./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/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_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/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_17b20f17-3e18-4115-accc-53a03fd24550/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 e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db --- 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 20:59:36,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:59:36,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:59:36,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:59:36,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:59:36,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:59:36,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:59:36,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:59:36,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:59:36,778 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:59:36,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:59:36,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:59:36,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:59:36,781 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:59:36,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:59:36,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:59:36,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:59:36,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:59:36,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:59:36,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:59:36,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:59:36,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:59:36,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:59:36,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:59:36,798 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:59:36,798 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:59:36,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:59:36,799 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:59:36,800 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:59:36,801 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:59:36,801 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:59:36,802 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:59:36,803 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:59:36,804 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:59:36,805 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:59:36,805 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:59:36,806 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:59:36,806 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:59:36,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:59:36,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:59:36,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:59:36,809 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:59:36,841 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:59:36,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:59:36,843 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:59:36,843 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:59:36,844 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:59:36,844 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:59:36,845 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:59:36,845 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:59:36,845 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:59:36,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:59:36,846 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:59:36,847 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:59:36,847 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:59:36,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:59:36,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:59:36,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:59:36,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:59:36,848 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:59:36,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:59:36,849 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:59:36,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:59:36,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:59:36,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:59:36,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:59:36,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:59:36,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:59:36,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:59:36,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:59:36,852 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:59:36,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:59:36,852 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:59:36,853 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:59:36,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:59:36,853 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_17b20f17-3e18-4115-accc-53a03fd24550/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db [2022-11-02 20:59:37,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:59:37,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:59:37,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:59:37,212 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:59:37,212 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:59:37,214 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-11-02 20:59:37,276 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/data/2dc99e3ff/65b490f154414d7eb463e4f50c179f26/FLAGef263bdb4 [2022-11-02 20:59:37,706 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:59:37,706 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-11-02 20:59:37,713 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/data/2dc99e3ff/65b490f154414d7eb463e4f50c179f26/FLAGef263bdb4 [2022-11-02 20:59:38,105 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/data/2dc99e3ff/65b490f154414d7eb463e4f50c179f26 [2022-11-02 20:59:38,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:59:38,113 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:59:38,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:59:38,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:59:38,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:59:38,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:59:38" (1/1) ... [2022-11-02 20:59:38,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64dea972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:38, skipping insertion in model container [2022-11-02 20:59:38,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:59:38" (1/1) ... [2022-11-02 20:59:38,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:59:38,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:59:38,417 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_17b20f17-3e18-4115-accc-53a03fd24550/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-11-02 20:59:38,423 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:59:38,430 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:59:38,451 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_17b20f17-3e18-4115-accc-53a03fd24550/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-11-02 20:59:38,452 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:59:38,465 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:59:38,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:38 WrapperNode [2022-11-02 20:59:38,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:59:38,466 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:59:38,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:59:38,467 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:59:38,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:38" (1/1) ... [2022-11-02 20:59:38,479 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:38" (1/1) ... [2022-11-02 20:59:38,496 INFO L138 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2022-11-02 20:59:38,497 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:59:38,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:59:38,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:59:38,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:59:38,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:38" (1/1) ... [2022-11-02 20:59:38,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:38" (1/1) ... [2022-11-02 20:59:38,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:38" (1/1) ... [2022-11-02 20:59:38,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:38" (1/1) ... [2022-11-02 20:59:38,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:38" (1/1) ... [2022-11-02 20:59:38,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:38" (1/1) ... [2022-11-02 20:59:38,518 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:38" (1/1) ... [2022-11-02 20:59:38,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:38" (1/1) ... [2022-11-02 20:59:38,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:59:38,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:59:38,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:59:38,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:59:38,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:38" (1/1) ... [2022-11-02 20:59:38,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:59:38,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:38,571 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:59:38,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:59:38,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:59:38,613 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-02 20:59:38,613 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-02 20:59:38,613 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-02 20:59:38,613 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-02 20:59:38,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:59:38,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:59:38,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:59:38,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-02 20:59:38,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-02 20:59:38,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:59:38,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:59:38,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:59:38,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:59:38,616 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 20:59:38,737 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:59:38,740 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:59:39,014 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:59:39,078 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:59:39,084 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:59:39,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:59:39 BoogieIcfgContainer [2022-11-02 20:59:39,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:59:39,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:59:39,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:59:39,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:59:39,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:59:38" (1/3) ... [2022-11-02 20:59:39,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c5cff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:59:39, skipping insertion in model container [2022-11-02 20:59:39,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:38" (2/3) ... [2022-11-02 20:59:39,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c5cff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:59:39, skipping insertion in model container [2022-11-02 20:59:39,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:59:39" (3/3) ... [2022-11-02 20:59:39,103 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2022-11-02 20:59:39,111 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:59:39,129 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:59:39,129 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:59:39,130 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:59:39,236 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-02 20:59:39,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 88 transitions, 192 flow [2022-11-02 20:59:39,345 INFO L130 PetriNetUnfolder]: 6/86 cut-off events. [2022-11-02 20:59:39,345 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:59:39,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 6/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-11-02 20:59:39,354 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 88 transitions, 192 flow [2022-11-02 20:59:39,358 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 77 transitions, 166 flow [2022-11-02 20:59:39,375 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:59:39,382 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;@2fdb7316, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:59:39,382 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-02 20:59:39,408 INFO L130 PetriNetUnfolder]: 6/76 cut-off events. [2022-11-02 20:59:39,408 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:59:39,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:59:39,409 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] [2022-11-02 20:59:39,410 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 20:59:39,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:39,416 INFO L85 PathProgramCache]: Analyzing trace with hash 967431071, now seen corresponding path program 1 times [2022-11-02 20:59:39,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:39,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892682243] [2022-11-02 20:59:39,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:39,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:39,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:40,564 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 20:59:40,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:40,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892682243] [2022-11-02 20:59:40,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892682243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:59:40,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:59:40,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:59:40,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447762893] [2022-11-02 20:59:40,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:59:40,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:59:40,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:40,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:59:40,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:59:40,622 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 88 [2022-11-02 20:59:40,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 166 flow. Second operand has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:40,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:59:40,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 88 [2022-11-02 20:59:40,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:59:40,963 INFO L130 PetriNetUnfolder]: 44/187 cut-off events. [2022-11-02 20:59:40,964 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-02 20:59:40,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 187 events. 44/187 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 511 event pairs, 16 based on Foata normal form. 15/187 useless extension candidates. Maximal degree in co-relation 217. Up to 49 conditions per place. [2022-11-02 20:59:40,970 INFO L137 encePairwiseOnDemand]: 76/88 looper letters, 33 selfloop transitions, 7 changer transitions 2/89 dead transitions. [2022-11-02 20:59:40,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 89 transitions, 277 flow [2022-11-02 20:59:40,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:59:40,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-02 20:59:40,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 509 transitions. [2022-11-02 20:59:40,997 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7230113636363636 [2022-11-02 20:59:40,997 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 509 transitions. [2022-11-02 20:59:40,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 509 transitions. [2022-11-02 20:59:41,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:59:41,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 509 transitions. [2022-11-02 20:59:41,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 63.625) internal successors, (509), 8 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:41,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 88.0) internal successors, (792), 9 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 20:59:41,021 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 88.0) internal successors, (792), 9 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 20:59:41,023 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 166 flow. Second operand 8 states and 509 transitions. [2022-11-02 20:59:41,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 89 transitions, 277 flow [2022-11-02 20:59:41,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 89 transitions, 267 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-02 20:59:41,032 INFO L231 Difference]: Finished difference. Result has 84 places, 75 transitions, 187 flow [2022-11-02 20:59:41,034 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=187, PETRI_PLACES=84, PETRI_TRANSITIONS=75} [2022-11-02 20:59:41,037 INFO L287 CegarLoopForPetriNet]: 78 programPoint places, 6 predicate places. [2022-11-02 20:59:41,038 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 75 transitions, 187 flow [2022-11-02 20:59:41,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:41,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:59:41,039 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] [2022-11-02 20:59:41,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:59:41,039 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 20:59:41,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:41,040 INFO L85 PathProgramCache]: Analyzing trace with hash -6394160, now seen corresponding path program 1 times [2022-11-02 20:59:41,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:41,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734923123] [2022-11-02 20:59:41,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:41,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:42,423 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 20:59:42,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:42,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734923123] [2022-11-02 20:59:42,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734923123] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:42,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951989603] [2022-11-02 20:59:42,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:42,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:42,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:42,428 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:42,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:59:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:42,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-02 20:59:42,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:43,779 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 20:59:43,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:44,873 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 20:59:44,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951989603] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:44,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:59:44,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [11, 15] total 29 [2022-11-02 20:59:44,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953430496] [2022-11-02 20:59:44,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:59:44,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:59:44,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:44,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:59:44,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:59:44,879 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-11-02 20:59:44,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 187 flow. Second operand has 14 states, 14 states have (on average 51.07142857142857) internal successors, (715), 14 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:44,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:59:44,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-11-02 20:59:44,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:59:46,814 INFO L130 PetriNetUnfolder]: 210/626 cut-off events. [2022-11-02 20:59:46,814 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2022-11-02 20:59:46,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1297 conditions, 626 events. 210/626 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3163 event pairs, 31 based on Foata normal form. 1/580 useless extension candidates. Maximal degree in co-relation 867. Up to 99 conditions per place. [2022-11-02 20:59:46,819 INFO L137 encePairwiseOnDemand]: 69/88 looper letters, 94 selfloop transitions, 55 changer transitions 16/204 dead transitions. [2022-11-02 20:59:46,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 204 transitions, 915 flow [2022-11-02 20:59:46,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-02 20:59:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-02 20:59:46,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1525 transitions. [2022-11-02 20:59:46,824 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6189123376623377 [2022-11-02 20:59:46,825 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1525 transitions. [2022-11-02 20:59:46,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1525 transitions. [2022-11-02 20:59:46,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:59:46,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1525 transitions. [2022-11-02 20:59:46,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 54.464285714285715) internal successors, (1525), 28 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:46,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 88.0) internal successors, (2552), 29 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:46,837 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 88.0) internal successors, (2552), 29 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:46,837 INFO L175 Difference]: Start difference. First operand has 84 places, 75 transitions, 187 flow. Second operand 28 states and 1525 transitions. [2022-11-02 20:59:46,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 204 transitions, 915 flow [2022-11-02 20:59:46,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 204 transitions, 901 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-02 20:59:46,845 INFO L231 Difference]: Finished difference. Result has 114 places, 125 transitions, 517 flow [2022-11-02 20:59:46,845 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=517, PETRI_PLACES=114, PETRI_TRANSITIONS=125} [2022-11-02 20:59:46,846 INFO L287 CegarLoopForPetriNet]: 78 programPoint places, 36 predicate places. [2022-11-02 20:59:46,846 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 125 transitions, 517 flow [2022-11-02 20:59:46,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 51.07142857142857) internal successors, (715), 14 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:46,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:59:46,847 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, 1] [2022-11-02 20:59:46,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:47,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:47,061 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 20:59:47,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:47,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1348690739, now seen corresponding path program 1 times [2022-11-02 20:59:47,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:47,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980036430] [2022-11-02 20:59:47,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:47,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:48,705 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 20:59:48,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:48,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980036430] [2022-11-02 20:59:48,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980036430] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:48,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582983178] [2022-11-02 20:59:48,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:48,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:48,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:48,708 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:48,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:59:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:48,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 20:59:48,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:49,991 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 20:59:49,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:52,903 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 20:59:52,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582983178] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:52,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:52,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 34 [2022-11-02 20:59:52,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445632889] [2022-11-02 20:59:52,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:52,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:59:52,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:52,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:59:52,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:59:52,908 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-11-02 20:59:52,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 125 transitions, 517 flow. Second operand has 34 states, 34 states have (on average 51.23529411764706) internal successors, (1742), 34 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:52,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:59:52,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-11-02 20:59:52,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:00:50,277 INFO L130 PetriNetUnfolder]: 770/2448 cut-off events. [2022-11-02 21:00:50,277 INFO L131 PetriNetUnfolder]: For 3327/3327 co-relation queries the response was YES. [2022-11-02 21:00:50,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6690 conditions, 2448 events. 770/2448 cut-off events. For 3327/3327 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 20321 event pairs, 19 based on Foata normal form. 21/2467 useless extension candidates. Maximal degree in co-relation 6620. Up to 241 conditions per place. [2022-11-02 21:00:50,297 INFO L137 encePairwiseOnDemand]: 66/88 looper letters, 282 selfloop transitions, 317 changer transitions 231/869 dead transitions. [2022-11-02 21:00:50,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 869 transitions, 5976 flow [2022-11-02 21:00:50,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-02 21:00:50,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2022-11-02 21:00:50,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 10097 transitions. [2022-11-02 21:00:50,321 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5975970643939394 [2022-11-02 21:00:50,321 INFO L72 ComplementDD]: Start complementDD. Operand 192 states and 10097 transitions. [2022-11-02 21:00:50,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 192 states and 10097 transitions. [2022-11-02 21:00:50,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:00:50,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 192 states and 10097 transitions. [2022-11-02 21:00:50,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 193 states, 192 states have (on average 52.588541666666664) internal successors, (10097), 192 states have internal predecessors, (10097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:00:50,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 193 states, 193 states have (on average 88.0) internal successors, (16984), 193 states have internal predecessors, (16984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:00:50,382 INFO L81 ComplementDD]: Finished complementDD. Result has 193 states, 193 states have (on average 88.0) internal successors, (16984), 193 states have internal predecessors, (16984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:00:50,383 INFO L175 Difference]: Start difference. First operand has 114 places, 125 transitions, 517 flow. Second operand 192 states and 10097 transitions. [2022-11-02 21:00:50,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 869 transitions, 5976 flow [2022-11-02 21:00:50,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 869 transitions, 5790 flow, removed 87 selfloop flow, removed 9 redundant places. [2022-11-02 21:00:50,430 INFO L231 Difference]: Finished difference. Result has 390 places, 449 transitions, 3569 flow [2022-11-02 21:00:50,431 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=192, PETRI_FLOW=3569, PETRI_PLACES=390, PETRI_TRANSITIONS=449} [2022-11-02 21:00:50,433 INFO L287 CegarLoopForPetriNet]: 78 programPoint places, 312 predicate places. [2022-11-02 21:00:50,434 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 449 transitions, 3569 flow [2022-11-02 21:00:50,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 51.23529411764706) internal successors, (1742), 34 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:00:50,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:00:50,435 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:50,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:50,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:50,661 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 21:00:50,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:50,661 INFO L85 PathProgramCache]: Analyzing trace with hash -75493695, now seen corresponding path program 2 times [2022-11-02 21:00:50,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:50,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032600368] [2022-11-02 21:00:50,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:50,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:50,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:50,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:00:50,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:50,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032600368] [2022-11-02 21:00:50,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032600368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:50,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128080268] [2022-11-02 21:00:50,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:00:50,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:50,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:50,929 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:50,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 21:00:51,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:00:51,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:00:51,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 21:00:51,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:00:51,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:00:51,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128080268] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:51,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:51,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 6] total 13 [2022-11-02 21:00:51,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719666289] [2022-11-02 21:00:51,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:51,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 21:00:51,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:51,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 21:00:51,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-02 21:00:51,440 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 88 [2022-11-02 21:00:51,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 449 transitions, 3569 flow. Second operand has 13 states, 13 states have (on average 58.61538461538461) internal successors, (762), 13 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:00:51,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:00:51,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 88 [2022-11-02 21:00:51,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:00:52,721 INFO L130 PetriNetUnfolder]: 761/1958 cut-off events. [2022-11-02 21:00:52,722 INFO L131 PetriNetUnfolder]: For 47735/47735 co-relation queries the response was YES. [2022-11-02 21:00:52,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11867 conditions, 1958 events. 761/1958 cut-off events. For 47735/47735 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13402 event pairs, 15 based on Foata normal form. 40/1992 useless extension candidates. Maximal degree in co-relation 11672. Up to 348 conditions per place. [2022-11-02 21:00:52,766 INFO L137 encePairwiseOnDemand]: 76/88 looper letters, 496 selfloop transitions, 311 changer transitions 0/852 dead transitions. [2022-11-02 21:00:52,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 852 transitions, 8665 flow [2022-11-02 21:00:52,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 21:00:52,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-02 21:00:52,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1012 transitions. [2022-11-02 21:00:52,769 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6764705882352942 [2022-11-02 21:00:52,769 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1012 transitions. [2022-11-02 21:00:52,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1012 transitions. [2022-11-02 21:00:52,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:00:52,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1012 transitions. [2022-11-02 21:00:52,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 59.529411764705884) internal successors, (1012), 17 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:00:52,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 88.0) internal successors, (1584), 18 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:00:52,776 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 88.0) internal successors, (1584), 18 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:00:52,776 INFO L175 Difference]: Start difference. First operand has 390 places, 449 transitions, 3569 flow. Second operand 17 states and 1012 transitions. [2022-11-02 21:00:52,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 852 transitions, 8665 flow [2022-11-02 21:00:52,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 852 transitions, 7768 flow, removed 441 selfloop flow, removed 70 redundant places. [2022-11-02 21:00:52,988 INFO L231 Difference]: Finished difference. Result has 261 places, 619 transitions, 5788 flow [2022-11-02 21:00:52,989 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=2886, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5788, PETRI_PLACES=261, PETRI_TRANSITIONS=619} [2022-11-02 21:00:52,991 INFO L287 CegarLoopForPetriNet]: 78 programPoint places, 183 predicate places. [2022-11-02 21:00:52,991 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 619 transitions, 5788 flow [2022-11-02 21:00:52,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 58.61538461538461) internal successors, (762), 13 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:00:52,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:00:52,992 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:53,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:53,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:53,221 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 21:00:53,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:53,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1940891410, now seen corresponding path program 2 times [2022-11-02 21:00:53,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:53,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579155518] [2022-11-02 21:00:53,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:53,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:00:55,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:55,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579155518] [2022-11-02 21:00:55,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579155518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:55,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500887180] [2022-11-02 21:00:55,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:00:55,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:55,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:55,705 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:55,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 21:00:55,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:00:55,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:00:55,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-02 21:00:55,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:00:57,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:01:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:01:00,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500887180] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:01:00,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:01:00,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 19] total 43 [2022-11-02 21:01:00,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398823882] [2022-11-02 21:01:00,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:01:00,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-02 21:01:00,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:00,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-02 21:01:00,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2022-11-02 21:01:00,942 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-11-02 21:01:00,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 619 transitions, 5788 flow. Second operand has 43 states, 43 states have (on average 51.04651162790697) internal successors, (2195), 43 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:01:00,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:01:00,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-11-02 21:01:00,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:01:38,369 INFO L130 PetriNetUnfolder]: 1411/3845 cut-off events. [2022-11-02 21:01:38,369 INFO L131 PetriNetUnfolder]: For 41715/41715 co-relation queries the response was YES. [2022-11-02 21:01:38,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21063 conditions, 3845 events. 1411/3845 cut-off events. For 41715/41715 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 32216 event pairs, 10 based on Foata normal form. 15/3857 useless extension candidates. Maximal degree in co-relation 20876. Up to 811 conditions per place. [2022-11-02 21:01:38,422 INFO L137 encePairwiseOnDemand]: 65/88 looper letters, 740 selfloop transitions, 676 changer transitions 119/1574 dead transitions. [2022-11-02 21:01:38,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1574 transitions, 19605 flow [2022-11-02 21:01:38,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-11-02 21:01:38,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2022-11-02 21:01:38,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 6409 transitions. [2022-11-02 21:01:38,434 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6018970698722765 [2022-11-02 21:01:38,434 INFO L72 ComplementDD]: Start complementDD. Operand 121 states and 6409 transitions. [2022-11-02 21:01:38,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 6409 transitions. [2022-11-02 21:01:38,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:01:38,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 121 states and 6409 transitions. [2022-11-02 21:01:38,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 122 states, 121 states have (on average 52.96694214876033) internal successors, (6409), 121 states have internal predecessors, (6409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:01:38,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 122 states, 122 states have (on average 88.0) internal successors, (10736), 122 states have internal predecessors, (10736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:01:38,467 INFO L81 ComplementDD]: Finished complementDD. Result has 122 states, 122 states have (on average 88.0) internal successors, (10736), 122 states have internal predecessors, (10736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:01:38,468 INFO L175 Difference]: Start difference. First operand has 261 places, 619 transitions, 5788 flow. Second operand 121 states and 6409 transitions. [2022-11-02 21:01:38,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1574 transitions, 19605 flow [2022-11-02 21:01:38,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1574 transitions, 18136 flow, removed 570 selfloop flow, removed 6 redundant places. [2022-11-02 21:01:38,819 INFO L231 Difference]: Finished difference. Result has 444 places, 1095 transitions, 13311 flow [2022-11-02 21:01:38,820 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=5334, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=121, PETRI_FLOW=13311, PETRI_PLACES=444, PETRI_TRANSITIONS=1095} [2022-11-02 21:01:38,821 INFO L287 CegarLoopForPetriNet]: 78 programPoint places, 366 predicate places. [2022-11-02 21:01:38,821 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 1095 transitions, 13311 flow [2022-11-02 21:01:38,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 51.04651162790697) internal successors, (2195), 43 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:01:38,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:01:38,823 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:38,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:39,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:39,030 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 21:01:39,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:39,031 INFO L85 PathProgramCache]: Analyzing trace with hash -716008444, now seen corresponding path program 3 times [2022-11-02 21:01:39,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:39,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36398013] [2022-11-02 21:01:39,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:39,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:01:45,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:01:45,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36398013] [2022-11-02 21:01:45,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36398013] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:01:45,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936593475] [2022-11-02 21:01:45,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:01:45,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:45,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:45,801 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:01:45,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b20f17-3e18-4115-accc-53a03fd24550/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 21:01:46,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 21:01:46,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:01:46,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-02 21:01:46,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:48,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:01:48,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:01:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:01:57,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936593475] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:01:57,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:01:57,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 39 [2022-11-02 21:01:57,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205996295] [2022-11-02 21:01:57,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:01:57,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-02 21:01:57,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:57,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-02 21:01:57,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1255, Unknown=2, NotChecked=0, Total=1482 [2022-11-02 21:01:57,844 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-11-02 21:01:57,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 1095 transitions, 13311 flow. Second operand has 39 states, 39 states have (on average 51.1025641025641) internal successors, (1993), 39 states have internal predecessors, (1993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:01:57,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:01:57,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-11-02 21:01:57,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:02:43,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []