20:44:07,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 122 transitions, 858 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:07,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:07,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-02 20:44:07,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:08,179 INFO L130 PetriNetUnfolder]: 186/518 cut-off events. [2022-11-02 20:44:08,179 INFO L131 PetriNetUnfolder]: For 1890/1894 co-relation queries the response was YES. [2022-11-02 20:44:08,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1919 conditions, 518 events. 186/518 cut-off events. For 1890/1894 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2648 event pairs, 27 based on Foata normal form. 3/516 useless extension candidates. Maximal degree in co-relation 1891. Up to 139 conditions per place. [2022-11-02 20:44:08,186 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 65 selfloop transitions, 43 changer transitions 8/157 dead transitions. [2022-11-02 20:44:08,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 157 transitions, 1235 flow [2022-11-02 20:44:08,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:44:08,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:44:08,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 797 transitions. [2022-11-02 20:44:08,188 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6543513957307061 [2022-11-02 20:44:08,188 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 797 transitions. [2022-11-02 20:44:08,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 797 transitions. [2022-11-02 20:44:08,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:08,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 797 transitions. [2022-11-02 20:44:08,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.92857142857143) internal successors, (797), 14 states have internal predecessors, (797), 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) [2022-11-02 20:44:08,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:08,194 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:08,194 INFO L175 Difference]: Start difference. First operand has 132 places, 122 transitions, 858 flow. Second operand 14 states and 797 transitions. [2022-11-02 20:44:08,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 157 transitions, 1235 flow [2022-11-02 20:44:08,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 157 transitions, 1137 flow, removed 7 selfloop flow, removed 12 redundant places. [2022-11-02 20:44:08,206 INFO L231 Difference]: Finished difference. Result has 132 places, 123 transitions, 872 flow [2022-11-02 20:44:08,206 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=872, PETRI_PLACES=132, PETRI_TRANSITIONS=123} [2022-11-02 20:44:08,207 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 55 predicate places. [2022-11-02 20:44:08,207 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 123 transitions, 872 flow [2022-11-02 20:44:08,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:08,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:08,208 INFO L208 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] [2022-11-02 20:44:08,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 20:44:08,209 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:08,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:08,209 INFO L85 PathProgramCache]: Analyzing trace with hash -318523859, now seen corresponding path program 11 times [2022-11-02 20:44:08,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:08,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779506339] [2022-11-02 20:44:08,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:08,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:08,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:08,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:08,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779506339] [2022-11-02 20:44:08,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779506339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:08,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:08,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 20:44:08,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931269749] [2022-11-02 20:44:08,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:08,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:44:08,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:08,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:44:08,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:44:08,551 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-02 20:44:08,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 123 transitions, 872 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:08,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:08,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-02 20:44:08,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:08,999 INFO L130 PetriNetUnfolder]: 184/531 cut-off events. [2022-11-02 20:44:08,999 INFO L131 PetriNetUnfolder]: For 2015/2017 co-relation queries the response was YES. [2022-11-02 20:44:09,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1944 conditions, 531 events. 184/531 cut-off events. For 2015/2017 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2756 event pairs, 35 based on Foata normal form. 3/527 useless extension candidates. Maximal degree in co-relation 1915. Up to 147 conditions per place. [2022-11-02 20:44:09,006 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 66 selfloop transitions, 43 changer transitions 7/157 dead transitions. [2022-11-02 20:44:09,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 157 transitions, 1242 flow [2022-11-02 20:44:09,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:44:09,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:44:09,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 795 transitions. [2022-11-02 20:44:09,009 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6527093596059114 [2022-11-02 20:44:09,009 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 795 transitions. [2022-11-02 20:44:09,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 795 transitions. [2022-11-02 20:44:09,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:09,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 795 transitions. [2022-11-02 20:44:09,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.785714285714285) internal successors, (795), 14 states have internal predecessors, (795), 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) [2022-11-02 20:44:09,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:09,015 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:09,015 INFO L175 Difference]: Start difference. First operand has 132 places, 123 transitions, 872 flow. Second operand 14 states and 795 transitions. [2022-11-02 20:44:09,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 157 transitions, 1242 flow [2022-11-02 20:44:09,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 157 transitions, 1140 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-11-02 20:44:09,026 INFO L231 Difference]: Finished difference. Result has 134 places, 125 transitions, 886 flow [2022-11-02 20:44:09,027 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=886, PETRI_PLACES=134, PETRI_TRANSITIONS=125} [2022-11-02 20:44:09,031 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 57 predicate places. [2022-11-02 20:44:09,032 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 125 transitions, 886 flow [2022-11-02 20:44:09,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:09,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:09,033 INFO L208 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] [2022-11-02 20:44:09,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 20:44:09,033 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:09,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:09,034 INFO L85 PathProgramCache]: Analyzing trace with hash 33584437, now seen corresponding path program 12 times [2022-11-02 20:44:09,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:09,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569991943] [2022-11-02 20:44:09,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:09,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:09,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:09,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:09,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569991943] [2022-11-02 20:44:09,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569991943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:09,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:09,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 20:44:09,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196358160] [2022-11-02 20:44:09,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:09,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:44:09,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:09,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:44:09,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:44:09,355 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-02 20:44:09,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 125 transitions, 886 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:09,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:09,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-02 20:44:09,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:09,751 INFO L130 PetriNetUnfolder]: 179/495 cut-off events. [2022-11-02 20:44:09,751 INFO L131 PetriNetUnfolder]: For 1983/1983 co-relation queries the response was YES. [2022-11-02 20:44:09,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1887 conditions, 495 events. 179/495 cut-off events. For 1983/1983 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2514 event pairs, 43 based on Foata normal form. 1/486 useless extension candidates. Maximal degree in co-relation 1857. Up to 143 conditions per place. [2022-11-02 20:44:09,757 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 64 selfloop transitions, 40 changer transitions 8/153 dead transitions. [2022-11-02 20:44:09,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 153 transitions, 1228 flow [2022-11-02 20:44:09,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:44:09,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:44:09,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 791 transitions. [2022-11-02 20:44:09,774 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6494252873563219 [2022-11-02 20:44:09,774 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 791 transitions. [2022-11-02 20:44:09,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 791 transitions. [2022-11-02 20:44:09,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:09,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 791 transitions. [2022-11-02 20:44:09,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.5) internal successors, (791), 14 states have internal predecessors, (791), 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) [2022-11-02 20:44:09,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:09,782 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:09,782 INFO L175 Difference]: Start difference. First operand has 134 places, 125 transitions, 886 flow. Second operand 14 states and 791 transitions. [2022-11-02 20:44:09,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 153 transitions, 1228 flow [2022-11-02 20:44:09,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 153 transitions, 1130 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-11-02 20:44:09,794 INFO L231 Difference]: Finished difference. Result has 134 places, 122 transitions, 847 flow [2022-11-02 20:44:09,794 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=847, PETRI_PLACES=134, PETRI_TRANSITIONS=122} [2022-11-02 20:44:09,795 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 57 predicate places. [2022-11-02 20:44:09,796 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 122 transitions, 847 flow [2022-11-02 20:44:09,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:09,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:09,797 INFO L208 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] [2022-11-02 20:44:09,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-02 20:44:09,797 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:09,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:09,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1539772675, now seen corresponding path program 13 times [2022-11-02 20:44:09,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:09,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855389359] [2022-11-02 20:44:09,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:09,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:09,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:10,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:10,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:10,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855389359] [2022-11-02 20:44:10,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855389359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:10,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:10,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 20:44:10,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442710478] [2022-11-02 20:44:10,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:10,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:44:10,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:10,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:44:10,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:44:10,134 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-02 20:44:10,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 122 transitions, 847 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:10,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:10,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-02 20:44:10,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:10,556 INFO L130 PetriNetUnfolder]: 178/481 cut-off events. [2022-11-02 20:44:10,556 INFO L131 PetriNetUnfolder]: For 1912/1914 co-relation queries the response was YES. [2022-11-02 20:44:10,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1857 conditions, 481 events. 178/481 cut-off events. For 1912/1914 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2393 event pairs, 45 based on Foata normal form. 1/471 useless extension candidates. Maximal degree in co-relation 1828. Up to 142 conditions per place. [2022-11-02 20:44:10,562 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 63 selfloop transitions, 42 changer transitions 7/153 dead transitions. [2022-11-02 20:44:10,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 153 transitions, 1228 flow [2022-11-02 20:44:10,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:44:10,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:44:10,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-11-02 20:44:10,564 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-11-02 20:44:10,564 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-11-02 20:44:10,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-11-02 20:44:10,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:10,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-11-02 20:44:10,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 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) [2022-11-02 20:44:10,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:10,569 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:10,569 INFO L175 Difference]: Start difference. First operand has 134 places, 122 transitions, 847 flow. Second operand 14 states and 792 transitions. [2022-11-02 20:44:10,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 153 transitions, 1228 flow [2022-11-02 20:44:10,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 153 transitions, 1130 flow, removed 7 selfloop flow, removed 11 redundant places. [2022-11-02 20:44:10,581 INFO L231 Difference]: Finished difference. Result has 136 places, 124 transitions, 893 flow [2022-11-02 20:44:10,581 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=893, PETRI_PLACES=136, PETRI_TRANSITIONS=124} [2022-11-02 20:44:10,582 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 59 predicate places. [2022-11-02 20:44:10,582 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 124 transitions, 893 flow [2022-11-02 20:44:10,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:10,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:10,583 INFO L208 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] [2022-11-02 20:44:10,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-02 20:44:10,584 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:10,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:10,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1154053461, now seen corresponding path program 14 times [2022-11-02 20:44:10,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:10,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402248724] [2022-11-02 20:44:10,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:10,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:10,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:10,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:10,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402248724] [2022-11-02 20:44:10,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402248724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:10,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:10,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 20:44:10,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407339509] [2022-11-02 20:44:10,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:10,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:44:10,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:10,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:44:10,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:44:10,862 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-02 20:44:10,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 124 transitions, 893 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:10,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:10,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-02 20:44:10,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:11,276 INFO L130 PetriNetUnfolder]: 184/547 cut-off events. [2022-11-02 20:44:11,276 INFO L131 PetriNetUnfolder]: For 2021/2025 co-relation queries the response was YES. [2022-11-02 20:44:11,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2012 conditions, 547 events. 184/547 cut-off events. For 2021/2025 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2963 event pairs, 41 based on Foata normal form. 3/542 useless extension candidates. Maximal degree in co-relation 1980. Up to 132 conditions per place. [2022-11-02 20:44:11,283 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 75 selfloop transitions, 40 changer transitions 7/163 dead transitions. [2022-11-02 20:44:11,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 163 transitions, 1328 flow [2022-11-02 20:44:11,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:44:11,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:44:11,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-11-02 20:44:11,289 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-11-02 20:44:11,289 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-11-02 20:44:11,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-11-02 20:44:11,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:11,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-11-02 20:44:11,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 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) [2022-11-02 20:44:11,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:11,295 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:11,295 INFO L175 Difference]: Start difference. First operand has 136 places, 124 transitions, 893 flow. Second operand 14 states and 793 transitions. [2022-11-02 20:44:11,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 163 transitions, 1328 flow [2022-11-02 20:44:11,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 163 transitions, 1247 flow, removed 9 selfloop flow, removed 10 redundant places. [2022-11-02 20:44:11,309 INFO L231 Difference]: Finished difference. Result has 141 places, 127 transitions, 941 flow [2022-11-02 20:44:11,310 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=941, PETRI_PLACES=141, PETRI_TRANSITIONS=127} [2022-11-02 20:44:11,311 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 64 predicate places. [2022-11-02 20:44:11,311 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 127 transitions, 941 flow [2022-11-02 20:44:11,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:11,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:11,312 INFO L208 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] [2022-11-02 20:44:11,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-02 20:44:11,313 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:11,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:11,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1555045935, now seen corresponding path program 15 times [2022-11-02 20:44:11,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:11,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912533912] [2022-11-02 20:44:11,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:11,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:11,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:11,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912533912] [2022-11-02 20:44:11,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912533912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:11,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:11,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 20:44:11,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761606864] [2022-11-02 20:44:11,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:11,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:44:11,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:11,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:44:11,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:44:11,627 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-02 20:44:11,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 127 transitions, 941 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:11,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:11,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-02 20:44:11,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:12,068 INFO L130 PetriNetUnfolder]: 183/546 cut-off events. [2022-11-02 20:44:12,069 INFO L131 PetriNetUnfolder]: For 2136/2140 co-relation queries the response was YES. [2022-11-02 20:44:12,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2038 conditions, 546 events. 183/546 cut-off events. For 2136/2140 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2954 event pairs, 41 based on Foata normal form. 3/541 useless extension candidates. Maximal degree in co-relation 2004. Up to 161 conditions per place. [2022-11-02 20:44:12,075 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 70 selfloop transitions, 38 changer transitions 8/157 dead transitions. [2022-11-02 20:44:12,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 157 transitions, 1329 flow [2022-11-02 20:44:12,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:44:12,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:44:12,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 788 transitions. [2022-11-02 20:44:12,078 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6469622331691297 [2022-11-02 20:44:12,078 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 788 transitions. [2022-11-02 20:44:12,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 788 transitions. [2022-11-02 20:44:12,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:12,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 788 transitions. [2022-11-02 20:44:12,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.285714285714285) internal successors, (788), 14 states have internal predecessors, (788), 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) [2022-11-02 20:44:12,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:12,099 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:12,099 INFO L175 Difference]: Start difference. First operand has 141 places, 127 transitions, 941 flow. Second operand 14 states and 788 transitions. [2022-11-02 20:44:12,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 157 transitions, 1329 flow [2022-11-02 20:44:12,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 157 transitions, 1239 flow, removed 10 selfloop flow, removed 11 redundant places. [2022-11-02 20:44:12,115 INFO L231 Difference]: Finished difference. Result has 143 places, 125 transitions, 915 flow [2022-11-02 20:44:12,116 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=915, PETRI_PLACES=143, PETRI_TRANSITIONS=125} [2022-11-02 20:44:12,116 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 66 predicate places. [2022-11-02 20:44:12,122 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 125 transitions, 915 flow [2022-11-02 20:44:12,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:12,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:12,123 INFO L208 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] [2022-11-02 20:44:12,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-02 20:44:12,124 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:12,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:12,124 INFO L85 PathProgramCache]: Analyzing trace with hash -125718487, now seen corresponding path program 16 times [2022-11-02 20:44:12,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:12,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765111025] [2022-11-02 20:44:12,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:12,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:12,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:12,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:12,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765111025] [2022-11-02 20:44:12,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765111025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:12,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:12,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 20:44:12,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909557981] [2022-11-02 20:44:12,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:12,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:44:12,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:12,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:44:12,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:44:12,407 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-02 20:44:12,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 125 transitions, 915 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:12,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:12,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-02 20:44:12,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:12,736 INFO L130 PetriNetUnfolder]: 179/514 cut-off events. [2022-11-02 20:44:12,737 INFO L131 PetriNetUnfolder]: For 2071/2073 co-relation queries the response was YES. [2022-11-02 20:44:12,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1987 conditions, 514 events. 179/514 cut-off events. For 2071/2073 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2736 event pairs, 51 based on Foata normal form. 1/503 useless extension candidates. Maximal degree in co-relation 1953. Up to 151 conditions per place. [2022-11-02 20:44:12,743 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 72 selfloop transitions, 39 changer transitions 7/159 dead transitions. [2022-11-02 20:44:12,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 159 transitions, 1328 flow [2022-11-02 20:44:12,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:44:12,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:44:12,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-11-02 20:44:12,745 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-11-02 20:44:12,745 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-11-02 20:44:12,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-11-02 20:44:12,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:12,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-11-02 20:44:12,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 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) [2022-11-02 20:44:12,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:12,751 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:12,751 INFO L175 Difference]: Start difference. First operand has 143 places, 125 transitions, 915 flow. Second operand 14 states and 790 transitions. [2022-11-02 20:44:12,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 159 transitions, 1328 flow [2022-11-02 20:44:12,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 159 transitions, 1238 flow, removed 7 selfloop flow, removed 12 redundant places. [2022-11-02 20:44:12,764 INFO L231 Difference]: Finished difference. Result has 143 places, 126 transitions, 931 flow [2022-11-02 20:44:12,765 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=931, PETRI_PLACES=143, PETRI_TRANSITIONS=126} [2022-11-02 20:44:12,765 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 66 predicate places. [2022-11-02 20:44:12,765 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 126 transitions, 931 flow [2022-11-02 20:44:12,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:12,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:12,766 INFO L208 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] [2022-11-02 20:44:12,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-02 20:44:12,767 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:12,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:12,767 INFO L85 PathProgramCache]: Analyzing trace with hash -100489433, now seen corresponding path program 17 times [2022-11-02 20:44:12,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:12,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2467858] [2022-11-02 20:44:12,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:12,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:13,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:13,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2467858] [2022-11-02 20:44:13,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2467858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:13,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:13,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 20:44:13,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258467002] [2022-11-02 20:44:13,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:13,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:44:13,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:13,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:44:13,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:44:13,057 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-02 20:44:13,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 126 transitions, 931 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:13,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:13,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-02 20:44:13,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:13,495 INFO L130 PetriNetUnfolder]: 186/566 cut-off events. [2022-11-02 20:44:13,495 INFO L131 PetriNetUnfolder]: For 2240/2244 co-relation queries the response was YES. [2022-11-02 20:44:13,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2106 conditions, 566 events. 186/566 cut-off events. For 2240/2244 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3184 event pairs, 39 based on Foata normal form. 3/561 useless extension candidates. Maximal degree in co-relation 2071. Up to 158 conditions per place. [2022-11-02 20:44:13,501 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 71 selfloop transitions, 41 changer transitions 8/161 dead transitions. [2022-11-02 20:44:13,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 161 transitions, 1340 flow [2022-11-02 20:44:13,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:44:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:44:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 796 transitions. [2022-11-02 20:44:13,504 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6535303776683087 [2022-11-02 20:44:13,504 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 796 transitions. [2022-11-02 20:44:13,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 796 transitions. [2022-11-02 20:44:13,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:13,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 796 transitions. [2022-11-02 20:44:13,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.857142857142854) internal successors, (796), 14 states have internal predecessors, (796), 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) [2022-11-02 20:44:13,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:13,508 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:13,508 INFO L175 Difference]: Start difference. First operand has 143 places, 126 transitions, 931 flow. Second operand 14 states and 796 transitions. [2022-11-02 20:44:13,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 161 transitions, 1340 flow [2022-11-02 20:44:13,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 161 transitions, 1246 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-11-02 20:44:13,521 INFO L231 Difference]: Finished difference. Result has 145 places, 128 transitions, 957 flow [2022-11-02 20:44:13,522 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=957, PETRI_PLACES=145, PETRI_TRANSITIONS=128} [2022-11-02 20:44:13,522 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 68 predicate places. [2022-11-02 20:44:13,522 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 128 transitions, 957 flow [2022-11-02 20:44:13,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:13,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:13,523 INFO L208 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] [2022-11-02 20:44:13,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-02 20:44:13,523 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:13,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:13,524 INFO L85 PathProgramCache]: Analyzing trace with hash 35132145, now seen corresponding path program 18 times [2022-11-02 20:44:13,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:13,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232702341] [2022-11-02 20:44:13,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:13,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:13,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:13,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:13,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232702341] [2022-11-02 20:44:13,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232702341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:13,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:13,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 20:44:13,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949611584] [2022-11-02 20:44:13,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:13,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:44:13,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:13,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:44:13,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:44:13,802 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-02 20:44:13,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 128 transitions, 957 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:13,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:13,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-02 20:44:13,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:14,277 INFO L130 PetriNetUnfolder]: 182/534 cut-off events. [2022-11-02 20:44:14,277 INFO L131 PetriNetUnfolder]: For 2349/2351 co-relation queries the response was YES. [2022-11-02 20:44:14,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2079 conditions, 534 events. 182/534 cut-off events. For 2349/2351 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2962 event pairs, 48 based on Foata normal form. 1/524 useless extension candidates. Maximal degree in co-relation 2043. Up to 166 conditions per place. [2022-11-02 20:44:14,283 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 38 changer transitions 9/157 dead transitions. [2022-11-02 20:44:14,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 157 transitions, 1329 flow [2022-11-02 20:44:14,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:44:14,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:44:14,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 791 transitions. [2022-11-02 20:44:14,286 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6494252873563219 [2022-11-02 20:44:14,286 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 791 transitions. [2022-11-02 20:44:14,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 791 transitions. [2022-11-02 20:44:14,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:14,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 791 transitions. [2022-11-02 20:44:14,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.5) internal successors, (791), 14 states have internal predecessors, (791), 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) [2022-11-02 20:44:14,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:14,291 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:14,291 INFO L175 Difference]: Start difference. First operand has 145 places, 128 transitions, 957 flow. Second operand 14 states and 791 transitions. [2022-11-02 20:44:14,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 157 transitions, 1329 flow [2022-11-02 20:44:14,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 157 transitions, 1231 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-11-02 20:44:14,306 INFO L231 Difference]: Finished difference. Result has 146 places, 126 transitions, 920 flow [2022-11-02 20:44:14,306 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=920, PETRI_PLACES=146, PETRI_TRANSITIONS=126} [2022-11-02 20:44:14,307 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 69 predicate places. [2022-11-02 20:44:14,307 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 126 transitions, 920 flow [2022-11-02 20:44:14,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:14,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:14,308 INFO L208 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] [2022-11-02 20:44:14,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-02 20:44:14,308 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:14,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:14,309 INFO L85 PathProgramCache]: Analyzing trace with hash -228457297, now seen corresponding path program 19 times [2022-11-02 20:44:14,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:14,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607235507] [2022-11-02 20:44:14,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:14,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:14,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:14,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607235507] [2022-11-02 20:44:14,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607235507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:14,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:14,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 20:44:14,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396588827] [2022-11-02 20:44:14,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:14,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:44:14,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:14,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:44:14,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:44:14,604 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-02 20:44:14,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 126 transitions, 920 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:14,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:14,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-02 20:44:14,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:15,070 INFO L130 PetriNetUnfolder]: 182/564 cut-off events. [2022-11-02 20:44:15,071 INFO L131 PetriNetUnfolder]: For 2330/2334 co-relation queries the response was YES. [2022-11-02 20:44:15,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2100 conditions, 564 events. 182/564 cut-off events. For 2330/2334 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3187 event pairs, 38 based on Foata normal form. 3/558 useless extension candidates. Maximal degree in co-relation 2064. Up to 166 conditions per place. [2022-11-02 20:44:15,078 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 72 selfloop transitions, 38 changer transitions 7/158 dead transitions. [2022-11-02 20:44:15,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 158 transitions, 1313 flow [2022-11-02 20:44:15,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:44:15,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:44:15,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 795 transitions. [2022-11-02 20:44:15,086 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6527093596059114 [2022-11-02 20:44:15,087 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 795 transitions. [2022-11-02 20:44:15,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 795 transitions. [2022-11-02 20:44:15,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:15,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 795 transitions. [2022-11-02 20:44:15,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.785714285714285) internal successors, (795), 14 states have internal predecessors, (795), 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) [2022-11-02 20:44:15,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:15,098 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:15,098 INFO L175 Difference]: Start difference. First operand has 146 places, 126 transitions, 920 flow. Second operand 14 states and 795 transitions. [2022-11-02 20:44:15,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 158 transitions, 1313 flow [2022-11-02 20:44:15,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 158 transitions, 1225 flow, removed 6 selfloop flow, removed 12 redundant places. [2022-11-02 20:44:15,114 INFO L231 Difference]: Finished difference. Result has 146 places, 127 transitions, 936 flow [2022-11-02 20:44:15,114 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=936, PETRI_PLACES=146, PETRI_TRANSITIONS=127} [2022-11-02 20:44:15,115 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 69 predicate places. [2022-11-02 20:44:15,115 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 127 transitions, 936 flow [2022-11-02 20:44:15,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:15,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:15,116 INFO L208 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] [2022-11-02 20:44:15,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-02 20:44:15,116 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:15,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:15,117 INFO L85 PathProgramCache]: Analyzing trace with hash 134112017, now seen corresponding path program 20 times [2022-11-02 20:44:15,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:15,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560019211] [2022-11-02 20:44:15,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:15,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:15,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:15,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:15,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560019211] [2022-11-02 20:44:15,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560019211] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:15,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:15,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 20:44:15,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764206646] [2022-11-02 20:44:15,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:15,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:44:15,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:15,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:44:15,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:44:15,437 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-02 20:44:15,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 127 transitions, 936 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:15,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:15,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-02 20:44:15,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:15,898 INFO L130 PetriNetUnfolder]: 181/562 cut-off events. [2022-11-02 20:44:15,898 INFO L131 PetriNetUnfolder]: For 2413/2417 co-relation queries the response was YES. [2022-11-02 20:44:15,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2106 conditions, 562 events. 181/562 cut-off events. For 2413/2417 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3152 event pairs, 37 based on Foata normal form. 3/557 useless extension candidates. Maximal degree in co-relation 2069. Up to 167 conditions per place. [2022-11-02 20:44:15,905 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 36 changer transitions 9/155 dead transitions. [2022-11-02 20:44:15,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 155 transitions, 1300 flow [2022-11-02 20:44:15,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:44:15,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:44:15,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-11-02 20:44:15,911 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-11-02 20:44:15,911 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-11-02 20:44:15,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-11-02 20:44:15,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:15,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-11-02 20:44:15,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 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) [2022-11-02 20:44:15,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:15,920 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 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) [2022-11-02 20:44:15,920 INFO L175 Difference]: Start difference. First operand has 146 places, 127 transitions, 936 flow. Second operand 14 states and 792 transitions. [2022-11-02 20:44:15,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 155 transitions, 1300 flow [2022-11-02 20:44:15,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 155 transitions, 1206 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-11-02 20:44:15,935 INFO L231 Difference]: Finished difference. Result has 146 places, 124 transitions, 889 flow [2022-11-02 20:44:15,936 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=889, PETRI_PLACES=146, PETRI_TRANSITIONS=124} [2022-11-02 20:44:15,936 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 69 predicate places. [2022-11-02 20:44:15,937 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 124 transitions, 889 flow [2022-11-02 20:44:15,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 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) [2022-11-02 20:44:15,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:15,937 INFO L208 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] [2022-11-02 20:44:15,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-02 20:44:15,938 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:15,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:15,938 INFO L85 PathProgramCache]: Analyzing trace with hash -404474333, now seen corresponding path program 1 times [2022-11-02 20:44:15,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:15,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862041272] [2022-11-02 20:44:15,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:15,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:15,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:15,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862041272] [2022-11-02 20:44:15,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862041272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:15,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659026319] [2022-11-02 20:44:15,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:15,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:15,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:15,998 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:16,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:44:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:16,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:44:16,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:16,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:16,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659026319] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:16,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:44:16,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2022-11-02 20:44:16,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921779106] [2022-11-02 20:44:16,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:16,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:44:16,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:16,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:44:16,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:44:16,213 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-02 20:44:16,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 124 transitions, 889 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2022-11-02 20:44:16,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:16,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-02 20:44:16,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:16,418 INFO L130 PetriNetUnfolder]: 187/539 cut-off events. [2022-11-02 20:44:16,419 INFO L131 PetriNetUnfolder]: For 2745/2745 co-relation queries the response was YES. [2022-11-02 20:44:16,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2095 conditions, 539 events. 187/539 cut-off events. For 2745/2745 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2865 event pairs, 22 based on Foata normal form. 8/539 useless extension candidates. Maximal degree in co-relation 2059. Up to 139 conditions per place. [2022-11-02 20:44:16,426 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 92 selfloop transitions, 35 changer transitions 0/176 dead transitions. [2022-11-02 20:44:16,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 176 transitions, 1666 flow [2022-11-02 20:44:16,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:44:16,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-02 20:44:16,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2022-11-02 20:44:16,431 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2022-11-02 20:44:16,431 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2022-11-02 20:44:16,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2022-11-02 20:44:16,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:16,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2022-11-02 20:44:16,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:44:16,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 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) [2022-11-02 20:44:16,436 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 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) [2022-11-02 20:44:16,436 INFO L175 Difference]: Start difference. First operand has 146 places, 124 transitions, 889 flow. Second operand 7 states and 483 transitions. [2022-11-02 20:44:16,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 176 transitions, 1666 flow [2022-11-02 20:44:16,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 176 transitions, 1544 flow, removed 4 selfloop flow, removed 11 redundant places. [2022-11-02 20:44:16,454 INFO L231 Difference]: Finished difference. Result has 137 places, 139 transitions, 1053 flow [2022-11-02 20:44:16,454 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1053, PETRI_PLACES=137, PETRI_TRANSITIONS=139} [2022-11-02 20:44:16,455 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 60 predicate places. [2022-11-02 20:44:16,455 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 139 transitions, 1053 flow [2022-11-02 20:44:16,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2022-11-02 20:44:16,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:16,456 INFO L208 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] [2022-11-02 20:44:16,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:44:16,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:16,670 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:16,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:16,671 INFO L85 PathProgramCache]: Analyzing trace with hash 915068349, now seen corresponding path program 2 times [2022-11-02 20:44:16,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:16,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840194367] [2022-11-02 20:44:16,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:16,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:16,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:16,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:16,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:16,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840194367] [2022-11-02 20:44:16,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840194367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:16,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:16,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:44:16,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15406331] [2022-11-02 20:44:16,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:16,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:44:16,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:16,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:44:16,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:44:16,724 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-02 20:44:16,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 139 transitions, 1053 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2022-11-02 20:44:16,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:16,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-02 20:44:16,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:16,927 INFO L130 PetriNetUnfolder]: 219/661 cut-off events. [2022-11-02 20:44:16,928 INFO L131 PetriNetUnfolder]: For 3400/3403 co-relation queries the response was YES. [2022-11-02 20:44:16,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2574 conditions, 661 events. 219/661 cut-off events. For 3400/3403 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3891 event pairs, 51 based on Foata normal form. 3/656 useless extension candidates. Maximal degree in co-relation 2539. Up to 144 conditions per place. [2022-11-02 20:44:16,940 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 104 selfloop transitions, 45 changer transitions 0/198 dead transitions. [2022-11-02 20:44:16,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 198 transitions, 1840 flow [2022-11-02 20:44:16,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:44:16,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-02 20:44:16,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 561 transitions. [2022-11-02 20:44:16,942 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8060344827586207 [2022-11-02 20:44:16,943 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 561 transitions. [2022-11-02 20:44:16,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 561 transitions. [2022-11-02 20:44:16,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:16,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 561 transitions. [2022-11-02 20:44:16,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 70.125) internal successors, (561), 8 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:44:16,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 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) [2022-11-02 20:44:16,946 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 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) [2022-11-02 20:44:16,946 INFO L175 Difference]: Start difference. First operand has 137 places, 139 transitions, 1053 flow. Second operand 8 states and 561 transitions. [2022-11-02 20:44:16,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 198 transitions, 1840 flow [2022-11-02 20:44:16,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 198 transitions, 1780 flow, removed 25 selfloop flow, removed 1 redundant places. [2022-11-02 20:44:16,969 INFO L231 Difference]: Finished difference. Result has 149 places, 156 transitions, 1403 flow [2022-11-02 20:44:16,970 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1403, PETRI_PLACES=149, PETRI_TRANSITIONS=156} [2022-11-02 20:44:16,970 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 72 predicate places. [2022-11-02 20:44:16,970 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 156 transitions, 1403 flow [2022-11-02 20:44:16,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2022-11-02 20:44:16,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:16,971 INFO L208 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] [2022-11-02 20:44:16,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-02 20:44:16,973 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:16,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:16,974 INFO L85 PathProgramCache]: Analyzing trace with hash -489830307, now seen corresponding path program 1 times [2022-11-02 20:44:16,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:16,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183893250] [2022-11-02 20:44:16,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:16,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:17,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:17,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:17,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183893250] [2022-11-02 20:44:17,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183893250] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:17,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835195745] [2022-11-02 20:44:17,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:17,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:17,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:17,024 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:17,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:44:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:17,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:44:17,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:17,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:17,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:17,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835195745] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:17,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:44:17,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2022-11-02 20:44:17,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777045865] [2022-11-02 20:44:17,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:17,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:44:17,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:17,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:44:17,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:44:17,209 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-02 20:44:17,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 156 transitions, 1403 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2022-11-02 20:44:17,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:17,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-02 20:44:17,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:17,422 INFO L130 PetriNetUnfolder]: 246/777 cut-off events. [2022-11-02 20:44:17,423 INFO L131 PetriNetUnfolder]: For 4968/4974 co-relation queries the response was YES. [2022-11-02 20:44:17,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3190 conditions, 777 events. 246/777 cut-off events. For 4968/4974 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4912 event pairs, 53 based on Foata normal form. 9/779 useless extension candidates. Maximal degree in co-relation 3149. Up to 217 conditions per place. [2022-11-02 20:44:17,432 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 132 selfloop transitions, 40 changer transitions 2/223 dead transitions. [2022-11-02 20:44:17,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 223 transitions, 2367 flow [2022-11-02 20:44:17,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:44:17,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:44:17,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 429 transitions. [2022-11-02 20:44:17,434 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8218390804597702 [2022-11-02 20:44:17,434 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 429 transitions. [2022-11-02 20:44:17,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 429 transitions. [2022-11-02 20:44:17,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:17,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 429 transitions. [2022-11-02 20:44:17,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.5) internal successors, (429), 6 states have internal predecessors, (429), 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) [2022-11-02 20:44:17,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 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) [2022-11-02 20:44:17,437 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 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) [2022-11-02 20:44:17,437 INFO L175 Difference]: Start difference. First operand has 149 places, 156 transitions, 1403 flow. Second operand 6 states and 429 transitions. [2022-11-02 20:44:17,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 223 transitions, 2367 flow [2022-11-02 20:44:17,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 223 transitions, 2324 flow, removed 15 selfloop flow, removed 3 redundant places. [2022-11-02 20:44:17,467 INFO L231 Difference]: Finished difference. Result has 156 places, 171 transitions, 1711 flow [2022-11-02 20:44:17,467 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1711, PETRI_PLACES=156, PETRI_TRANSITIONS=171} [2022-11-02 20:44:17,468 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 79 predicate places. [2022-11-02 20:44:17,468 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 171 transitions, 1711 flow [2022-11-02 20:44:17,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2022-11-02 20:44:17,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:17,468 INFO L208 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] [2022-11-02 20:44:17,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:17,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-02 20:44:17,694 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:17,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:17,695 INFO L85 PathProgramCache]: Analyzing trace with hash 614691113, now seen corresponding path program 2 times [2022-11-02 20:44:17,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:17,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419395936] [2022-11-02 20:44:17,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:17,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:17,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:17,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:17,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:17,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419395936] [2022-11-02 20:44:17,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419395936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:17,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:17,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:44:17,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559920518] [2022-11-02 20:44:17,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:17,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:44:17,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:17,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:44:17,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:44:17,752 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-02 20:44:17,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 171 transitions, 1711 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2022-11-02 20:44:17,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:17,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-02 20:44:17,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:18,004 INFO L130 PetriNetUnfolder]: 276/859 cut-off events. [2022-11-02 20:44:18,006 INFO L131 PetriNetUnfolder]: For 6863/6863 co-relation queries the response was YES. [2022-11-02 20:44:18,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3778 conditions, 859 events. 276/859 cut-off events. For 6863/6863 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5408 event pairs, 38 based on Foata normal form. 11/864 useless extension candidates. Maximal degree in co-relation 3735. Up to 153 conditions per place. [2022-11-02 20:44:18,017 INFO L137 encePairwiseOnDemand]: 77/87 looper letters, 109 selfloop transitions, 98 changer transitions 2/258 dead transitions. [2022-11-02 20:44:18,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 258 transitions, 3139 flow [2022-11-02 20:44:18,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:44:18,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:44:18,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 617 transitions. [2022-11-02 20:44:18,021 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7879948914431673 [2022-11-02 20:44:18,021 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 617 transitions. [2022-11-02 20:44:18,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 617 transitions. [2022-11-02 20:44:18,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:18,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 617 transitions. [2022-11-02 20:44:18,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 68.55555555555556) internal successors, (617), 9 states have internal predecessors, (617), 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) [2022-11-02 20:44:18,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 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) [2022-11-02 20:44:18,024 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 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) [2022-11-02 20:44:18,024 INFO L175 Difference]: Start difference. First operand has 156 places, 171 transitions, 1711 flow. Second operand 9 states and 617 transitions. [2022-11-02 20:44:18,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 258 transitions, 3139 flow [2022-11-02 20:44:18,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 258 transitions, 3095 flow, removed 13 selfloop flow, removed 1 redundant places. [2022-11-02 20:44:18,068 INFO L231 Difference]: Finished difference. Result has 168 places, 216 transitions, 2693 flow [2022-11-02 20:44:18,068 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2693, PETRI_PLACES=168, PETRI_TRANSITIONS=216} [2022-11-02 20:44:18,069 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 91 predicate places. [2022-11-02 20:44:18,069 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 216 transitions, 2693 flow [2022-11-02 20:44:18,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2022-11-02 20:44:18,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:18,070 INFO L208 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] [2022-11-02 20:44:18,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-02 20:44:18,070 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:18,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:18,071 INFO L85 PathProgramCache]: Analyzing trace with hash -2090104067, now seen corresponding path program 3 times [2022-11-02 20:44:18,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:18,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851096209] [2022-11-02 20:44:18,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:18,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:18,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:18,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:18,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851096209] [2022-11-02 20:44:18,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851096209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:18,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:18,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:44:18,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626316290] [2022-11-02 20:44:18,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:18,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:44:18,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:18,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:44:18,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:44:18,126 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-02 20:44:18,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 216 transitions, 2693 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2022-11-02 20:44:18,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:18,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-02 20:44:18,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:18,387 INFO L130 PetriNetUnfolder]: 265/856 cut-off events. [2022-11-02 20:44:18,387 INFO L131 PetriNetUnfolder]: For 8498/8507 co-relation queries the response was YES. [2022-11-02 20:44:18,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4021 conditions, 856 events. 265/856 cut-off events. For 8498/8507 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5464 event pairs, 67 based on Foata normal form. 7/853 useless extension candidates. Maximal degree in co-relation 3973. Up to 197 conditions per place. [2022-11-02 20:44:18,409 INFO L137 encePairwiseOnDemand]: 81/87 looper letters, 145 selfloop transitions, 48 changer transitions 5/247 dead transitions. [2022-11-02 20:44:18,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 247 transitions, 3378 flow [2022-11-02 20:44:18,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:44:18,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-02 20:44:18,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 486 transitions. [2022-11-02 20:44:18,412 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7980295566502463 [2022-11-02 20:44:18,412 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 486 transitions. [2022-11-02 20:44:18,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 486 transitions. [2022-11-02 20:44:18,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:18,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 486 transitions. [2022-11-02 20:44:18,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.42857142857143) internal successors, (486), 7 states have internal predecessors, (486), 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) [2022-11-02 20:44:18,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 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) [2022-11-02 20:44:18,415 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 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) [2022-11-02 20:44:18,415 INFO L175 Difference]: Start difference. First operand has 168 places, 216 transitions, 2693 flow. Second operand 7 states and 486 transitions. [2022-11-02 20:44:18,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 247 transitions, 3378 flow [2022-11-02 20:44:18,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 247 transitions, 3268 flow, removed 55 selfloop flow, removed 0 redundant places. [2022-11-02 20:44:18,474 INFO L231 Difference]: Finished difference. Result has 175 places, 214 transitions, 2664 flow [2022-11-02 20:44:18,474 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2544, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2664, PETRI_PLACES=175, PETRI_TRANSITIONS=214} [2022-11-02 20:44:18,475 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 98 predicate places. [2022-11-02 20:44:18,475 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 214 transitions, 2664 flow [2022-11-02 20:44:18,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2022-11-02 20:44:18,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:18,475 INFO L208 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] [2022-11-02 20:44:18,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-02 20:44:18,476 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:18,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:18,476 INFO L85 PathProgramCache]: Analyzing trace with hash -438376403, now seen corresponding path program 4 times [2022-11-02 20:44:18,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:18,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901480854] [2022-11-02 20:44:18,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:18,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:18,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:18,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901480854] [2022-11-02 20:44:18,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901480854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:18,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:18,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:44:18,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668558482] [2022-11-02 20:44:18,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:18,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:44:18,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:18,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:44:18,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:44:18,523 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-02 20:44:18,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 214 transitions, 2664 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2022-11-02 20:44:18,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:18,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-02 20:44:18,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:18,794 INFO L130 PetriNetUnfolder]: 255/820 cut-off events. [2022-11-02 20:44:18,795 INFO L131 PetriNetUnfolder]: For 8419/8425 co-relation queries the response was YES. [2022-11-02 20:44:18,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3881 conditions, 820 events. 255/820 cut-off events. For 8419/8425 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5055 event pairs, 62 based on Foata normal form. 3/815 useless extension candidates. Maximal degree in co-relation 3831. Up to 197 conditions per place. [2022-11-02 20:44:18,806 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 135 selfloop transitions, 68 changer transitions 3/255 dead transitions. [2022-11-02 20:44:18,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 255 transitions, 3476 flow [2022-11-02 20:44:18,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:44:18,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-02 20:44:18,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 555 transitions. [2022-11-02 20:44:18,841 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7974137931034483 [2022-11-02 20:44:18,841 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 555 transitions. [2022-11-02 20:44:18,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 555 transitions. [2022-11-02 20:44:18,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:18,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 555 transitions. [2022-11-02 20:44:18,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 69.375) internal successors, (555), 8 states have internal predecessors, (555), 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) [2022-11-02 20:44:18,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 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) [2022-11-02 20:44:18,844 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 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) [2022-11-02 20:44:18,845 INFO L175 Difference]: Start difference. First operand has 175 places, 214 transitions, 2664 flow. Second operand 8 states and 555 transitions. [2022-11-02 20:44:18,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 255 transitions, 3476 flow [2022-11-02 20:44:18,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 255 transitions, 3397 flow, removed 23 selfloop flow, removed 7 redundant places. [2022-11-02 20:44:18,888 INFO L231 Difference]: Finished difference. Result has 176 places, 221 transitions, 2959 flow [2022-11-02 20:44:18,889 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2530, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2959, PETRI_PLACES=176, PETRI_TRANSITIONS=221} [2022-11-02 20:44:18,889 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 99 predicate places. [2022-11-02 20:44:18,889 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 221 transitions, 2959 flow [2022-11-02 20:44:18,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2022-11-02 20:44:18,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:18,890 INFO L208 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] [2022-11-02 20:44:18,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-02 20:44:18,891 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:18,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:18,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1478547713, now seen corresponding path program 3 times [2022-11-02 20:44:18,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:18,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560927479] [2022-11-02 20:44:18,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:18,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:18,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:18,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:18,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560927479] [2022-11-02 20:44:18,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560927479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:18,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983123617] [2022-11-02 20:44:18,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:44:18,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:18,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:18,944 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:18,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:44:19,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:44:19,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:44:19,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:44:19,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:19,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:19,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:19,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983123617] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:19,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:44:19,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2022-11-02 20:44:19,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457982731] [2022-11-02 20:44:19,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:19,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:44:19,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:19,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:44:19,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:44:19,130 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-02 20:44:19,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 221 transitions, 2959 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2022-11-02 20:44:19,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:19,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-02 20:44:19,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:19,410 INFO L130 PetriNetUnfolder]: 274/924 cut-off events. [2022-11-02 20:44:19,411 INFO L131 PetriNetUnfolder]: For 10002/10008 co-relation queries the response was YES. [2022-11-02 20:44:19,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4258 conditions, 924 events. 274/924 cut-off events. For 10002/10008 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5999 event pairs, 45 based on Foata normal form. 12/926 useless extension candidates. Maximal degree in co-relation 4210. Up to 169 conditions per place. [2022-11-02 20:44:19,423 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 122 selfloop transitions, 101 changer transitions 2/274 dead transitions. [2022-11-02 20:44:19,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 274 transitions, 3985 flow [2022-11-02 20:44:19,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:44:19,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:44:19,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 427 transitions. [2022-11-02 20:44:19,425 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8180076628352491 [2022-11-02 20:44:19,425 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 427 transitions. [2022-11-02 20:44:19,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 427 transitions. [2022-11-02 20:44:19,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:19,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 427 transitions. [2022-11-02 20:44:19,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 states have internal predecessors, (427), 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) [2022-11-02 20:44:19,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 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) [2022-11-02 20:44:19,428 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 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) [2022-11-02 20:44:19,428 INFO L175 Difference]: Start difference. First operand has 176 places, 221 transitions, 2959 flow. Second operand 6 states and 427 transitions. [2022-11-02 20:44:19,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 274 transitions, 3985 flow [2022-11-02 20:44:19,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 274 transitions, 3850 flow, removed 20 selfloop flow, removed 7 redundant places. [2022-11-02 20:44:19,479 INFO L231 Difference]: Finished difference. Result has 177 places, 238 transitions, 3491 flow [2022-11-02 20:44:19,480 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2797, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3491, PETRI_PLACES=177, PETRI_TRANSITIONS=238} [2022-11-02 20:44:19,484 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 100 predicate places. [2022-11-02 20:44:19,485 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 238 transitions, 3491 flow [2022-11-02 20:44:19,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2022-11-02 20:44:19,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:19,485 INFO L208 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] [2022-11-02 20:44:19,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:19,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-02 20:44:19,706 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:19,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:19,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1216001191, now seen corresponding path program 5 times [2022-11-02 20:44:19,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:19,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386661551] [2022-11-02 20:44:19,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:19,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:19,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:19,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386661551] [2022-11-02 20:44:19,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386661551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:19,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:19,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:44:19,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066423941] [2022-11-02 20:44:19,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:19,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:44:19,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:19,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:44:19,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:44:19,755 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-02 20:44:19,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 238 transitions, 3491 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2022-11-02 20:44:19,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:19,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-02 20:44:19,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:20,045 INFO L130 PetriNetUnfolder]: 255/845 cut-off events. [2022-11-02 20:44:20,045 INFO L131 PetriNetUnfolder]: For 11332/11350 co-relation queries the response was YES. [2022-11-02 20:44:20,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4282 conditions, 845 events. 255/845 cut-off events. For 11332/11350 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5285 event pairs, 52 based on Foata normal form. 8/843 useless extension candidates. Maximal degree in co-relation 4233. Up to 203 conditions per place. [2022-11-02 20:44:20,057 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 122 selfloop transitions, 98 changer transitions 2/271 dead transitions. [2022-11-02 20:44:20,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 271 transitions, 4175 flow [2022-11-02 20:44:20,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:44:20,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-02 20:44:20,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 568 transitions. [2022-11-02 20:44:20,059 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2022-11-02 20:44:20,059 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 568 transitions. [2022-11-02 20:44:20,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 568 transitions. [2022-11-02 20:44:20,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:20,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 568 transitions. [2022-11-02 20:44:20,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 71.0) internal successors, (568), 8 states have internal predecessors, (568), 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) [2022-11-02 20:44:20,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 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) [2022-11-02 20:44:20,063 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 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) [2022-11-02 20:44:20,063 INFO L175 Difference]: Start difference. First operand has 177 places, 238 transitions, 3491 flow. Second operand 8 states and 568 transitions. [2022-11-02 20:44:20,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 271 transitions, 4175 flow [2022-11-02 20:44:20,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 271 transitions, 4090 flow, removed 23 selfloop flow, removed 2 redundant places. [2022-11-02 20:44:20,118 INFO L231 Difference]: Finished difference. Result has 180 places, 233 transitions, 3532 flow [2022-11-02 20:44:20,118 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3253, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3532, PETRI_PLACES=180, PETRI_TRANSITIONS=233} [2022-11-02 20:44:20,121 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 103 predicate places. [2022-11-02 20:44:20,121 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 233 transitions, 3532 flow [2022-11-02 20:44:20,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2022-11-02 20:44:20,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:20,122 INFO L208 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] [2022-11-02 20:44:20,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-02 20:44:20,122 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:20,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:20,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1592299911, now seen corresponding path program 4 times [2022-11-02 20:44:20,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:20,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803943577] [2022-11-02 20:44:20,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:20,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:20,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:20,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803943577] [2022-11-02 20:44:20,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803943577] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:20,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538889850] [2022-11-02 20:44:20,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:44:20,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:20,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:20,173 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:20,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:44:20,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:44:20,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:44:20,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:44:20,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:20,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:20,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538889850] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:20,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:44:20,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2022-11-02 20:44:20,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10871819] [2022-11-02 20:44:20,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:20,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:44:20,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:20,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:44:20,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:44:20,340 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-02 20:44:20,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 233 transitions, 3532 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2022-11-02 20:44:20,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:20,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-02 20:44:20,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:20,619 INFO L130 PetriNetUnfolder]: 235/747 cut-off events. [2022-11-02 20:44:20,619 INFO L131 PetriNetUnfolder]: For 11153/11153 co-relation queries the response was YES. [2022-11-02 20:44:20,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3998 conditions, 747 events. 235/747 cut-off events. For 11153/11153 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4363 event pairs, 43 based on Foata normal form. 8/749 useless extension candidates. Maximal degree in co-relation 3950. Up to 229 conditions per place. [2022-11-02 20:44:20,629 INFO L137 encePairwiseOnDemand]: 78/87 looper letters, 137 selfloop transitions, 70 changer transitions 0/256 dead transitions. [2022-11-02 20:44:20,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 256 transitions, 4065 flow [2022-11-02 20:44:20,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:44:20,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:44:20,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 426 transitions. [2022-11-02 20:44:20,631 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2022-11-02 20:44:20,632 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 426 transitions. [2022-11-02 20:44:20,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 426 transitions. [2022-11-02 20:44:20,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:20,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 426 transitions. [2022-11-02 20:44:20,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.0) internal successors, (426), 6 states have internal predecessors, (426), 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) [2022-11-02 20:44:20,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 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) [2022-11-02 20:44:20,634 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 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) [2022-11-02 20:44:20,634 INFO L175 Difference]: Start difference. First operand has 180 places, 233 transitions, 3532 flow. Second operand 6 states and 426 transitions. [2022-11-02 20:44:20,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 256 transitions, 4065 flow [2022-11-02 20:44:20,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 256 transitions, 3871 flow, removed 23 selfloop flow, removed 6 redundant places. [2022-11-02 20:44:20,683 INFO L231 Difference]: Finished difference. Result has 181 places, 229 transitions, 3461 flow [2022-11-02 20:44:20,684 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3173, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3461, PETRI_PLACES=181, PETRI_TRANSITIONS=229} [2022-11-02 20:44:20,684 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 104 predicate places. [2022-11-02 20:44:20,685 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 229 transitions, 3461 flow [2022-11-02 20:44:20,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2022-11-02 20:44:20,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:20,685 INFO L208 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] [2022-11-02 20:44:20,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:20,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:20,898 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:20,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:20,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1032792189, now seen corresponding path program 5 times [2022-11-02 20:44:20,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:20,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396071296] [2022-11-02 20:44:20,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:20,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:20,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:20,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396071296] [2022-11-02 20:44:20,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396071296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:20,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:20,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:44:20,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172213384] [2022-11-02 20:44:20,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:20,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:44:20,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:20,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:44:20,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:44:20,948 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-02 20:44:20,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 229 transitions, 3461 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2022-11-02 20:44:20,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:20,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-02 20:44:20,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:21,209 INFO L130 PetriNetUnfolder]: 230/742 cut-off events. [2022-11-02 20:44:21,210 INFO L131 PetriNetUnfolder]: For 10830/10832 co-relation queries the response was YES. [2022-11-02 20:44:21,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3958 conditions, 742 events. 230/742 cut-off events. For 10830/10832 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4338 event pairs, 59 based on Foata normal form. 3/735 useless extension candidates. Maximal degree in co-relation 3912. Up to 198 conditions per place. [2022-11-02 20:44:21,222 INFO L137 encePairwiseOnDemand]: 81/87 looper letters, 155 selfloop transitions, 33 changer transitions 7/244 dead transitions. [2022-11-02 20:44:21,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 244 transitions, 3887 flow [2022-11-02 20:44:21,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:44:21,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-02 20:44:21,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2022-11-02 20:44:21,225 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2022-11-02 20:44:21,225 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2022-11-02 20:44:21,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2022-11-02 20:44:21,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:21,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2022-11-02 20:44:21,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:44:21,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 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) [2022-11-02 20:44:21,228 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 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) [2022-11-02 20:44:21,228 INFO L175 Difference]: Start difference. First operand has 181 places, 229 transitions, 3461 flow. Second operand 7 states and 483 transitions. [2022-11-02 20:44:21,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 244 transitions, 3887 flow [2022-11-02 20:44:21,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 244 transitions, 3834 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-11-02 20:44:21,279 INFO L231 Difference]: Finished difference. Result has 186 places, 221 transitions, 3240 flow [2022-11-02 20:44:21,279 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3315, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3240, PETRI_PLACES=186, PETRI_TRANSITIONS=221} [2022-11-02 20:44:21,280 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 109 predicate places. [2022-11-02 20:44:21,280 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 221 transitions, 3240 flow [2022-11-02 20:44:21,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2022-11-02 20:44:21,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:21,281 INFO L208 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] [2022-11-02 20:44:21,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-02 20:44:21,282 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:21,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:21,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1692301223, now seen corresponding path program 6 times [2022-11-02 20:44:21,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:21,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890359304] [2022-11-02 20:44:21,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:21,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:21,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:21,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:21,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890359304] [2022-11-02 20:44:21,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890359304] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:21,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:21,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:44:21,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664465142] [2022-11-02 20:44:21,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:21,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:44:21,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:21,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:44:21,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:44:21,333 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-02 20:44:21,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 221 transitions, 3240 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2022-11-02 20:44:21,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:21,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-02 20:44:21,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:21,595 INFO L130 PetriNetUnfolder]: 217/676 cut-off events. [2022-11-02 20:44:21,595 INFO L131 PetriNetUnfolder]: For 10141/10143 co-relation queries the response was YES. [2022-11-02 20:44:21,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3645 conditions, 676 events. 217/676 cut-off events. For 10141/10143 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3771 event pairs, 50 based on Foata normal form. 2/668 useless extension candidates. Maximal degree in co-relation 3599. Up to 198 conditions per place. [2022-11-02 20:44:21,605 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 128 selfloop transitions, 49 changer transitions 2/228 dead transitions. [2022-11-02 20:44:21,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 228 transitions, 3529 flow [2022-11-02 20:44:21,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:44:21,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-02 20:44:21,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 550 transitions. [2022-11-02 20:44:21,608 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7902298850574713 [2022-11-02 20:44:21,608 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 550 transitions. [2022-11-02 20:44:21,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 550 transitions. [2022-11-02 20:44:21,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:21,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 550 transitions. [2022-11-02 20:44:21,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 68.75) internal successors, (550), 8 states have internal predecessors, (550), 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) [2022-11-02 20:44:21,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 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) [2022-11-02 20:44:21,612 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 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) [2022-11-02 20:44:21,612 INFO L175 Difference]: Start difference. First operand has 186 places, 221 transitions, 3240 flow. Second operand 8 states and 550 transitions. [2022-11-02 20:44:21,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 228 transitions, 3529 flow [2022-11-02 20:44:21,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 228 transitions, 3295 flow, removed 12 selfloop flow, removed 9 redundant places. [2022-11-02 20:44:21,655 INFO L231 Difference]: Finished difference. Result has 180 places, 207 transitions, 2904 flow [2022-11-02 20:44:21,656 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2834, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2904, PETRI_PLACES=180, PETRI_TRANSITIONS=207} [2022-11-02 20:44:21,657 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 103 predicate places. [2022-11-02 20:44:21,657 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 207 transitions, 2904 flow [2022-11-02 20:44:21,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2022-11-02 20:44:21,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:21,658 INFO L208 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] [2022-11-02 20:44:21,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-02 20:44:21,659 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:21,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:21,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1418986181, now seen corresponding path program 6 times [2022-11-02 20:44:21,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:21,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058920752] [2022-11-02 20:44:21,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:21,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:21,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:21,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058920752] [2022-11-02 20:44:21,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058920752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:21,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:21,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:44:21,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797620237] [2022-11-02 20:44:21,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:21,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:44:21,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:21,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:44:21,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:44:21,705 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-02 20:44:21,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 207 transitions, 2904 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2022-11-02 20:44:21,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:21,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-02 20:44:21,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:21,901 INFO L130 PetriNetUnfolder]: 200/604 cut-off events. [2022-11-02 20:44:21,901 INFO L131 PetriNetUnfolder]: For 8392/8394 co-relation queries the response was YES. [2022-11-02 20:44:21,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3256 conditions, 604 events. 200/604 cut-off events. For 8392/8394 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3123 event pairs, 41 based on Foata normal form. 3/601 useless extension candidates. Maximal degree in co-relation 3216. Up to 190 conditions per place. [2022-11-02 20:44:21,910 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 111 selfloop transitions, 46 changer transitions 3/209 dead transitions. [2022-11-02 20:44:21,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 209 transitions, 3091 flow [2022-11-02 20:44:21,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:44:21,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-02 20:44:21,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 480 transitions. [2022-11-02 20:44:21,912 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7881773399014779 [2022-11-02 20:44:21,912 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 480 transitions. [2022-11-02 20:44:21,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 480 transitions. [2022-11-02 20:44:21,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:21,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 480 transitions. [2022-11-02 20:44:21,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.57142857142857) internal successors, (480), 7 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:44:21,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 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) [2022-11-02 20:44:21,915 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 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) [2022-11-02 20:44:21,915 INFO L175 Difference]: Start difference. First operand has 180 places, 207 transitions, 2904 flow. Second operand 7 states and 480 transitions. [2022-11-02 20:44:21,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 209 transitions, 3091 flow [2022-11-02 20:44:21,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 209 transitions, 2939 flow, removed 11 selfloop flow, removed 13 redundant places. [2022-11-02 20:44:21,949 INFO L231 Difference]: Finished difference. Result has 167 places, 193 transitions, 2621 flow [2022-11-02 20:44:21,949 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2557, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2621, PETRI_PLACES=167, PETRI_TRANSITIONS=193} [2022-11-02 20:44:21,950 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 90 predicate places. [2022-11-02 20:44:21,950 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 193 transitions, 2621 flow [2022-11-02 20:44:21,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2022-11-02 20:44:21,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:21,951 INFO L208 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] [2022-11-02 20:44:21,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-02 20:44:21,951 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:21,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:21,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1990008755, now seen corresponding path program 1 times [2022-11-02 20:44:21,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:21,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402081326] [2022-11-02 20:44:21,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:21,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:22,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:22,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402081326] [2022-11-02 20:44:22,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402081326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:22,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563431107] [2022-11-02 20:44:22,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:22,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:22,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:22,268 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:22,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:44:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:22,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:44:22,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:22,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:22,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:23,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563431107] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:23,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:23,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-02 20:44:23,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697743543] [2022-11-02 20:44:23,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:23,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:44:23,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:23,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:44:23,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:44:23,536 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-02 20:44:23,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 193 transitions, 2621 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 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) [2022-11-02 20:44:23,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:23,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-02 20:44:23,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:38,491 INFO L130 PetriNetUnfolder]: 994/2383 cut-off events. [2022-11-02 20:44:38,491 INFO L131 PetriNetUnfolder]: For 32240/32240 co-relation queries the response was YES. [2022-11-02 20:44:38,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13142 conditions, 2383 events. 994/2383 cut-off events. For 32240/32240 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16519 event pairs, 31 based on Foata normal form. 3/2374 useless extension candidates. Maximal degree in co-relation 13107. Up to 363 conditions per place. [2022-11-02 20:44:38,527 INFO L137 encePairwiseOnDemand]: 64/87 looper letters, 249 selfloop transitions, 865 changer transitions 17/1170 dead transitions. [2022-11-02 20:44:38,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 1170 transitions, 17248 flow [2022-11-02 20:44:38,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2022-11-02 20:44:38,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2022-11-02 20:44:38,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 11784 transitions. [2022-11-02 20:44:38,546 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.604679802955665 [2022-11-02 20:44:38,546 INFO L72 ComplementDD]: Start complementDD. Operand 224 states and 11784 transitions. [2022-11-02 20:44:38,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 224 states and 11784 transitions. [2022-11-02 20:44:38,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:38,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 224 states and 11784 transitions. [2022-11-02 20:44:38,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 225 states, 224 states have (on average 52.607142857142854) internal successors, (11784), 224 states have internal predecessors, (11784), 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) [2022-11-02 20:44:38,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 225 states, 225 states have (on average 87.0) internal successors, (19575), 225 states have internal predecessors, (19575), 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) [2022-11-02 20:44:38,608 INFO L81 ComplementDD]: Finished complementDD. Result has 225 states, 225 states have (on average 87.0) internal successors, (19575), 225 states have internal predecessors, (19575), 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) [2022-11-02 20:44:38,609 INFO L175 Difference]: Start difference. First operand has 167 places, 193 transitions, 2621 flow. Second operand 224 states and 11784 transitions. [2022-11-02 20:44:38,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 1170 transitions, 17248 flow [2022-11-02 20:44:38,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 1170 transitions, 16312 flow, removed 44 selfloop flow, removed 10 redundant places. [2022-11-02 20:44:38,733 INFO L231 Difference]: Finished difference. Result has 436 places, 1001 transitions, 15313 flow [2022-11-02 20:44:38,734 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2431, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=224, PETRI_FLOW=15313, PETRI_PLACES=436, PETRI_TRANSITIONS=1001} [2022-11-02 20:44:38,734 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 359 predicate places. [2022-11-02 20:44:38,734 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 1001 transitions, 15313 flow [2022-11-02 20:44:38,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 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) [2022-11-02 20:44:38,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:38,735 INFO L208 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] [2022-11-02 20:44:38,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:38,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-02 20:44:38,950 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:38,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:38,951 INFO L85 PathProgramCache]: Analyzing trace with hash 34652497, now seen corresponding path program 2 times [2022-11-02 20:44:38,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:38,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623155355] [2022-11-02 20:44:38,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:38,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:38,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:39,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:39,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623155355] [2022-11-02 20:44:39,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623155355] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:39,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144850738] [2022-11-02 20:44:39,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:44:39,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:39,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:39,291 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:39,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:44:39,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:44:39,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:44:39,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:44:39,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:39,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:40,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144850738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:40,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:40,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-02 20:44:40,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000228172] [2022-11-02 20:44:40,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:40,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:44:40,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:40,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:44:40,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:44:40,531 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-02 20:44:40,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 1001 transitions, 15313 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 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) [2022-11-02 20:44:40,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:40,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-02 20:44:40,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:44,966 INFO L130 PetriNetUnfolder]: 1130/3120 cut-off events. [2022-11-02 20:44:44,967 INFO L131 PetriNetUnfolder]: For 130936/130936 co-relation queries the response was YES. [2022-11-02 20:44:45,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24075 conditions, 3120 events. 1130/3120 cut-off events. For 130936/130936 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 25752 event pairs, 44 based on Foata normal form. 1/3108 useless extension candidates. Maximal degree in co-relation 23979. Up to 439 conditions per place. [2022-11-02 20:44:45,037 INFO L137 encePairwiseOnDemand]: 67/87 looper letters, 363 selfloop transitions, 771 changer transitions 45/1218 dead transitions. [2022-11-02 20:44:45,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 1218 transitions, 22294 flow [2022-11-02 20:44:45,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-02 20:44:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-11-02 20:44:45,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3489 transitions. [2022-11-02 20:44:45,043 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6266163793103449 [2022-11-02 20:44:45,043 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3489 transitions. [2022-11-02 20:44:45,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3489 transitions. [2022-11-02 20:44:45,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:45,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3489 transitions. [2022-11-02 20:44:45,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 54.515625) internal successors, (3489), 64 states have internal predecessors, (3489), 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) [2022-11-02 20:44:45,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 87.0) internal successors, (5655), 65 states have internal predecessors, (5655), 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) [2022-11-02 20:44:45,062 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 87.0) internal successors, (5655), 65 states have internal predecessors, (5655), 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) [2022-11-02 20:44:45,062 INFO L175 Difference]: Start difference. First operand has 436 places, 1001 transitions, 15313 flow. Second operand 64 states and 3489 transitions. [2022-11-02 20:44:45,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 1218 transitions, 22294 flow [2022-11-02 20:44:45,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 1218 transitions, 20815 flow, removed 486 selfloop flow, removed 14 redundant places. [2022-11-02 20:44:45,946 INFO L231 Difference]: Finished difference. Result has 497 places, 1047 transitions, 16743 flow [2022-11-02 20:44:45,948 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=14049, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=731, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=16743, PETRI_PLACES=497, PETRI_TRANSITIONS=1047} [2022-11-02 20:44:45,948 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 420 predicate places. [2022-11-02 20:44:45,948 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 1047 transitions, 16743 flow [2022-11-02 20:44:45,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 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) [2022-11-02 20:44:45,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:45,949 INFO L208 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] [2022-11-02 20:44:45,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:46,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:46,150 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:46,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:46,150 INFO L85 PathProgramCache]: Analyzing trace with hash -52915711, now seen corresponding path program 3 times [2022-11-02 20:44:46,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:46,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618228684] [2022-11-02 20:44:46,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:46,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:46,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:46,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618228684] [2022-11-02 20:44:46,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618228684] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:46,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329999376] [2022-11-02 20:44:46,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:44:46,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:46,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:46,530 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:46,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:44:46,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:44:46,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:44:46,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:44:46,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:47,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:47,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:47,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329999376] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:47,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:47,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-02 20:44:47,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241867678] [2022-11-02 20:44:47,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:47,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:44:47,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:47,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:44:47,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:44:47,733 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-02 20:44:47,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 1047 transitions, 16743 flow. Second operand has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 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) [2022-11-02 20:44:47,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:47,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-02 20:44:47,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:51,942 INFO L130 PetriNetUnfolder]: 1111/3084 cut-off events. [2022-11-02 20:44:51,942 INFO L131 PetriNetUnfolder]: For 151354/151354 co-relation queries the response was YES. [2022-11-02 20:44:51,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25258 conditions, 3084 events. 1111/3084 cut-off events. For 151354/151354 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 25581 event pairs, 62 based on Foata normal form. 2/3056 useless extension candidates. Maximal degree in co-relation 25152. Up to 429 conditions per place. [2022-11-02 20:44:51,996 INFO L137 encePairwiseOnDemand]: 67/87 looper letters, 342 selfloop transitions, 783 changer transitions 31/1195 dead transitions. [2022-11-02 20:44:51,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 1195 transitions, 22600 flow [2022-11-02 20:44:51,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-02 20:44:51,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-11-02 20:44:52,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 3577 transitions. [2022-11-02 20:44:52,002 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6229536746778126 [2022-11-02 20:44:52,003 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 3577 transitions. [2022-11-02 20:44:52,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 3577 transitions. [2022-11-02 20:44:52,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:52,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 3577 transitions. [2022-11-02 20:44:52,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 54.196969696969695) internal successors, (3577), 66 states have internal predecessors, (3577), 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) [2022-11-02 20:44:52,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 87.0) internal successors, (5829), 67 states have internal predecessors, (5829), 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) [2022-11-02 20:44:52,019 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 87.0) internal successors, (5829), 67 states have internal predecessors, (5829), 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) [2022-11-02 20:44:52,019 INFO L175 Difference]: Start difference. First operand has 497 places, 1047 transitions, 16743 flow. Second operand 66 states and 3577 transitions. [2022-11-02 20:44:52,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 1195 transitions, 22600 flow [2022-11-02 20:44:52,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 1195 transitions, 20818 flow, removed 165 selfloop flow, removed 43 redundant places. [2022-11-02 20:44:52,774 INFO L231 Difference]: Finished difference. Result has 527 places, 1064 transitions, 17258 flow [2022-11-02 20:44:52,776 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=15074, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1047, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=767, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=17258, PETRI_PLACES=527, PETRI_TRANSITIONS=1064} [2022-11-02 20:44:52,776 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 450 predicate places. [2022-11-02 20:44:52,776 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 1064 transitions, 17258 flow [2022-11-02 20:44:52,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 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) [2022-11-02 20:44:52,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:52,777 INFO L208 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] [2022-11-02 20:44:52,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:53,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-02 20:44:53,002 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:53,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:53,003 INFO L85 PathProgramCache]: Analyzing trace with hash -930373283, now seen corresponding path program 4 times [2022-11-02 20:44:53,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:53,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599437575] [2022-11-02 20:44:53,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:53,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:53,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:53,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599437575] [2022-11-02 20:44:53,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599437575] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:53,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10882948] [2022-11-02 20:44:53,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:44:53,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:53,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:53,270 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:53,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:44:53,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:44:53,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:44:53,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 20:44:53,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:53,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:53,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:54,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10882948] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:54,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:54,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-11-02 20:44:54,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000834087] [2022-11-02 20:44:54,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:54,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 20:44:54,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:54,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 20:44:54,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:44:54,302 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-02 20:44:54,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 1064 transitions, 17258 flow. Second operand has 33 states, 33 states have (on average 50.93939393939394) internal successors, (1681), 33 states have internal predecessors, (1681), 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) [2022-11-02 20:44:54,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:54,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-02 20:44:54,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:56,947 INFO L130 PetriNetUnfolder]: 1109/3154 cut-off events. [2022-11-02 20:44:56,947 INFO L131 PetriNetUnfolder]: For 162714/162714 co-relation queries the response was YES. [2022-11-02 20:44:56,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25951 conditions, 3154 events. 1109/3154 cut-off events. For 162714/162714 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 26705 event pairs, 92 based on Foata normal form. 1/3125 useless extension candidates. Maximal degree in co-relation 25837. Up to 512 conditions per place. [2022-11-02 20:44:57,094 INFO L137 encePairwiseOnDemand]: 69/87 looper letters, 659 selfloop transitions, 462 changer transitions 23/1183 dead transitions. [2022-11-02 20:44:57,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 1183 transitions, 22338 flow [2022-11-02 20:44:57,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-02 20:44:57,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-02 20:44:57,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2107 transitions. [2022-11-02 20:44:57,099 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6373260738052027 [2022-11-02 20:44:57,099 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2107 transitions. [2022-11-02 20:44:57,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2107 transitions. [2022-11-02 20:44:57,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:57,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2107 transitions. [2022-11-02 20:44:57,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.44736842105263) internal successors, (2107), 38 states have internal predecessors, (2107), 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) [2022-11-02 20:44:57,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 87.0) internal successors, (3393), 39 states have internal predecessors, (3393), 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) [2022-11-02 20:44:57,108 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 87.0) internal successors, (3393), 39 states have internal predecessors, (3393), 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) [2022-11-02 20:44:57,108 INFO L175 Difference]: Start difference. First operand has 527 places, 1064 transitions, 17258 flow. Second operand 38 states and 2107 transitions. [2022-11-02 20:44:57,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 1183 transitions, 22338 flow [2022-11-02 20:44:58,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 1183 transitions, 20592 flow, removed 134 selfloop flow, removed 52 redundant places. [2022-11-02 20:44:58,249 INFO L231 Difference]: Finished difference. Result has 510 places, 1074 transitions, 16764 flow [2022-11-02 20:44:58,250 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=15629, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1064, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=448, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=16764, PETRI_PLACES=510, PETRI_TRANSITIONS=1074} [2022-11-02 20:44:58,251 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 433 predicate places. [2022-11-02 20:44:58,251 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 1074 transitions, 16764 flow [2022-11-02 20:44:58,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.93939393939394) internal successors, (1681), 33 states have internal predecessors, (1681), 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) [2022-11-02 20:44:58,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:58,252 INFO L208 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] [2022-11-02 20:44:58,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:58,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-02 20:44:58,466 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:58,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:58,467 INFO L85 PathProgramCache]: Analyzing trace with hash -854241643, now seen corresponding path program 5 times [2022-11-02 20:44:58,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:58,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852549690] [2022-11-02 20:44:58,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:58,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:58,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:58,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:58,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852549690] [2022-11-02 20:44:58,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852549690] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:58,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094821334] [2022-11-02 20:44:58,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:44:58,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:58,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:58,769 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:58,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:44:58,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:44:58,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:44:58,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:44:58,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:59,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:44:59,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094821334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:59,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:44:59,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [16] total 25 [2022-11-02 20:44:59,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804946359] [2022-11-02 20:44:59,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:59,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:44:59,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:59,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:44:59,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:44:59,251 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-02 20:44:59,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 1074 transitions, 16764 flow. Second operand has 15 states, 15 states have (on average 52.93333333333333) internal successors, (794), 15 states have internal predecessors, (794), 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) [2022-11-02 20:44:59,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:59,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-02 20:44:59,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:01,017 INFO L130 PetriNetUnfolder]: 1115/3155 cut-off events. [2022-11-02 20:45:01,017 INFO L131 PetriNetUnfolder]: For 151176/151176 co-relation queries the response was YES. [2022-11-02 20:45:01,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25303 conditions, 3155 events. 1115/3155 cut-off events. For 151176/151176 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 26534 event pairs, 96 based on Foata normal form. 3/3120 useless extension candidates. Maximal degree in co-relation 25190. Up to 952 conditions per place. [2022-11-02 20:45:01,064 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 604 selfloop transitions, 556 changer transitions 21/1222 dead transitions. [2022-11-02 20:45:01,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 1222 transitions, 21741 flow [2022-11-02 20:45:01,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:45:01,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-02 20:45:01,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 979 transitions. [2022-11-02 20:45:01,067 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6619337390128465 [2022-11-02 20:45:01,067 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 979 transitions. [2022-11-02 20:45:01,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 979 transitions. [2022-11-02 20:45:01,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:01,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 979 transitions. [2022-11-02 20:45:01,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 57.588235294117645) internal successors, (979), 17 states have internal predecessors, (979), 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) [2022-11-02 20:45:01,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 87.0) internal successors, (1566), 18 states have internal predecessors, (1566), 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) [2022-11-02 20:45:01,074 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 87.0) internal successors, (1566), 18 states have internal predecessors, (1566), 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) [2022-11-02 20:45:01,074 INFO L175 Difference]: Start difference. First operand has 510 places, 1074 transitions, 16764 flow. Second operand 17 states and 979 transitions. [2022-11-02 20:45:01,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 1222 transitions, 21741 flow [2022-11-02 20:45:01,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 1222 transitions, 20950 flow, removed 37 selfloop flow, removed 20 redundant places. [2022-11-02 20:45:01,983 INFO L231 Difference]: Finished difference. Result has 506 places, 1130 transitions, 18148 flow [2022-11-02 20:45:01,984 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=16001, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=499, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=18148, PETRI_PLACES=506, PETRI_TRANSITIONS=1130} [2022-11-02 20:45:01,984 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 429 predicate places. [2022-11-02 20:45:01,985 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 1130 transitions, 18148 flow [2022-11-02 20:45:01,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.93333333333333) internal successors, (794), 15 states have internal predecessors, (794), 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) [2022-11-02 20:45:01,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:01,985 INFO L208 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] [2022-11-02 20:45:02,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:02,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-02 20:45:02,188 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:02,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:02,188 INFO L85 PathProgramCache]: Analyzing trace with hash -2062019199, now seen corresponding path program 6 times [2022-11-02 20:45:02,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:02,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989354403] [2022-11-02 20:45:02,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:02,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:02,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:02,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:02,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989354403] [2022-11-02 20:45:02,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989354403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:02,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062865014] [2022-11-02 20:45:02,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:45:02,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:02,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:02,452 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:02,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:45:02,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-02 20:45:02,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:45:02,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:45:02,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:03,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:03,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062865014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:03,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:03,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-02 20:45:03,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205812749] [2022-11-02 20:45:03,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:03,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:45:03,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:03,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:45:03,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:45:03,651 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-02 20:45:03,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 1130 transitions, 18148 flow. Second operand has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 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) [2022-11-02 20:45:03,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:03,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-02 20:45:03,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:08,939 INFO L130 PetriNetUnfolder]: 1212/3435 cut-off events. [2022-11-02 20:45:08,939 INFO L131 PetriNetUnfolder]: For 183116/183116 co-relation queries the response was YES. [2022-11-02 20:45:09,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28991 conditions, 3435 events. 1212/3435 cut-off events. For 183116/183116 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 29512 event pairs, 71 based on Foata normal form. 2/3403 useless extension candidates. Maximal degree in co-relation 28876. Up to 418 conditions per place. [2022-11-02 20:45:09,128 INFO L137 encePairwiseOnDemand]: 66/87 looper letters, 361 selfloop transitions, 951 changer transitions 23/1374 dead transitions. [2022-11-02 20:45:09,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 1374 transitions, 27061 flow [2022-11-02 20:45:09,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-11-02 20:45:09,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2022-11-02 20:45:09,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 4736 transitions. [2022-11-02 20:45:09,135 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6185997910135841 [2022-11-02 20:45:09,135 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 4736 transitions. [2022-11-02 20:45:09,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 4736 transitions. [2022-11-02 20:45:09,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:09,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 4736 transitions. [2022-11-02 20:45:09,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 53.81818181818182) internal successors, (4736), 88 states have internal predecessors, (4736), 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) [2022-11-02 20:45:09,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 87.0) internal successors, (7743), 89 states have internal predecessors, (7743), 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) [2022-11-02 20:45:09,153 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 87.0) internal successors, (7743), 89 states have internal predecessors, (7743), 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) [2022-11-02 20:45:09,154 INFO L175 Difference]: Start difference. First operand has 506 places, 1130 transitions, 18148 flow. Second operand 88 states and 4736 transitions. [2022-11-02 20:45:09,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 1374 transitions, 27061 flow [2022-11-02 20:45:10,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 1374 transitions, 26412 flow, removed 203 selfloop flow, removed 6 redundant places. [2022-11-02 20:45:10,335 INFO L231 Difference]: Finished difference. Result has 604 places, 1225 transitions, 21633 flow [2022-11-02 20:45:10,337 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=17819, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=854, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=21633, PETRI_PLACES=604, PETRI_TRANSITIONS=1225} [2022-11-02 20:45:10,339 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 527 predicate places. [2022-11-02 20:45:10,339 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 1225 transitions, 21633 flow [2022-11-02 20:45:10,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 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) [2022-11-02 20:45:10,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:10,340 INFO L208 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] [2022-11-02 20:45:10,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:10,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-02 20:45:10,554 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:10,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:10,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1531418965, now seen corresponding path program 7 times [2022-11-02 20:45:10,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:10,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194334156] [2022-11-02 20:45:10,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:10,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:10,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:10,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:10,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194334156] [2022-11-02 20:45:10,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194334156] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:10,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878824341] [2022-11-02 20:45:10,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:45:10,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:10,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:10,893 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:10,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:45:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:10,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:45:10,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:11,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:11,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878824341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:11,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:11,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-02 20:45:11,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244464735] [2022-11-02 20:45:11,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:11,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:45:11,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:11,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:45:11,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:45:11,928 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-02 20:45:11,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 1225 transitions, 21633 flow. Second operand has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 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) [2022-11-02 20:45:11,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:11,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-02 20:45:11,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:15,833 INFO L130 PetriNetUnfolder]: 1195/3496 cut-off events. [2022-11-02 20:45:15,833 INFO L131 PetriNetUnfolder]: For 184099/184099 co-relation queries the response was YES. [2022-11-02 20:45:15,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30059 conditions, 3496 events. 1195/3496 cut-off events. For 184099/184099 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 30461 event pairs, 59 based on Foata normal form. 1/3470 useless extension candidates. Maximal degree in co-relation 29929. Up to 471 conditions per place. [2022-11-02 20:45:15,892 INFO L137 encePairwiseOnDemand]: 66/87 looper letters, 441 selfloop transitions, 827 changer transitions 51/1358 dead transitions. [2022-11-02 20:45:15,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 655 places, 1358 transitions, 28358 flow [2022-11-02 20:45:15,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-02 20:45:15,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-11-02 20:45:15,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3348 transitions. [2022-11-02 20:45:15,898 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6308648954211419 [2022-11-02 20:45:15,898 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3348 transitions. [2022-11-02 20:45:15,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3348 transitions. [2022-11-02 20:45:15,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:15,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3348 transitions. [2022-11-02 20:45:15,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 54.885245901639344) internal successors, (3348), 61 states have internal predecessors, (3348), 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) [2022-11-02 20:45:15,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 87.0) internal successors, (5394), 62 states have internal predecessors, (5394), 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) [2022-11-02 20:45:15,911 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 87.0) internal successors, (5394), 62 states have internal predecessors, (5394), 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) [2022-11-02 20:45:15,911 INFO L175 Difference]: Start difference. First operand has 604 places, 1225 transitions, 21633 flow. Second operand 61 states and 3348 transitions. [2022-11-02 20:45:15,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 655 places, 1358 transitions, 28358 flow [2022-11-02 20:45:17,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 608 places, 1358 transitions, 27129 flow, removed 50 selfloop flow, removed 47 redundant places. [2022-11-02 20:45:17,469 INFO L231 Difference]: Finished difference. Result has 612 places, 1188 transitions, 21252 flow [2022-11-02 20:45:17,470 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=20450, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=827, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=21252, PETRI_PLACES=612, PETRI_TRANSITIONS=1188} [2022-11-02 20:45:17,471 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 535 predicate places. [2022-11-02 20:45:17,471 INFO L495 AbstractCegarLoop]: Abstraction has has 612 places, 1188 transitions, 21252 flow [2022-11-02 20:45:17,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 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) [2022-11-02 20:45:17,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:17,472 INFO L208 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] [2022-11-02 20:45:17,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:17,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-02 20:45:17,686 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:17,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:17,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1894486363, now seen corresponding path program 8 times [2022-11-02 20:45:17,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:17,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801074903] [2022-11-02 20:45:17,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:17,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:18,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:18,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801074903] [2022-11-02 20:45:18,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801074903] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:18,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064857331] [2022-11-02 20:45:18,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:45:18,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:18,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:18,023 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:18,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:45:18,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:45:18,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:45:18,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:45:18,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:18,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:18,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:19,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064857331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:19,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:19,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-02 20:45:19,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623926818] [2022-11-02 20:45:19,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:19,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:45:19,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:19,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:45:19,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:45:19,257 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-02 20:45:19,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 1188 transitions, 21252 flow. Second operand has 34 states, 34 states have (on average 50.8235294117647) internal successors, (1728), 34 states have internal predecessors, (1728), 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) [2022-11-02 20:45:19,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:19,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-02 20:45:19,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:28,932 INFO L130 PetriNetUnfolder]: 1201/3444 cut-off events. [2022-11-02 20:45:28,932 INFO L131 PetriNetUnfolder]: For 187614/187614 co-relation queries the response was YES. [2022-11-02 20:45:28,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30622 conditions, 3444 events. 1201/3444 cut-off events. For 187614/187614 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 29739 event pairs, 82 based on Foata normal form. 4/3402 useless extension candidates. Maximal degree in co-relation 30494. Up to 748 conditions per place. [2022-11-02 20:45:28,986 INFO L137 encePairwiseOnDemand]: 64/87 looper letters, 315 selfloop transitions, 981 changer transitions 25/1360 dead transitions. [2022-11-02 20:45:28,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 738 places, 1360 transitions, 28870 flow [2022-11-02 20:45:28,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-11-02 20:45:28,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2022-11-02 20:45:28,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 7841 transitions. [2022-11-02 20:45:28,997 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6089624106865487 [2022-11-02 20:45:28,997 INFO L72 ComplementDD]: Start complementDD. Operand 148 states and 7841 transitions. [2022-11-02 20:45:28,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 148 states and 7841 transitions. [2022-11-02 20:45:29,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:29,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 148 states and 7841 transitions. [2022-11-02 20:45:29,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 149 states, 148 states have (on average 52.979729729729726) internal successors, (7841), 148 states have internal predecessors, (7841), 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) [2022-11-02 20:45:29,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 149 states, 149 states have (on average 87.0) internal successors, (12963), 149 states have internal predecessors, (12963), 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) [2022-11-02 20:45:29,026 INFO L81 ComplementDD]: Finished complementDD. Result has 149 states, 149 states have (on average 87.0) internal successors, (12963), 149 states have internal predecessors, (12963), 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) [2022-11-02 20:45:29,027 INFO L175 Difference]: Start difference. First operand has 612 places, 1188 transitions, 21252 flow. Second operand 148 states and 7841 transitions. [2022-11-02 20:45:29,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 738 places, 1360 transitions, 28870 flow [2022-11-02 20:45:30,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 681 places, 1360 transitions, 27204 flow, removed 63 selfloop flow, removed 57 redundant places. [2022-11-02 20:45:30,392 INFO L231 Difference]: Finished difference. Result has 697 places, 1221 transitions, 22621 flow [2022-11-02 20:45:30,393 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=19738, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=947, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=148, PETRI_FLOW=22621, PETRI_PLACES=697, PETRI_TRANSITIONS=1221} [2022-11-02 20:45:30,395 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 620 predicate places. [2022-11-02 20:45:30,396 INFO L495 AbstractCegarLoop]: Abstraction has has 697 places, 1221 transitions, 22621 flow [2022-11-02 20:45:30,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.8235294117647) internal successors, (1728), 34 states have internal predecessors, (1728), 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) [2022-11-02 20:45:30,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:30,396 INFO L208 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] [2022-11-02 20:45:30,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:30,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:30,622 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:30,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:30,623 INFO L85 PathProgramCache]: Analyzing trace with hash 761893121, now seen corresponding path program 9 times [2022-11-02 20:45:30,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:30,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325552432] [2022-11-02 20:45:30,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:30,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:30,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:30,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325552432] [2022-11-02 20:45:30,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325552432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:30,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297991182] [2022-11-02 20:45:30,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:45:30,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:30,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:30,875 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:30,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:45:30,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:45:30,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:45:30,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:45:30,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:31,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:31,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297991182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:31,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:31,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-02 20:45:31,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82799033] [2022-11-02 20:45:31,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:31,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:45:31,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:31,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:45:31,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:45:31,909 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-02 20:45:31,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 697 places, 1221 transitions, 22621 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 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) [2022-11-02 20:45:31,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:31,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-02 20:45:31,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:40,838 INFO L130 PetriNetUnfolder]: 1231/3500 cut-off events. [2022-11-02 20:45:40,838 INFO L131 PetriNetUnfolder]: For 190181/190181 co-relation queries the response was YES. [2022-11-02 20:45:40,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31919 conditions, 3500 events. 1231/3500 cut-off events. For 190181/190181 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 30462 event pairs, 91 based on Foata normal form. 3/3455 useless extension candidates. Maximal degree in co-relation 31784. Up to 832 conditions per place. [2022-11-02 20:45:40,914 INFO L137 encePairwiseOnDemand]: 65/87 looper letters, 283 selfloop transitions, 1017 changer transitions 30/1369 dead transitions. [2022-11-02 20:45:40,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 834 places, 1369 transitions, 29173 flow [2022-11-02 20:45:40,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-11-02 20:45:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2022-11-02 20:45:40,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 7705 transitions. [2022-11-02 20:45:40,929 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6065973862383877 [2022-11-02 20:45:40,929 INFO L72 ComplementDD]: Start complementDD. Operand 146 states and 7705 transitions. [2022-11-02 20:45:40,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 146 states and 7705 transitions. [2022-11-02 20:45:40,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:40,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 146 states and 7705 transitions. [2022-11-02 20:45:40,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 147 states, 146 states have (on average 52.773972602739725) internal successors, (7705), 146 states have internal predecessors, (7705), 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) [2022-11-02 20:45:40,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 147 states, 147 states have (on average 87.0) internal successors, (12789), 147 states have internal predecessors, (12789), 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) [2022-11-02 20:45:40,965 INFO L81 ComplementDD]: Finished complementDD. Result has 147 states, 147 states have (on average 87.0) internal successors, (12789), 147 states have internal predecessors, (12789), 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) [2022-11-02 20:45:40,966 INFO L175 Difference]: Start difference. First operand has 697 places, 1221 transitions, 22621 flow. Second operand 146 states and 7705 transitions. [2022-11-02 20:45:40,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 834 places, 1369 transitions, 29173 flow [2022-11-02 20:45:42,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 720 places, 1369 transitions, 27894 flow, removed 41 selfloop flow, removed 114 redundant places. [2022-11-02 20:45:42,097 INFO L231 Difference]: Finished difference. Result has 737 places, 1240 transitions, 24112 flow [2022-11-02 20:45:42,098 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=21371, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=999, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=146, PETRI_FLOW=24112, PETRI_PLACES=737, PETRI_TRANSITIONS=1240} [2022-11-02 20:45:42,099 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 660 predicate places. [2022-11-02 20:45:42,099 INFO L495 AbstractCegarLoop]: Abstraction has has 737 places, 1240 transitions, 24112 flow [2022-11-02 20:45:42,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 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) [2022-11-02 20:45:42,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:42,100 INFO L208 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] [2022-11-02 20:45:42,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:42,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:42,314 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:42,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:42,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1861006475, now seen corresponding path program 10 times [2022-11-02 20:45:42,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:42,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140964180] [2022-11-02 20:45:42,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:42,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:42,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:42,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:42,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140964180] [2022-11-02 20:45:42,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140964180] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:42,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791229573] [2022-11-02 20:45:42,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:45:42,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:42,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:42,578 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:42,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:45:42,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:45:42,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:45:42,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 20:45:42,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:43,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:43,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791229573] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:43,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:43,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-11-02 20:45:43,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966654257] [2022-11-02 20:45:43,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:43,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 20:45:43,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:43,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 20:45:43,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:45:43,393 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-02 20:45:43,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 1240 transitions, 24112 flow. Second operand has 33 states, 33 states have (on average 50.75757575757576) internal successors, (1675), 33 states have internal predecessors, (1675), 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) [2022-11-02 20:45:43,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:43,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-02 20:45:43,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:49,098 INFO L130 PetriNetUnfolder]: 1288/3616 cut-off events. [2022-11-02 20:45:49,098 INFO L131 PetriNetUnfolder]: For 204737/204737 co-relation queries the response was YES. [2022-11-02 20:45:49,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34205 conditions, 3616 events. 1288/3616 cut-off events. For 204737/204737 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 31299 event pairs, 149 based on Foata normal form. 1/3561 useless extension candidates. Maximal degree in co-relation 34061. Up to 949 conditions per place. [2022-11-02 20:45:49,168 INFO L137 encePairwiseOnDemand]: 67/87 looper letters, 608 selfloop transitions, 793 changer transitions 36/1476 dead transitions. [2022-11-02 20:45:49,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 827 places, 1476 transitions, 32028 flow [2022-11-02 20:45:49,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-02 20:45:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2022-11-02 20:45:49,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 5385 transitions. [2022-11-02 20:45:49,174 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6128371457835439 [2022-11-02 20:45:49,174 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 5385 transitions. [2022-11-02 20:45:49,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 5385 transitions. [2022-11-02 20:45:49,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:49,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 5385 transitions. [2022-11-02 20:45:49,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 53.31683168316832) internal successors, (5385), 101 states have internal predecessors, (5385), 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) [2022-11-02 20:45:49,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 87.0) internal successors, (8874), 102 states have internal predecessors, (8874), 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) [2022-11-02 20:45:49,193 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 87.0) internal successors, (8874), 102 states have internal predecessors, (8874), 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) [2022-11-02 20:45:49,193 INFO L175 Difference]: Start difference. First operand has 737 places, 1240 transitions, 24112 flow. Second operand 101 states and 5385 transitions. [2022-11-02 20:45:49,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 827 places, 1476 transitions, 32028 flow [2022-11-02 20:45:50,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 702 places, 1476 transitions, 30066 flow, removed 46 selfloop flow, removed 125 redundant places. [2022-11-02 20:45:50,952 INFO L231 Difference]: Finished difference. Result has 722 places, 1346 transitions, 25861 flow [2022-11-02 20:45:50,953 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=22444, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=685, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=25861, PETRI_PLACES=722, PETRI_TRANSITIONS=1346} [2022-11-02 20:45:50,953 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 645 predicate places. [2022-11-02 20:45:50,953 INFO L495 AbstractCegarLoop]: Abstraction has has 722 places, 1346 transitions, 25861 flow [2022-11-02 20:45:50,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.75757575757576) internal successors, (1675), 33 states have internal predecessors, (1675), 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) [2022-11-02 20:45:50,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:50,954 INFO L208 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] [2022-11-02 20:45:50,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-02 20:45:51,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:51,156 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:51,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:51,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1012667775, now seen corresponding path program 11 times [2022-11-02 20:45:51,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:51,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312457517] [2022-11-02 20:45:51,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:51,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:51,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:51,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312457517] [2022-11-02 20:45:51,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312457517] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:51,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502667984] [2022-11-02 20:45:51,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:45:51,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:51,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:51,443 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:51,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:45:51,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:45:51,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:45:51,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:45:51,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:51,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:45:51,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502667984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:45:51,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:45:51,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [16] total 25 [2022-11-02 20:45:51,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879678001] [2022-11-02 20:45:51,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:45:51,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:45:51,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:51,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:45:51,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:45:51,925 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-02 20:45:51,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 722 places, 1346 transitions, 25861 flow. Second operand has 15 states, 15 states have (on average 52.93333333333333) internal successors, (794), 15 states have internal predecessors, (794), 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) [2022-11-02 20:45:51,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:51,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-02 20:45:51,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:54,649 INFO L130 PetriNetUnfolder]: 1455/3984 cut-off events. [2022-11-02 20:45:54,649 INFO L131 PetriNetUnfolder]: For 240046/240046 co-relation queries the response was YES. [2022-11-02 20:45:54,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38513 conditions, 3984 events. 1455/3984 cut-off events. For 240046/240046 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 34556 event pairs, 146 based on Foata normal form. 6/3927 useless extension candidates. Maximal degree in co-relation 38358. Up to 1222 conditions per place. [2022-11-02 20:45:54,737 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 412 selfloop transitions, 1245 changer transitions 19/1717 dead transitions. [2022-11-02 20:45:54,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 743 places, 1717 transitions, 36735 flow [2022-11-02 20:45:54,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-02 20:45:54,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-02 20:45:54,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1784 transitions. [2022-11-02 20:45:54,739 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6408045977011494 [2022-11-02 20:45:54,740 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1784 transitions. [2022-11-02 20:45:54,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1784 transitions. [2022-11-02 20:45:54,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:54,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1784 transitions. [2022-11-02 20:45:54,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.75) internal successors, (1784), 32 states have internal predecessors, (1784), 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) [2022-11-02 20:45:54,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 87.0) internal successors, (2871), 33 states have internal predecessors, (2871), 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) [2022-11-02 20:45:54,746 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 87.0) internal successors, (2871), 33 states have internal predecessors, (2871), 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) [2022-11-02 20:45:54,746 INFO L175 Difference]: Start difference. First operand has 722 places, 1346 transitions, 25861 flow. Second operand 32 states and 1784 transitions. [2022-11-02 20:45:54,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 743 places, 1717 transitions, 36735 flow [2022-11-02 20:45:56,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 704 places, 1717 transitions, 35186 flow, removed 155 selfloop flow, removed 39 redundant places. [2022-11-02 20:45:56,737 INFO L231 Difference]: Finished difference. Result has 724 places, 1651 transitions, 34442 flow [2022-11-02 20:45:56,738 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=24815, PETRI_DIFFERENCE_MINUEND_PLACES=673, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=944, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=34442, PETRI_PLACES=724, PETRI_TRANSITIONS=1651} [2022-11-02 20:45:56,738 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 647 predicate places. [2022-11-02 20:45:56,738 INFO L495 AbstractCegarLoop]: Abstraction has has 724 places, 1651 transitions, 34442 flow [2022-11-02 20:45:56,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.93333333333333) internal successors, (794), 15 states have internal predecessors, (794), 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) [2022-11-02 20:45:56,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:56,739 INFO L208 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] [2022-11-02 20:45:56,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:56,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-02 20:45:56,939 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:56,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:56,940 INFO L85 PathProgramCache]: Analyzing trace with hash -113282787, now seen corresponding path program 12 times [2022-11-02 20:45:56,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:56,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441884239] [2022-11-02 20:45:56,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:56,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:57,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:57,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441884239] [2022-11-02 20:45:57,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441884239] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:57,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193166462] [2022-11-02 20:45:57,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:45:57,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:57,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:57,198 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:57,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:45:57,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-02 20:45:57,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:45:57,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:45:57,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:57,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:58,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193166462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:58,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:58,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-11-02 20:45:58,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494061008] [2022-11-02 20:45:58,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:58,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 20:45:58,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:58,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 20:45:58,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:45:58,048 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-02 20:45:58,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 724 places, 1651 transitions, 34442 flow. Second operand has 33 states, 33 states have (on average 50.90909090909091) internal successors, (1680), 33 states have internal predecessors, (1680), 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) [2022-11-02 20:45:58,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:58,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-02 20:45:58,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:46:02,326 INFO L130 PetriNetUnfolder]: 1548/4364 cut-off events. [2022-11-02 20:46:02,326 INFO L131 PetriNetUnfolder]: For 305207/305207 co-relation queries the response was YES. [2022-11-02 20:46:02,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44538 conditions, 4364 events. 1548/4364 cut-off events. For 305207/305207 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 39644 event pairs, 72 based on Foata normal form. 4/4339 useless extension candidates. Maximal degree in co-relation 44370. Up to 797 conditions per place. [2022-11-02 20:46:02,507 INFO L137 encePairwiseOnDemand]: 69/87 looper letters, 422 selfloop transitions, 1282 changer transitions 78/1821 dead transitions. [2022-11-02 20:46:02,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 774 places, 1821 transitions, 42512 flow [2022-11-02 20:46:02,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-02 20:46:02,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-11-02 20:46:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 2906 transitions. [2022-11-02 20:46:02,513 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6185610898254577 [2022-11-02 20:46:02,514 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 2906 transitions. [2022-11-02 20:46:02,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 2906 transitions. [2022-11-02 20:46:02,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:46:02,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 2906 transitions. [2022-11-02 20:46:02,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 53.81481481481482) internal successors, (2906), 54 states have internal predecessors, (2906), 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) [2022-11-02 20:46:02,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 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) [2022-11-02 20:46:02,524 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 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) [2022-11-02 20:46:02,524 INFO L175 Difference]: Start difference. First operand has 724 places, 1651 transitions, 34442 flow. Second operand 54 states and 2906 transitions. [2022-11-02 20:46:02,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 774 places, 1821 transitions, 42512 flow [2022-11-02 20:46:06,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 763 places, 1821 transitions, 40798 flow, removed 282 selfloop flow, removed 11 redundant places. [2022-11-02 20:46:06,090 INFO L231 Difference]: Finished difference. Result has 776 places, 1682 transitions, 37157 flow [2022-11-02 20:46:06,091 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=32943, PETRI_DIFFERENCE_MINUEND_PLACES=710, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=37157, PETRI_PLACES=776, PETRI_TRANSITIONS=1682} [2022-11-02 20:46:06,092 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 699 predicate places. [2022-11-02 20:46:06,092 INFO L495 AbstractCegarLoop]: Abstraction has has 776 places, 1682 transitions, 37157 flow [2022-11-02 20:46:06,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.90909090909091) internal successors, (1680), 33 states have internal predecessors, (1680), 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) [2022-11-02 20:46:06,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:06,093 INFO L208 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] [2022-11-02 20:46:06,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:46:06,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-02 20:46:06,318 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:46:06,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:06,318 INFO L85 PathProgramCache]: Analyzing trace with hash 467141591, now seen corresponding path program 13 times [2022-11-02 20:46:06,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:06,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70798330] [2022-11-02 20:46:06,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:06,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:06,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:06,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70798330] [2022-11-02 20:46:06,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70798330] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:06,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532442188] [2022-11-02 20:46:06,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:46:06,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:06,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:06,565 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:06,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:46:06,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:06,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:46:06,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:07,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:07,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532442188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:46:07,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:46:07,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-02 20:46:07,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769001982] [2022-11-02 20:46:07,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:07,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:46:07,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:07,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:46:07,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:46:07,604 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-02 20:46:07,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 776 places, 1682 transitions, 37157 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 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) [2022-11-02 20:46:07,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:46:07,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-02 20:46:07,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:46:21,249 INFO L130 PetriNetUnfolder]: 1425/3949 cut-off events. [2022-11-02 20:46:21,249 INFO L131 PetriNetUnfolder]: For 193930/193930 co-relation queries the response was YES. [2022-11-02 20:46:21,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38658 conditions, 3949 events. 1425/3949 cut-off events. For 193930/193930 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 34298 event pairs, 73 based on Foata normal form. 3/3922 useless extension candidates. Maximal degree in co-relation 38481. Up to 731 conditions per place. [2022-11-02 20:46:21,357 INFO L137 encePairwiseOnDemand]: 64/87 looper letters, 421 selfloop transitions, 1359 changer transitions 38/1857 dead transitions. [2022-11-02 20:46:21,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 959 places, 1857 transitions, 45956 flow [2022-11-02 20:46:21,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-11-02 20:46:21,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2022-11-02 20:46:21,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 10089 transitions. [2022-11-02 20:46:21,367 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6071493049286875 [2022-11-02 20:46:21,367 INFO L72 ComplementDD]: Start complementDD. Operand 191 states and 10089 transitions. [2022-11-02 20:46:21,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 191 states and 10089 transitions. [2022-11-02 20:46:21,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:46:21,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 191 states and 10089 transitions. [2022-11-02 20:46:21,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 192 states, 191 states have (on average 52.82198952879581) internal successors, (10089), 191 states have internal predecessors, (10089), 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) [2022-11-02 20:46:21,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 192 states, 192 states have (on average 87.0) internal successors, (16704), 192 states have internal predecessors, (16704), 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) [2022-11-02 20:46:21,395 INFO L81 ComplementDD]: Finished complementDD. Result has 192 states, 192 states have (on average 87.0) internal successors, (16704), 192 states have internal predecessors, (16704), 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) [2022-11-02 20:46:21,396 INFO L175 Difference]: Start difference. First operand has 776 places, 1682 transitions, 37157 flow. Second operand 191 states and 10089 transitions. [2022-11-02 20:46:21,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 959 places, 1857 transitions, 45956 flow [2022-11-02 20:46:23,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 922 places, 1857 transitions, 44011 flow, removed 439 selfloop flow, removed 37 redundant places. [2022-11-02 20:46:23,527 INFO L231 Difference]: Finished difference. Result has 931 places, 1661 transitions, 38349 flow [2022-11-02 20:46:23,529 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=36002, PETRI_DIFFERENCE_MINUEND_PLACES=732, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=191, PETRI_FLOW=38349, PETRI_PLACES=931, PETRI_TRANSITIONS=1661} [2022-11-02 20:46:23,529 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 854 predicate places. [2022-11-02 20:46:23,529 INFO L495 AbstractCegarLoop]: Abstraction has has 931 places, 1661 transitions, 38349 flow [2022-11-02 20:46:23,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 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) [2022-11-02 20:46:23,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:23,530 INFO L208 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] [2022-11-02 20:46:23,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:46:23,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-02 20:46:23,743 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:46:23,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:23,743 INFO L85 PathProgramCache]: Analyzing trace with hash 864512579, now seen corresponding path program 14 times [2022-11-02 20:46:23,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:23,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144859423] [2022-11-02 20:46:23,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:23,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:23,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:23,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:23,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144859423] [2022-11-02 20:46:23,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144859423] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:23,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158119853] [2022-11-02 20:46:23,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:46:23,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:23,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:23,998 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:24,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:46:24,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:46:24,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:46:24,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:46:24,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:24,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:25,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158119853] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:46:25,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:46:25,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-02 20:46:25,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149918564] [2022-11-02 20:46:25,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:25,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:46:25,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:25,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:46:25,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:46:25,110 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-02 20:46:25,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 931 places, 1661 transitions, 38349 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 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) [2022-11-02 20:46:25,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:46:25,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-02 20:46:25,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:46:30,029 INFO L130 PetriNetUnfolder]: 1419/4051 cut-off events. [2022-11-02 20:46:30,029 INFO L131 PetriNetUnfolder]: For 142385/142385 co-relation queries the response was YES. [2022-11-02 20:46:30,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38067 conditions, 4051 events. 1419/4051 cut-off events. For 142385/142385 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 35611 event pairs, 66 based on Foata normal form. 2/4029 useless extension candidates. Maximal degree in co-relation 37896. Up to 721 conditions per place. [2022-11-02 20:46:30,136 INFO L137 encePairwiseOnDemand]: 66/87 looper letters, 293 selfloop transitions, 1429 changer transitions 17/1778 dead transitions. [2022-11-02 20:46:30,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 967 places, 1778 transitions, 44247 flow [2022-11-02 20:46:30,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-02 20:46:30,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-11-02 20:46:30,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3082 transitions. [2022-11-02 20:46:30,140 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6107808164883076 [2022-11-02 20:46:30,140 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3082 transitions. [2022-11-02 20:46:30,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3082 transitions. [2022-11-02 20:46:30,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:46:30,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3082 transitions. [2022-11-02 20:46:30,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 53.13793103448276) internal successors, (3082), 58 states have internal predecessors, (3082), 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) [2022-11-02 20:46:30,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 87.0) internal successors, (5133), 59 states have internal predecessors, (5133), 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) [2022-11-02 20:46:30,145 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 87.0) internal successors, (5133), 59 states have internal predecessors, (5133), 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) [2022-11-02 20:46:30,146 INFO L175 Difference]: Start difference. First operand has 931 places, 1661 transitions, 38349 flow. Second operand 58 states and 3082 transitions. [2022-11-02 20:46:30,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 967 places, 1778 transitions, 44247 flow [2022-11-02 20:46:31,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 795 places, 1778 transitions, 41754 flow, removed 24 selfloop flow, removed 172 redundant places. [2022-11-02 20:46:31,818 INFO L231 Difference]: Finished difference. Result has 806 places, 1711 transitions, 40165 flow [2022-11-02 20:46:31,819 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=35959, PETRI_DIFFERENCE_MINUEND_PLACES=738, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1372, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=40165, PETRI_PLACES=806, PETRI_TRANSITIONS=1711} [2022-11-02 20:46:31,819 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 729 predicate places. [2022-11-02 20:46:31,819 INFO L495 AbstractCegarLoop]: Abstraction has has 806 places, 1711 transitions, 40165 flow [2022-11-02 20:46:31,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 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) [2022-11-02 20:46:31,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:31,819 INFO L208 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] [2022-11-02 20:46:31,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:46:32,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-02 20:46:32,020 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:46:32,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:32,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1961745853, now seen corresponding path program 15 times [2022-11-02 20:46:32,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:32,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81062585] [2022-11-02 20:46:32,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:32,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:32,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:32,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:32,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81062585] [2022-11-02 20:46:32,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81062585] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:32,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828458323] [2022-11-02 20:46:32,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:46:32,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:32,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:32,270 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:32,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:46:32,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:46:32,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:46:32,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:46:32,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:32,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:33,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828458323] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:46:33,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:46:33,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-11-02 20:46:33,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487181261] [2022-11-02 20:46:33,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:33,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 20:46:33,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:33,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 20:46:33,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:46:33,120 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-02 20:46:33,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 806 places, 1711 transitions, 40165 flow. Second operand has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 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) [2022-11-02 20:46:33,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:46:33,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-02 20:46:33,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:46:38,452 INFO L130 PetriNetUnfolder]: 1484/4241 cut-off events. [2022-11-02 20:46:38,453 INFO L131 PetriNetUnfolder]: For 161571/161571 co-relation queries the response was YES. [2022-11-02 20:46:38,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41100 conditions, 4241 events. 1484/4241 cut-off events. For 161571/161571 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 37799 event pairs, 72 based on Foata normal form. 4/4207 useless extension candidates. Maximal degree in co-relation 40928. Up to 790 conditions per place. [2022-11-02 20:46:38,613 INFO L137 encePairwiseOnDemand]: 69/87 looper letters, 442 selfloop transitions, 1335 changer transitions 35/1851 dead transitions. [2022-11-02 20:46:38,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 858 places, 1851 transitions, 47459 flow [2022-11-02 20:46:38,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-02 20:46:38,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-11-02 20:46:38,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 3006 transitions. [2022-11-02 20:46:38,617 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6169950738916257 [2022-11-02 20:46:38,617 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 3006 transitions. [2022-11-02 20:46:38,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 3006 transitions. [2022-11-02 20:46:38,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:46:38,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 3006 transitions. [2022-11-02 20:46:38,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 53.67857142857143) internal successors, (3006), 56 states have internal predecessors, (3006), 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) [2022-11-02 20:46:38,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 87.0) internal successors, (4959), 57 states have internal predecessors, (4959), 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) [2022-11-02 20:46:38,622 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 87.0) internal successors, (4959), 57 states have internal predecessors, (4959), 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) [2022-11-02 20:46:38,622 INFO L175 Difference]: Start difference. First operand has 806 places, 1711 transitions, 40165 flow. Second operand 56 states and 3006 transitions. [2022-11-02 20:46:38,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 858 places, 1851 transitions, 47459 flow [2022-11-02 20:46:41,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 823 places, 1851 transitions, 45417 flow, removed 140 selfloop flow, removed 35 redundant places. [2022-11-02 20:46:41,381 INFO L231 Difference]: Finished difference. Result has 833 places, 1754 transitions, 42636 flow [2022-11-02 20:46:41,383 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=38326, PETRI_DIFFERENCE_MINUEND_PLACES=768, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=42636, PETRI_PLACES=833, PETRI_TRANSITIONS=1754} [2022-11-02 20:46:41,384 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 756 predicate places. [2022-11-02 20:46:41,384 INFO L495 AbstractCegarLoop]: Abstraction has has 833 places, 1754 transitions, 42636 flow [2022-11-02 20:46:41,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 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) [2022-11-02 20:46:41,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:41,384 INFO L208 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] [2022-11-02 20:46:41,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-02 20:46:41,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-02 20:46:41,598 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:46:41,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:41,598 INFO L85 PathProgramCache]: Analyzing trace with hash 970812609, now seen corresponding path program 16 times [2022-11-02 20:46:41,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:41,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70486035] [2022-11-02 20:46:41,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:41,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:41,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:41,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:41,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:41,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70486035] [2022-11-02 20:46:41,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70486035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:41,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571442939] [2022-11-02 20:46:41,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:46:41,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:41,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:41,845 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:41,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-02 20:46:41,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:46:41,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:46:41,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 20:46:41,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:42,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:42,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:42,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:42,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571442939] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:46:42,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:46:42,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-11-02 20:46:42,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550730310] [2022-11-02 20:46:42,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:42,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 20:46:42,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:42,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 20:46:42,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:46:42,682 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-02 20:46:42,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 833 places, 1754 transitions, 42636 flow. Second operand has 33 states, 33 states have (on average 50.878787878787875) internal successors, (1679), 33 states have internal predecessors, (1679), 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) [2022-11-02 20:46:42,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:46:42,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-02 20:46:42,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:46:51,304 INFO L130 PetriNetUnfolder]: 1599/4460 cut-off events. [2022-11-02 20:46:51,305 INFO L131 PetriNetUnfolder]: For 168765/168765 co-relation queries the response was YES. [2022-11-02 20:46:51,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44088 conditions, 4460 events. 1599/4460 cut-off events. For 168765/168765 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 39533 event pairs, 151 based on Foata normal form. 4/4418 useless extension candidates. Maximal degree in co-relation 43911. Up to 1172 conditions per place. [2022-11-02 20:46:51,464 INFO L137 encePairwiseOnDemand]: 69/87 looper letters, 827 selfloop transitions, 1257 changer transitions 16/2139 dead transitions. [2022-11-02 20:46:51,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 942 places, 2139 transitions, 55118 flow [2022-11-02 20:46:51,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-11-02 20:46:51,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2022-11-02 20:46:51,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 6701 transitions. [2022-11-02 20:46:51,472 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6064802244547017 [2022-11-02 20:46:51,472 INFO L72 ComplementDD]: Start complementDD. Operand 127 states and 6701 transitions. [2022-11-02 20:46:51,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 127 states and 6701 transitions. [2022-11-02 20:46:51,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:46:51,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 127 states and 6701 transitions. [2022-11-02 20:46:51,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 128 states, 127 states have (on average 52.76377952755905) internal successors, (6701), 127 states have internal predecessors, (6701), 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) [2022-11-02 20:46:51,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 128 states, 128 states have (on average 87.0) internal successors, (11136), 128 states have internal predecessors, (11136), 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) [2022-11-02 20:46:51,493 INFO L81 ComplementDD]: Finished complementDD. Result has 128 states, 128 states have (on average 87.0) internal successors, (11136), 128 states have internal predecessors, (11136), 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) [2022-11-02 20:46:51,493 INFO L175 Difference]: Start difference. First operand has 833 places, 1754 transitions, 42636 flow. Second operand 127 states and 6701 transitions. [2022-11-02 20:46:51,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 942 places, 2139 transitions, 55118 flow [2022-11-02 20:46:54,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 892 places, 2139 transitions, 52244 flow, removed 44 selfloop flow, removed 50 redundant places. [2022-11-02 20:46:54,717 INFO L231 Difference]: Finished difference. Result has 904 places, 2021 transitions, 48345 flow [2022-11-02 20:46:54,719 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=40206, PETRI_DIFFERENCE_MINUEND_PLACES=766, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1014, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=730, PETRI_DIFFERENCE_SUBTRAHEND_STATES=127, PETRI_FLOW=48345, PETRI_PLACES=904, PETRI_TRANSITIONS=2021} [2022-11-02 20:46:54,719 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 827 predicate places. [2022-11-02 20:46:54,719 INFO L495 AbstractCegarLoop]: Abstraction has has 904 places, 2021 transitions, 48345 flow [2022-11-02 20:46:54,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.878787878787875) internal successors, (1679), 33 states have internal predecessors, (1679), 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) [2022-11-02 20:46:54,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:54,720 INFO L208 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] [2022-11-02 20:46:54,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:46:54,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-02 20:46:54,920 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:46:54,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:54,921 INFO L85 PathProgramCache]: Analyzing trace with hash 937933709, now seen corresponding path program 17 times [2022-11-02 20:46:54,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:54,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322858899] [2022-11-02 20:46:54,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:54,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:55,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:55,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322858899] [2022-11-02 20:46:55,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322858899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:55,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714323623] [2022-11-02 20:46:55,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:46:55,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:55,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:55,183 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:55,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-02 20:46:55,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-02 20:46:55,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:46:55,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:46:55,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:55,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:46:55,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714323623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:46:55,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:46:55,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [16] total 25 [2022-11-02 20:46:55,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143670463] [2022-11-02 20:46:55,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:46:55,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:46:55,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:55,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:46:55,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:46:55,590 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-02 20:46:55,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 904 places, 2021 transitions, 48345 flow. Second operand has 15 states, 15 states have (on average 52.93333333333333) internal successors, (794), 15 states have internal predecessors, (794), 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) [2022-11-02 20:46:55,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:46:55,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-02 20:46:55,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:47:01,121 INFO L130 PetriNetUnfolder]: 1599/4454 cut-off events. [2022-11-02 20:47:01,121 INFO L131 PetriNetUnfolder]: For 166041/166041 co-relation queries the response was YES. [2022-11-02 20:47:01,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44049 conditions, 4454 events. 1599/4454 cut-off events. For 166041/166041 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 39696 event pairs, 137 based on Foata normal form. 7/4415 useless extension candidates. Maximal degree in co-relation 43865. Up to 1139 conditions per place. [2022-11-02 20:47:01,220 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 498 selfloop transitions, 1507 changer transitions 27/2073 dead transitions. [2022-11-02 20:47:01,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 931 places, 2073 transitions, 53464 flow [2022-11-02 20:47:01,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-02 20:47:01,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-02 20:47:01,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1783 transitions. [2022-11-02 20:47:01,222 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6404454022988506 [2022-11-02 20:47:01,222 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1783 transitions. [2022-11-02 20:47:01,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1783 transitions. [2022-11-02 20:47:01,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:47:01,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1783 transitions. [2022-11-02 20:47:01,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.71875) internal successors, (1783), 32 states have internal predecessors, (1783), 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) [2022-11-02 20:47:01,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 87.0) internal successors, (2871), 33 states have internal predecessors, (2871), 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) [2022-11-02 20:47:01,228 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 87.0) internal successors, (2871), 33 states have internal predecessors, (2871), 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) [2022-11-02 20:47:01,228 INFO L175 Difference]: Start difference. First operand has 904 places, 2021 transitions, 48345 flow. Second operand 32 states and 1783 transitions. [2022-11-02 20:47:01,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 931 places, 2073 transitions, 53464 flow [2022-11-02 20:47:03,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 902 places, 2073 transitions, 52700 flow, removed 83 selfloop flow, removed 29 redundant places. [2022-11-02 20:47:03,895 INFO L231 Difference]: Finished difference. Result has 906 places, 2001 transitions, 50237 flow [2022-11-02 20:47:03,896 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=47596, PETRI_DIFFERENCE_MINUEND_PLACES=871, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1506, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=50237, PETRI_PLACES=906, PETRI_TRANSITIONS=2001} [2022-11-02 20:47:03,896 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 829 predicate places. [2022-11-02 20:47:03,897 INFO L495 AbstractCegarLoop]: Abstraction has has 906 places, 2001 transitions, 50237 flow [2022-11-02 20:47:03,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.93333333333333) internal successors, (794), 15 states have internal predecessors, (794), 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) [2022-11-02 20:47:03,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:47:03,897 INFO L208 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] [2022-11-02 20:47:03,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-02 20:47:04,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-02 20:47:04,103 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:47:04,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:47:04,103 INFO L85 PathProgramCache]: Analyzing trace with hash 674811117, now seen corresponding path program 18 times [2022-11-02 20:47:04,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:47:04,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143505049] [2022-11-02 20:47:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:04,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:47:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:47:04,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:47:04,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143505049] [2022-11-02 20:47:04,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143505049] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:47:04,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338692623] [2022-11-02 20:47:04,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:47:04,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:47:04,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:47:04,364 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:47:04,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-02 20:47:04,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-02 20:47:04,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:47:04,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:47:04,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:47:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:47:04,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:47:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:47:05,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338692623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:47:05,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:47:05,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-11-02 20:47:05,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728098695] [2022-11-02 20:47:05,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:47:05,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 20:47:05,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:47:05,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 20:47:05,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:47:05,226 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-02 20:47:05,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 906 places, 2001 transitions, 50237 flow. Second operand has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 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) [2022-11-02 20:47:05,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:47:05,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-02 20:47:05,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:47:10,744 INFO L130 PetriNetUnfolder]: 1829/4794 cut-off events. [2022-11-02 20:47:10,744 INFO L131 PetriNetUnfolder]: For 181277/181277 co-relation queries the response was YES. [2022-11-02 20:47:10,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51383 conditions, 4794 events. 1829/4794 cut-off events. For 181277/181277 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 41964 event pairs, 91 based on Foata normal form. 1/4758 useless extension candidates. Maximal degree in co-relation 51201. Up to 1004 conditions per place. [2022-11-02 20:47:10,971 INFO L137 encePairwiseOnDemand]: 69/87 looper letters, 717 selfloop transitions, 1686 changer transitions 9/2451 dead transitions. [2022-11-02 20:47:10,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 939 places, 2451 transitions, 66441 flow [2022-11-02 20:47:10,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-02 20:47:10,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-02 20:47:10,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2351 transitions. [2022-11-02 20:47:10,975 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.614158829676071 [2022-11-02 20:47:10,975 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2351 transitions. [2022-11-02 20:47:10,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2351 transitions. [2022-11-02 20:47:10,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:47:10,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2351 transitions. [2022-11-02 20:47:10,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 53.43181818181818) internal successors, (2351), 44 states have internal predecessors, (2351), 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) [2022-11-02 20:47:10,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 87.0) internal successors, (3915), 45 states have internal predecessors, (3915), 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) [2022-11-02 20:47:10,979 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 87.0) internal successors, (3915), 45 states have internal predecessors, (3915), 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) [2022-11-02 20:47:10,979 INFO L175 Difference]: Start difference. First operand has 906 places, 2001 transitions, 50237 flow. Second operand 44 states and 2351 transitions. [2022-11-02 20:47:10,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 939 places, 2451 transitions, 66441 flow [2022-11-02 20:47:14,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 904 places, 2451 transitions, 62661 flow, removed 20 selfloop flow, removed 35 redundant places. [2022-11-02 20:47:14,692 INFO L231 Difference]: Finished difference. Result has 933 places, 2375 transitions, 62269 flow [2022-11-02 20:47:14,694 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=47164, PETRI_DIFFERENCE_MINUEND_PLACES=861, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=62269, PETRI_PLACES=933, PETRI_TRANSITIONS=2375} [2022-11-02 20:47:14,695 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 856 predicate places. [2022-11-02 20:47:14,695 INFO L495 AbstractCegarLoop]: Abstraction has has 933 places, 2375 transitions, 62269 flow [2022-11-02 20:47:14,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 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) [2022-11-02 20:47:14,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:47:14,695 INFO L208 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] [2022-11-02 20:47:14,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-02 20:47:14,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:47:14,896 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:47:14,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:47:14,896 INFO L85 PathProgramCache]: Analyzing trace with hash -417411559, now seen corresponding path program 19 times [2022-11-02 20:47:14,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:47:14,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800607659] [2022-11-02 20:47:14,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:14,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:47:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:47:15,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:47:15,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800607659] [2022-11-02 20:47:15,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800607659] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:47:15,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649095514] [2022-11-02 20:47:15,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:47:15,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:47:15,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:47:15,140 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:47:15,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-02 20:47:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:15,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:47:15,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:47:15,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:47:15,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:47:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:47:16,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649095514] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:47:16,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:47:16,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-02 20:47:16,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833523713] [2022-11-02 20:47:16,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:47:16,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:47:16,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:47:16,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:47:16,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:47:16,077 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-02 20:47:16,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 933 places, 2375 transitions, 62269 flow. Second operand has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 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) [2022-11-02 20:47:16,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:47:16,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-02 20:47:16,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:47:24,573 INFO L130 PetriNetUnfolder]: 2010/5202 cut-off events. [2022-11-02 20:47:24,573 INFO L131 PetriNetUnfolder]: For 213915/213915 co-relation queries the response was YES. [2022-11-02 20:47:24,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57931 conditions, 5202 events. 2010/5202 cut-off events. For 213915/213915 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 45869 event pairs, 103 based on Foata normal form. 1/5165 useless extension candidates. Maximal degree in co-relation 57725. Up to 1155 conditions per place. [2022-11-02 20:47:24,743 INFO L137 encePairwiseOnDemand]: 67/87 looper letters, 1003 selfloop transitions, 1693 changer transitions 10/2745 dead transitions. [2022-11-02 20:47:24,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1001 places, 2745 transitions, 77094 flow [2022-11-02 20:47:24,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-02 20:47:24,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-11-02 20:47:24,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 3844 transitions. [2022-11-02 20:47:24,748 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6052590143284522 [2022-11-02 20:47:24,748 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 3844 transitions. [2022-11-02 20:47:24,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 3844 transitions. [2022-11-02 20:47:24,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:47:24,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 3844 transitions. [2022-11-02 20:47:24,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 52.657534246575345) internal successors, (3844), 73 states have internal predecessors, (3844), 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) [2022-11-02 20:47:24,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 87.0) internal successors, (6438), 74 states have internal predecessors, (6438), 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) [2022-11-02 20:47:24,760 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 87.0) internal successors, (6438), 74 states have internal predecessors, (6438), 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) [2022-11-02 20:47:24,760 INFO L175 Difference]: Start difference. First operand has 933 places, 2375 transitions, 62269 flow. Second operand 73 states and 3844 transitions. [2022-11-02 20:47:24,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1001 places, 2745 transitions, 77094 flow [2022-11-02 20:47:28,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 990 places, 2745 transitions, 76822 flow, removed 19 selfloop flow, removed 11 redundant places. [2022-11-02 20:47:28,994 INFO L231 Difference]: Finished difference. Result has 1016 places, 2678 transitions, 76091 flow [2022-11-02 20:47:28,996 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=62009, PETRI_DIFFERENCE_MINUEND_PLACES=918, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=867, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=76091, PETRI_PLACES=1016, PETRI_TRANSITIONS=2678} [2022-11-02 20:47:28,997 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 939 predicate places. [2022-11-02 20:47:28,997 INFO L495 AbstractCegarLoop]: Abstraction has has 1016 places, 2678 transitions, 76091 flow [2022-11-02 20:47:28,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 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) [2022-11-02 20:47:28,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:47:28,997 INFO L208 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] [2022-11-02 20:47:29,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-02 20:47:29,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:47:29,198 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:47:29,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:47:29,198 INFO L85 PathProgramCache]: Analyzing trace with hash -780241453, now seen corresponding path program 20 times [2022-11-02 20:47:29,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:47:29,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599580841] [2022-11-02 20:47:29,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:29,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:47:29,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:47:29,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:47:29,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599580841] [2022-11-02 20:47:29,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599580841] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:47:29,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602549220] [2022-11-02 20:47:29,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:47:29,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:47:29,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:47:29,438 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:47:29,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7e2af4-9bd4-47ab-b775-a47ea73e2349/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-02 20:47:29,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:47:29,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:47:29,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:47:29,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:47:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:47:29,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:47:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:47:30,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602549220] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:47:30,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:47:30,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-02 20:47:30,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073105661] [2022-11-02 20:47:30,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:47:30,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:47:30,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:47:30,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:47:30,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:47:30,458 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-02 20:47:30,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1016 places, 2678 transitions, 76091 flow. Second operand has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 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) [2022-11-02 20:47:30,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:47:30,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-02 20:47:30,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand