./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-queue.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_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/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_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/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_18bf1f78-9e03-4a92-a844-05cf9391b766/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 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 --- 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 20:56:15,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:56:15,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:56:15,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:56:15,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:56:15,643 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:56:15,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:56:15,646 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:56:15,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:56:15,649 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:56:15,650 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:56:15,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:56:15,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:56:15,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:56:15,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:56:15,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:56:15,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:56:15,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:56:15,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:56:15,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:56:15,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:56:15,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:56:15,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:56:15,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:56:15,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:56:15,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:56:15,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:56:15,671 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:56:15,672 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:56:15,673 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:56:15,673 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:56:15,674 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:56:15,675 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:56:15,676 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:56:15,677 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:56:15,677 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:56:15,678 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:56:15,679 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:56:15,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:56:15,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:56:15,681 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:56:15,682 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:56:15,702 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:56:15,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:56:15,703 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:56:15,704 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:56:15,704 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:56:15,705 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:56:15,705 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:56:15,705 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:56:15,706 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:56:15,706 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:56:15,706 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:56:15,707 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:56:15,707 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:56:15,707 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:56:15,707 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:56:15,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:56:15,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:56:15,708 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:56:15,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:56:15,709 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:56:15,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:56:15,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:56:15,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:56:15,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:56:15,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:56:15,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:56:15,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:56:15,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:56:15,711 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:56:15,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:56:15,712 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:56:15,712 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:56:15,712 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:56:15,712 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 [2022-11-02 20:56:15,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:56:16,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:56:16,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:56:16,004 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:56:16,005 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:56:16,007 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-11-02 20:56:16,079 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/data/21227df68/370136d7efd743a68cb16f7659d7d07c/FLAGd07f21779 [2022-11-02 20:56:16,567 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:56:16,568 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-11-02 20:56:16,574 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/data/21227df68/370136d7efd743a68cb16f7659d7d07c/FLAGd07f21779 [2022-11-02 20:56:16,962 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/data/21227df68/370136d7efd743a68cb16f7659d7d07c [2022-11-02 20:56:16,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:56:16,966 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:56:16,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:56:16,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:56:16,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:56:16,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:56:16" (1/1) ... [2022-11-02 20:56:16,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4626bfab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:56:16, skipping insertion in model container [2022-11-02 20:56:16,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:56:16" (1/1) ... [2022-11-02 20:56:16,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:56:16,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:56:17,209 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_18bf1f78-9e03-4a92-a844-05cf9391b766/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2438,2451] [2022-11-02 20:56:17,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:56:17,225 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:56:17,244 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_18bf1f78-9e03-4a92-a844-05cf9391b766/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2438,2451] [2022-11-02 20:56:17,248 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:56:17,261 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:56:17,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:56:17 WrapperNode [2022-11-02 20:56:17,262 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:56:17,263 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:56:17,263 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:56:17,263 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:56:17,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:56:17" (1/1) ... [2022-11-02 20:56:17,287 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:56:17" (1/1) ... [2022-11-02 20:56:17,316 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 128 [2022-11-02 20:56:17,317 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:56:17,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:56:17,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:56:17,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:56:17,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:56:17" (1/1) ... [2022-11-02 20:56:17,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:56:17" (1/1) ... [2022-11-02 20:56:17,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:56:17" (1/1) ... [2022-11-02 20:56:17,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:56:17" (1/1) ... [2022-11-02 20:56:17,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:56:17" (1/1) ... [2022-11-02 20:56:17,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:56:17" (1/1) ... [2022-11-02 20:56:17,340 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:56:17" (1/1) ... [2022-11-02 20:56:17,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:56:17" (1/1) ... [2022-11-02 20:56:17,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:56:17,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:56:17,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:56:17,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:56:17,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:56:17" (1/1) ... [2022-11-02 20:56:17,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:56:17,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:56:17,386 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:56:17,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:56:17,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:56:17,423 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-02 20:56:17,423 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-02 20:56:17,423 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-02 20:56:17,423 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-02 20:56:17,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:56:17,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:56:17,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:56:17,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-02 20:56:17,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-02 20:56:17,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:56:17,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:56:17,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:56:17,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:56:17,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:56:17,426 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 20:56:17,525 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:56:17,528 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:56:17,797 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:56:17,921 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:56:17,934 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-02 20:56:17,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:56:17 BoogieIcfgContainer [2022-11-02 20:56:17,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:56:17,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:56:17,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:56:17,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:56:17,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:56:16" (1/3) ... [2022-11-02 20:56:17,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b893fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:56:17, skipping insertion in model container [2022-11-02 20:56:17,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:56:17" (2/3) ... [2022-11-02 20:56:17,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b893fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:56:17, skipping insertion in model container [2022-11-02 20:56:17,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:56:17" (3/3) ... [2022-11-02 20:56:17,954 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2022-11-02 20:56:17,969 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:56:17,980 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:56:17,980 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:56:17,981 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:56:18,049 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-02 20:56:18,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 120 transitions, 256 flow [2022-11-02 20:56:18,159 INFO L130 PetriNetUnfolder]: 9/118 cut-off events. [2022-11-02 20:56:18,160 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:56:18,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 118 events. 9/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2022-11-02 20:56:18,170 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 120 transitions, 256 flow [2022-11-02 20:56:18,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 109 transitions, 230 flow [2022-11-02 20:56:18,187 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:56:18,195 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;@f46c484, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:56:18,195 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-02 20:56:18,242 INFO L130 PetriNetUnfolder]: 9/108 cut-off events. [2022-11-02 20:56:18,243 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:56:18,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:56:18,244 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:18,244 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 20:56:18,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:18,250 INFO L85 PathProgramCache]: Analyzing trace with hash 527262811, now seen corresponding path program 1 times [2022-11-02 20:56:18,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:18,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484234028] [2022-11-02 20:56:18,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:18,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:18,489 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 20:56:18,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:18,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484234028] [2022-11-02 20:56:18,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484234028] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:18,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:18,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:56:18,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165498826] [2022-11-02 20:56:18,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:18,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:56:18,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:18,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:56:18,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:56:18,558 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 120 [2022-11-02 20:56:18,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 109 transitions, 230 flow. Second operand has 2 states, 2 states have (on average 110.0) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:18,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:56:18,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 120 [2022-11-02 20:56:18,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:56:18,651 INFO L130 PetriNetUnfolder]: 5/105 cut-off events. [2022-11-02 20:56:18,651 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-02 20:56:18,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 105 events. 5/105 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 8/107 useless extension candidates. Maximal degree in co-relation 83. Up to 9 conditions per place. [2022-11-02 20:56:18,653 INFO L137 encePairwiseOnDemand]: 114/120 looper letters, 6 selfloop transitions, 0 changer transitions 3/103 dead transitions. [2022-11-02 20:56:18,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 103 transitions, 230 flow [2022-11-02 20:56:18,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:56:18,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:56:18,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 226 transitions. [2022-11-02 20:56:18,676 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9416666666666667 [2022-11-02 20:56:18,676 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 226 transitions. [2022-11-02 20:56:18,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 226 transitions. [2022-11-02 20:56:18,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:56:18,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 226 transitions. [2022-11-02 20:56:18,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 113.0) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:18,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:18,700 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:18,703 INFO L175 Difference]: Start difference. First operand has 107 places, 109 transitions, 230 flow. Second operand 2 states and 226 transitions. [2022-11-02 20:56:18,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 103 transitions, 230 flow [2022-11-02 20:56:18,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 103 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-02 20:56:18,713 INFO L231 Difference]: Finished difference. Result has 104 places, 100 transitions, 204 flow [2022-11-02 20:56:18,715 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=204, PETRI_PLACES=104, PETRI_TRANSITIONS=100} [2022-11-02 20:56:18,720 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, -3 predicate places. [2022-11-02 20:56:18,720 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 100 transitions, 204 flow [2022-11-02 20:56:18,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 110.0) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:18,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:56:18,721 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:18,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:56:18,722 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 20:56:18,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:18,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1102375271, now seen corresponding path program 1 times [2022-11-02 20:56:18,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:18,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133131862] [2022-11-02 20:56:18,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:18,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:19,249 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 20:56:19,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:19,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133131862] [2022-11-02 20:56:19,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133131862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:19,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:19,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:56:19,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078752238] [2022-11-02 20:56:19,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:19,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:56:19,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:19,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:56:19,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:56:19,255 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 120 [2022-11-02 20:56:19,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 100 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:19,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:56:19,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 120 [2022-11-02 20:56:19,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:56:19,396 INFO L130 PetriNetUnfolder]: 7/120 cut-off events. [2022-11-02 20:56:19,397 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-02 20:56:19,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 120 events. 7/120 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 90 event pairs, 0 based on Foata normal form. 1/117 useless extension candidates. Maximal degree in co-relation 152. Up to 15 conditions per place. [2022-11-02 20:56:19,400 INFO L137 encePairwiseOnDemand]: 115/120 looper letters, 21 selfloop transitions, 2 changer transitions 4/107 dead transitions. [2022-11-02 20:56:19,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 107 transitions, 274 flow [2022-11-02 20:56:19,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:56:19,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-02 20:56:19,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 478 transitions. [2022-11-02 20:56:19,408 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7966666666666666 [2022-11-02 20:56:19,408 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 478 transitions. [2022-11-02 20:56:19,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 478 transitions. [2022-11-02 20:56:19,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:56:19,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 478 transitions. [2022-11-02 20:56:19,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:19,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:19,418 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:19,418 INFO L175 Difference]: Start difference. First operand has 104 places, 100 transitions, 204 flow. Second operand 5 states and 478 transitions. [2022-11-02 20:56:19,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 107 transitions, 274 flow [2022-11-02 20:56:19,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 107 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:56:19,424 INFO L231 Difference]: Finished difference. Result has 108 places, 101 transitions, 220 flow [2022-11-02 20:56:19,425 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=108, PETRI_TRANSITIONS=101} [2022-11-02 20:56:19,426 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, 1 predicate places. [2022-11-02 20:56:19,426 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 220 flow [2022-11-02 20:56:19,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:19,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:56:19,428 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:19,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:56:19,429 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 20:56:19,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:19,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1844346479, now seen corresponding path program 1 times [2022-11-02 20:56:19,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:19,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524764408] [2022-11-02 20:56:19,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:19,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:19,780 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 20:56:19,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:19,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524764408] [2022-11-02 20:56:19,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524764408] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:19,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:19,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:56:19,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094065093] [2022-11-02 20:56:19,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:19,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:56:19,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:19,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:56:19,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:56:19,783 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 120 [2022-11-02 20:56:19,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 101 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:19,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:56:19,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 120 [2022-11-02 20:56:19,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:56:19,873 INFO L130 PetriNetUnfolder]: 8/142 cut-off events. [2022-11-02 20:56:19,873 INFO L131 PetriNetUnfolder]: For 13/14 co-relation queries the response was YES. [2022-11-02 20:56:19,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 142 events. 8/142 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 193 event pairs, 1 based on Foata normal form. 3/137 useless extension candidates. Maximal degree in co-relation 180. Up to 18 conditions per place. [2022-11-02 20:56:19,875 INFO L137 encePairwiseOnDemand]: 115/120 looper letters, 12 selfloop transitions, 4 changer transitions 2/105 dead transitions. [2022-11-02 20:56:19,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 105 transitions, 267 flow [2022-11-02 20:56:19,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:56:19,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:56:19,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2022-11-02 20:56:19,877 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8833333333333333 [2022-11-02 20:56:19,877 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2022-11-02 20:56:19,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2022-11-02 20:56:19,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:56:19,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2022-11-02 20:56:19,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:19,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:19,882 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:19,882 INFO L175 Difference]: Start difference. First operand has 108 places, 101 transitions, 220 flow. Second operand 3 states and 318 transitions. [2022-11-02 20:56:19,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 105 transitions, 267 flow [2022-11-02 20:56:19,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 105 transitions, 261 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-02 20:56:19,888 INFO L231 Difference]: Finished difference. Result has 106 places, 102 transitions, 232 flow [2022-11-02 20:56:19,888 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=106, PETRI_TRANSITIONS=102} [2022-11-02 20:56:19,891 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, -1 predicate places. [2022-11-02 20:56:19,891 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 102 transitions, 232 flow [2022-11-02 20:56:19,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:19,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:56:19,892 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, 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 20:56:19,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:56:19,892 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 20:56:19,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:19,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1295712521, now seen corresponding path program 1 times [2022-11-02 20:56:19,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:19,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562288534] [2022-11-02 20:56:19,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:19,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:20,114 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 20:56:20,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:20,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562288534] [2022-11-02 20:56:20,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562288534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:20,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:20,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:56:20,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121070352] [2022-11-02 20:56:20,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:20,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:56:20,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:20,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:56:20,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:56:20,124 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 120 [2022-11-02 20:56:20,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 102 transitions, 232 flow. Second operand has 6 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:20,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:56:20,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 120 [2022-11-02 20:56:20,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:56:20,274 INFO L130 PetriNetUnfolder]: 8/185 cut-off events. [2022-11-02 20:56:20,275 INFO L131 PetriNetUnfolder]: For 23/24 co-relation queries the response was YES. [2022-11-02 20:56:20,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 185 events. 8/185 cut-off events. For 23/24 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 366 event pairs, 2 based on Foata normal form. 2/175 useless extension candidates. Maximal degree in co-relation 250. Up to 28 conditions per place. [2022-11-02 20:56:20,277 INFO L137 encePairwiseOnDemand]: 112/120 looper letters, 20 selfloop transitions, 6 changer transitions 5/111 dead transitions. [2022-11-02 20:56:20,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 111 transitions, 316 flow [2022-11-02 20:56:20,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:56:20,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-02 20:56:20,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 681 transitions. [2022-11-02 20:56:20,280 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8107142857142857 [2022-11-02 20:56:20,280 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 681 transitions. [2022-11-02 20:56:20,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 681 transitions. [2022-11-02 20:56:20,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:56:20,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 681 transitions. [2022-11-02 20:56:20,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.28571428571429) internal successors, (681), 7 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:20,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:20,289 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:20,290 INFO L175 Difference]: Start difference. First operand has 106 places, 102 transitions, 232 flow. Second operand 7 states and 681 transitions. [2022-11-02 20:56:20,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 111 transitions, 316 flow [2022-11-02 20:56:20,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 111 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:56:20,297 INFO L231 Difference]: Finished difference. Result has 113 places, 103 transitions, 250 flow [2022-11-02 20:56:20,297 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=250, PETRI_PLACES=113, PETRI_TRANSITIONS=103} [2022-11-02 20:56:20,299 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, 6 predicate places. [2022-11-02 20:56:20,304 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 103 transitions, 250 flow [2022-11-02 20:56:20,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:20,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:56:20,306 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, 1, 1, 1, 1, 1, 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 20:56:20,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:56:20,306 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 20:56:20,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:20,307 INFO L85 PathProgramCache]: Analyzing trace with hash 254244494, now seen corresponding path program 1 times [2022-11-02 20:56:20,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:20,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827058598] [2022-11-02 20:56:20,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:20,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:21,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:21,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827058598] [2022-11-02 20:56:21,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827058598] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:21,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213072433] [2022-11-02 20:56:21,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:21,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:21,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:56:21,450 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:56:21,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:56:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:21,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-02 20:56:21,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:21,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:56:22,100 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:56:22,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 20:56:22,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 20:56:22,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:56:22,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:56:22,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-02 20:56:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:22,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:24,262 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:56:24,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2022-11-02 20:56:24,281 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-02 20:56:24,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 131 [2022-11-02 20:56:24,293 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-02 20:56:24,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 100 [2022-11-02 20:56:24,305 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-02 20:56:24,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 67 [2022-11-02 20:56:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:25,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213072433] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:25,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:56:25,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 20] total 50 [2022-11-02 20:56:25,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848649146] [2022-11-02 20:56:25,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:25,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-02 20:56:25,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:25,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-02 20:56:25,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=1980, Unknown=33, NotChecked=0, Total=2450 [2022-11-02 20:56:25,123 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-11-02 20:56:25,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 103 transitions, 250 flow. Second operand has 50 states, 50 states have (on average 50.66) internal successors, (2533), 50 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:25,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:56:25,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-11-02 20:56:25,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:56:28,287 INFO L130 PetriNetUnfolder]: 94/682 cut-off events. [2022-11-02 20:56:28,287 INFO L131 PetriNetUnfolder]: For 179/179 co-relation queries the response was YES. [2022-11-02 20:56:28,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1148 conditions, 682 events. 94/682 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4091 event pairs, 0 based on Foata normal form. 4/636 useless extension candidates. Maximal degree in co-relation 1140. Up to 74 conditions per place. [2022-11-02 20:56:28,293 INFO L137 encePairwiseOnDemand]: 95/120 looper letters, 122 selfloop transitions, 46 changer transitions 25/235 dead transitions. [2022-11-02 20:56:28,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 235 transitions, 1016 flow [2022-11-02 20:56:28,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-02 20:56:28,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-02 20:56:28,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2066 transitions. [2022-11-02 20:56:28,303 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.44145299145299144 [2022-11-02 20:56:28,303 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2066 transitions. [2022-11-02 20:56:28,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2066 transitions. [2022-11-02 20:56:28,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:56:28,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2066 transitions. [2022-11-02 20:56:28,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 52.97435897435897) internal successors, (2066), 39 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:28,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 120.0) internal successors, (4800), 40 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:28,324 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 120.0) internal successors, (4800), 40 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:28,325 INFO L175 Difference]: Start difference. First operand has 113 places, 103 transitions, 250 flow. Second operand 39 states and 2066 transitions. [2022-11-02 20:56:28,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 235 transitions, 1016 flow [2022-11-02 20:56:28,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 235 transitions, 1002 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-11-02 20:56:28,332 INFO L231 Difference]: Finished difference. Result has 164 places, 141 transitions, 568 flow [2022-11-02 20:56:28,332 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=568, PETRI_PLACES=164, PETRI_TRANSITIONS=141} [2022-11-02 20:56:28,335 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, 57 predicate places. [2022-11-02 20:56:28,336 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 141 transitions, 568 flow [2022-11-02 20:56:28,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 50.66) internal successors, (2533), 50 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:28,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:56:28,338 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, 1, 1, 1, 1, 1, 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 20:56:28,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:56:28,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:28,551 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 20:56:28,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:28,551 INFO L85 PathProgramCache]: Analyzing trace with hash 363430546, now seen corresponding path program 2 times [2022-11-02 20:56:28,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:28,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064727609] [2022-11-02 20:56:28,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:28,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:29,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:29,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064727609] [2022-11-02 20:56:29,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064727609] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:29,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753940335] [2022-11-02 20:56:29,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:56:29,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:29,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:56:29,817 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:56:29,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:56:29,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:56:29,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:56:29,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-02 20:56:29,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:29,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:56:30,012 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:56:30,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-02 20:56:30,480 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:56:30,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-02 20:56:30,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 20:56:31,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:56:31,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:56:31,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:56:31,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-02 20:56:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:31,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:32,774 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:56:32,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 45 [2022-11-02 20:56:32,792 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:56:32,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 96 [2022-11-02 20:56:32,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-11-02 20:56:32,814 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:56:32,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 51 [2022-11-02 20:56:34,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:34,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753940335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:34,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:56:34,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 54 [2022-11-02 20:56:34,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599119198] [2022-11-02 20:56:34,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:34,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-02 20:56:34,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:34,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-02 20:56:34,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=2636, Unknown=11, NotChecked=0, Total=2862 [2022-11-02 20:56:34,139 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-11-02 20:56:34,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 141 transitions, 568 flow. Second operand has 54 states, 54 states have (on average 50.574074074074076) internal successors, (2731), 54 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:34,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:56:34,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-11-02 20:56:34,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:56:40,273 INFO L130 PetriNetUnfolder]: 182/1255 cut-off events. [2022-11-02 20:56:40,273 INFO L131 PetriNetUnfolder]: For 1206/1210 co-relation queries the response was YES. [2022-11-02 20:56:40,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2511 conditions, 1255 events. 182/1255 cut-off events. For 1206/1210 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 9924 event pairs, 16 based on Foata normal form. 14/1161 useless extension candidates. Maximal degree in co-relation 2485. Up to 145 conditions per place. [2022-11-02 20:56:40,286 INFO L137 encePairwiseOnDemand]: 92/120 looper letters, 124 selfloop transitions, 62 changer transitions 25/253 dead transitions. [2022-11-02 20:56:40,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 253 transitions, 1551 flow [2022-11-02 20:56:40,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-02 20:56:40,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-11-02 20:56:40,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2377 transitions. [2022-11-02 20:56:40,295 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.4306159420289855 [2022-11-02 20:56:40,295 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2377 transitions. [2022-11-02 20:56:40,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2377 transitions. [2022-11-02 20:56:40,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:56:40,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2377 transitions. [2022-11-02 20:56:40,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 51.67391304347826) internal successors, (2377), 46 states have internal predecessors, (2377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:40,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 120.0) internal successors, (5640), 47 states have internal predecessors, (5640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:40,321 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 120.0) internal successors, (5640), 47 states have internal predecessors, (5640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:40,321 INFO L175 Difference]: Start difference. First operand has 164 places, 141 transitions, 568 flow. Second operand 46 states and 2377 transitions. [2022-11-02 20:56:40,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 253 transitions, 1551 flow [2022-11-02 20:56:40,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 253 transitions, 1388 flow, removed 70 selfloop flow, removed 18 redundant places. [2022-11-02 20:56:40,338 INFO L231 Difference]: Finished difference. Result has 203 places, 168 transitions, 907 flow [2022-11-02 20:56:40,339 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=907, PETRI_PLACES=203, PETRI_TRANSITIONS=168} [2022-11-02 20:56:40,341 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, 96 predicate places. [2022-11-02 20:56:40,342 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 168 transitions, 907 flow [2022-11-02 20:56:40,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 50.574074074074076) internal successors, (2731), 54 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:40,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:56:40,344 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:56:40,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:40,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:56:40,549 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 20:56:40,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:40,550 INFO L85 PathProgramCache]: Analyzing trace with hash -425017932, now seen corresponding path program 3 times [2022-11-02 20:56:40,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:40,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287402078] [2022-11-02 20:56:40,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:40,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:56:40,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:40,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287402078] [2022-11-02 20:56:40,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287402078] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:40,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956872619] [2022-11-02 20:56:40,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:56:40,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:40,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:56:40,726 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:56:40,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:56:40,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:56:40,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:56:40,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-02 20:56:40,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:41,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 20:56:41,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:56:41,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:56:41,659 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-02 20:56:41,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-02 20:56:41,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:56:41,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:43,941 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:56:43,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2022-11-02 20:56:43,955 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-02 20:56:43,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 300 treesize of output 275 [2022-11-02 20:56:43,969 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-02 20:56:43,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 268 treesize of output 244 [2022-11-02 20:56:43,982 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-02 20:56:43,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 196 [2022-11-02 20:56:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:56:44,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956872619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:44,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:56:44,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 21, 18] total 36 [2022-11-02 20:56:44,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774175314] [2022-11-02 20:56:44,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:44,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-02 20:56:44,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:44,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-02 20:56:44,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1029, Unknown=41, NotChecked=0, Total=1260 [2022-11-02 20:56:44,336 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 120 [2022-11-02 20:56:44,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 168 transitions, 907 flow. Second operand has 36 states, 36 states have (on average 54.916666666666664) internal successors, (1977), 36 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:44,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:56:44,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 120 [2022-11-02 20:56:44,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:56:46,516 INFO L130 PetriNetUnfolder]: 415/2430 cut-off events. [2022-11-02 20:56:46,517 INFO L131 PetriNetUnfolder]: For 5573/5603 co-relation queries the response was YES. [2022-11-02 20:56:46,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5864 conditions, 2430 events. 415/2430 cut-off events. For 5573/5603 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 23635 event pairs, 11 based on Foata normal form. 68/2294 useless extension candidates. Maximal degree in co-relation 5826. Up to 344 conditions per place. [2022-11-02 20:56:46,537 INFO L137 encePairwiseOnDemand]: 89/120 looper letters, 158 selfloop transitions, 142 changer transitions 29/374 dead transitions. [2022-11-02 20:56:46,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 374 transitions, 3169 flow [2022-11-02 20:56:46,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-02 20:56:46,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-11-02 20:56:46,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2600 transitions. [2022-11-02 20:56:46,543 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.46099290780141844 [2022-11-02 20:56:46,543 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2600 transitions. [2022-11-02 20:56:46,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2600 transitions. [2022-11-02 20:56:46,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:56:46,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2600 transitions. [2022-11-02 20:56:46,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 55.319148936170215) internal successors, (2600), 47 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:46,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 120.0) internal successors, (5760), 48 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:46,560 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 120.0) internal successors, (5760), 48 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:46,561 INFO L175 Difference]: Start difference. First operand has 203 places, 168 transitions, 907 flow. Second operand 47 states and 2600 transitions. [2022-11-02 20:56:46,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 374 transitions, 3169 flow [2022-11-02 20:56:46,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 374 transitions, 2844 flow, removed 137 selfloop flow, removed 34 redundant places. [2022-11-02 20:56:46,592 INFO L231 Difference]: Finished difference. Result has 228 places, 289 transitions, 2438 flow [2022-11-02 20:56:46,593 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=2438, PETRI_PLACES=228, PETRI_TRANSITIONS=289} [2022-11-02 20:56:46,593 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, 121 predicate places. [2022-11-02 20:56:46,593 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 289 transitions, 2438 flow [2022-11-02 20:56:46,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 54.916666666666664) internal successors, (1977), 36 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:46,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:56:46,595 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:56:46,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:46,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:46,808 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 20:56:46,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:46,809 INFO L85 PathProgramCache]: Analyzing trace with hash 446863596, now seen corresponding path program 4 times [2022-11-02 20:56:46,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:46,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581683119] [2022-11-02 20:56:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:46,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:56:46,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:46,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581683119] [2022-11-02 20:56:46,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581683119] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:46,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512419383] [2022-11-02 20:56:46,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:56:46,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:46,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:56:46,984 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:56:47,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:56:47,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:56:47,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:56:47,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:56:47,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:47,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:47,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:48,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512419383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:48,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:56:48,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 12] total 24 [2022-11-02 20:56:48,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26742104] [2022-11-02 20:56:48,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:48,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 20:56:48,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:48,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 20:56:48,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:56:48,133 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 120 [2022-11-02 20:56:48,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 289 transitions, 2438 flow. Second operand has 24 states, 24 states have (on average 90.83333333333333) internal successors, (2180), 24 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:48,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:56:48,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 120 [2022-11-02 20:56:48,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:56:49,225 INFO L130 PetriNetUnfolder]: 135/1454 cut-off events. [2022-11-02 20:56:49,226 INFO L131 PetriNetUnfolder]: For 7382/7583 co-relation queries the response was YES. [2022-11-02 20:56:49,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4232 conditions, 1454 events. 135/1454 cut-off events. For 7382/7583 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 12692 event pairs, 3 based on Foata normal form. 117/1451 useless extension candidates. Maximal degree in co-relation 4184. Up to 175 conditions per place. [2022-11-02 20:56:49,241 INFO L137 encePairwiseOnDemand]: 105/120 looper letters, 58 selfloop transitions, 52 changer transitions 95/282 dead transitions. [2022-11-02 20:56:49,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 282 transitions, 2788 flow [2022-11-02 20:56:49,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-02 20:56:49,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-02 20:56:49,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2650 transitions. [2022-11-02 20:56:49,246 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7614942528735632 [2022-11-02 20:56:49,246 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2650 transitions. [2022-11-02 20:56:49,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2650 transitions. [2022-11-02 20:56:49,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:56:49,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2650 transitions. [2022-11-02 20:56:49,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 91.37931034482759) internal successors, (2650), 29 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:49,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 120.0) internal successors, (3600), 30 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:49,261 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 120.0) internal successors, (3600), 30 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:49,261 INFO L175 Difference]: Start difference. First operand has 228 places, 289 transitions, 2438 flow. Second operand 29 states and 2650 transitions. [2022-11-02 20:56:49,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 282 transitions, 2788 flow [2022-11-02 20:56:49,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 282 transitions, 2536 flow, removed 89 selfloop flow, removed 36 redundant places. [2022-11-02 20:56:49,295 INFO L231 Difference]: Finished difference. Result has 213 places, 157 transitions, 1067 flow [2022-11-02 20:56:49,296 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1067, PETRI_PLACES=213, PETRI_TRANSITIONS=157} [2022-11-02 20:56:49,298 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, 106 predicate places. [2022-11-02 20:56:49,298 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 157 transitions, 1067 flow [2022-11-02 20:56:49,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 90.83333333333333) internal successors, (2180), 24 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:49,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:56:49,300 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:49,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:49,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-02 20:56:49,527 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 20:56:49,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:49,527 INFO L85 PathProgramCache]: Analyzing trace with hash -458696651, now seen corresponding path program 5 times [2022-11-02 20:56:49,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:49,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437002067] [2022-11-02 20:56:49,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:49,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:50,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:50,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437002067] [2022-11-02 20:56:50,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437002067] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:50,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641723338] [2022-11-02 20:56:50,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:56:50,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:50,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:56:50,884 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:56:50,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:56:50,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-02 20:56:50,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:56:50,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-02 20:56:50,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:50,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:56:51,227 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:56:51,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 20:56:52,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:56:52,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-02 20:56:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:52,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:52,608 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:56:52,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 38 [2022-11-02 20:56:52,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-02 20:56:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:54,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641723338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:54,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:56:54,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 58 [2022-11-02 20:56:54,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122541041] [2022-11-02 20:56:54,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:54,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-02 20:56:54,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:54,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-02 20:56:54,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=3005, Unknown=0, NotChecked=0, Total=3306 [2022-11-02 20:56:54,045 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-11-02 20:56:54,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 157 transitions, 1067 flow. Second operand has 58 states, 58 states have (on average 51.60344827586207) internal successors, (2993), 58 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:54,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:56:54,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-11-02 20:56:54,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:56:59,905 INFO L130 PetriNetUnfolder]: 276/2092 cut-off events. [2022-11-02 20:56:59,905 INFO L131 PetriNetUnfolder]: For 10310/10322 co-relation queries the response was YES. [2022-11-02 20:56:59,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6679 conditions, 2092 events. 276/2092 cut-off events. For 10310/10322 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 19823 event pairs, 12 based on Foata normal form. 19/1930 useless extension candidates. Maximal degree in co-relation 6636. Up to 262 conditions per place. [2022-11-02 20:56:59,925 INFO L137 encePairwiseOnDemand]: 91/120 looper letters, 155 selfloop transitions, 78 changer transitions 75/350 dead transitions. [2022-11-02 20:56:59,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 350 transitions, 3786 flow [2022-11-02 20:56:59,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-02 20:56:59,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-11-02 20:56:59,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3289 transitions. [2022-11-02 20:56:59,933 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.4420698924731183 [2022-11-02 20:56:59,934 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3289 transitions. [2022-11-02 20:56:59,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3289 transitions. [2022-11-02 20:56:59,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:56:59,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3289 transitions. [2022-11-02 20:56:59,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 53.04838709677419) internal successors, (3289), 62 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:59,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 120.0) internal successors, (7560), 63 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:59,957 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 120.0) internal successors, (7560), 63 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:59,957 INFO L175 Difference]: Start difference. First operand has 213 places, 157 transitions, 1067 flow. Second operand 62 states and 3289 transitions. [2022-11-02 20:56:59,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 350 transitions, 3786 flow [2022-11-02 20:56:59,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 350 transitions, 2575 flow, removed 577 selfloop flow, removed 28 redundant places. [2022-11-02 20:56:59,990 INFO L231 Difference]: Finished difference. Result has 249 places, 181 transitions, 1415 flow [2022-11-02 20:56:59,990 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=1415, PETRI_PLACES=249, PETRI_TRANSITIONS=181} [2022-11-02 20:56:59,991 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, 142 predicate places. [2022-11-02 20:56:59,991 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 181 transitions, 1415 flow [2022-11-02 20:56:59,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 51.60344827586207) internal successors, (2993), 58 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:59,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:56:59,993 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:57:00,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:00,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:00,206 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 20:57:00,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:00,206 INFO L85 PathProgramCache]: Analyzing trace with hash 3183857, now seen corresponding path program 6 times [2022-11-02 20:57:00,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:00,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403692234] [2022-11-02 20:57:00,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:00,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:01,195 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:01,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:01,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403692234] [2022-11-02 20:57:01,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403692234] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:57:01,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326632143] [2022-11-02 20:57:01,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:57:01,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:01,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:57:01,197 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:57:01,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:57:01,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-02 20:57:01,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:57:01,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-02 20:57:01,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:02,331 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-02 20:57:02,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-02 20:57:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:02,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:57:02,626 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-02 20:57:02,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2022-11-02 20:57:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:04,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326632143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:57:04,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:57:04,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 45 [2022-11-02 20:57:04,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318693199] [2022-11-02 20:57:04,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:57:04,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-02 20:57:04,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:04,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-02 20:57:04,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1739, Unknown=0, NotChecked=0, Total=1980 [2022-11-02 20:57:04,033 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-11-02 20:57:04,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 181 transitions, 1415 flow. Second operand has 45 states, 45 states have (on average 61.2) internal successors, (2754), 45 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:04,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:57:04,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-11-02 20:57:04,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:57:09,818 INFO L130 PetriNetUnfolder]: 447/3356 cut-off events. [2022-11-02 20:57:09,819 INFO L131 PetriNetUnfolder]: For 15992/16025 co-relation queries the response was YES. [2022-11-02 20:57:09,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9849 conditions, 3356 events. 447/3356 cut-off events. For 15992/16025 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 36811 event pairs, 7 based on Foata normal form. 37/3107 useless extension candidates. Maximal degree in co-relation 9791. Up to 377 conditions per place. [2022-11-02 20:57:09,855 INFO L137 encePairwiseOnDemand]: 90/120 looper letters, 152 selfloop transitions, 154 changer transitions 106/460 dead transitions. [2022-11-02 20:57:09,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 460 transitions, 5035 flow [2022-11-02 20:57:09,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-02 20:57:09,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-11-02 20:57:09,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 4177 transitions. [2022-11-02 20:57:09,877 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5195273631840795 [2022-11-02 20:57:09,878 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 4177 transitions. [2022-11-02 20:57:09,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 4177 transitions. [2022-11-02 20:57:09,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:57:09,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 4177 transitions. [2022-11-02 20:57:09,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 62.343283582089555) internal successors, (4177), 67 states have internal predecessors, (4177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:09,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 120.0) internal successors, (8160), 68 states have internal predecessors, (8160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:09,917 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 120.0) internal successors, (8160), 68 states have internal predecessors, (8160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:09,918 INFO L175 Difference]: Start difference. First operand has 249 places, 181 transitions, 1415 flow. Second operand 67 states and 4177 transitions. [2022-11-02 20:57:09,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 460 transitions, 5035 flow [2022-11-02 20:57:09,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 460 transitions, 4338 flow, removed 273 selfloop flow, removed 44 redundant places. [2022-11-02 20:57:09,981 INFO L231 Difference]: Finished difference. Result has 288 places, 272 transitions, 2821 flow [2022-11-02 20:57:09,983 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=2821, PETRI_PLACES=288, PETRI_TRANSITIONS=272} [2022-11-02 20:57:09,985 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, 181 predicate places. [2022-11-02 20:57:09,985 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 272 transitions, 2821 flow [2022-11-02 20:57:09,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 61.2) internal successors, (2754), 45 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:09,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:57:09,986 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:57:10,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:10,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:10,202 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 20:57:10,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:10,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1542011473, now seen corresponding path program 7 times [2022-11-02 20:57:10,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:10,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209269356] [2022-11-02 20:57:10,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:10,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:11,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:11,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209269356] [2022-11-02 20:57:11,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209269356] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:57:11,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96690542] [2022-11-02 20:57:11,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:57:11,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:11,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:57:11,483 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:57:11,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:57:11,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:11,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-02 20:57:11,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:12,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-02 20:57:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:12,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:57:12,574 INFO L356 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-02 20:57:12,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 17 [2022-11-02 20:57:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:13,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96690542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:57:13,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:57:13,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 46 [2022-11-02 20:57:13,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481582026] [2022-11-02 20:57:13,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:57:13,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-02 20:57:13,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:13,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-02 20:57:13,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1743, Unknown=0, NotChecked=0, Total=2070 [2022-11-02 20:57:13,406 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-11-02 20:57:13,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 272 transitions, 2821 flow. Second operand has 46 states, 46 states have (on average 61.15217391304348) internal successors, (2813), 46 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:13,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:57:13,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-11-02 20:57:13,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:57:19,129 INFO L130 PetriNetUnfolder]: 418/3572 cut-off events. [2022-11-02 20:57:19,130 INFO L131 PetriNetUnfolder]: For 32232/32321 co-relation queries the response was YES. [2022-11-02 20:57:19,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12505 conditions, 3572 events. 418/3572 cut-off events. For 32232/32321 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 39658 event pairs, 3 based on Foata normal form. 89/3355 useless extension candidates. Maximal degree in co-relation 12434. Up to 382 conditions per place. [2022-11-02 20:57:19,164 INFO L137 encePairwiseOnDemand]: 94/120 looper letters, 192 selfloop transitions, 89 changer transitions 176/505 dead transitions. [2022-11-02 20:57:19,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 505 transitions, 6550 flow [2022-11-02 20:57:19,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-02 20:57:19,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-11-02 20:57:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3646 transitions. [2022-11-02 20:57:19,170 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5238505747126436 [2022-11-02 20:57:19,170 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3646 transitions. [2022-11-02 20:57:19,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3646 transitions. [2022-11-02 20:57:19,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:57:19,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3646 transitions. [2022-11-02 20:57:19,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 62.86206896551724) internal successors, (3646), 58 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:19,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 120.0) internal successors, (7080), 59 states have internal predecessors, (7080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:19,189 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 120.0) internal successors, (7080), 59 states have internal predecessors, (7080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:19,189 INFO L175 Difference]: Start difference. First operand has 288 places, 272 transitions, 2821 flow. Second operand 58 states and 3646 transitions. [2022-11-02 20:57:19,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 505 transitions, 6550 flow [2022-11-02 20:57:19,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 505 transitions, 5572 flow, removed 455 selfloop flow, removed 42 redundant places. [2022-11-02 20:57:19,315 INFO L231 Difference]: Finished difference. Result has 300 places, 209 transitions, 1981 flow [2022-11-02 20:57:19,316 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=2479, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=1981, PETRI_PLACES=300, PETRI_TRANSITIONS=209} [2022-11-02 20:57:19,316 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, 193 predicate places. [2022-11-02 20:57:19,316 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 209 transitions, 1981 flow [2022-11-02 20:57:19,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 61.15217391304348) internal successors, (2813), 46 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:19,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:57:19,318 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:57:19,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:19,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:19,531 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 20:57:19,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:19,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1612226681, now seen corresponding path program 8 times [2022-11-02 20:57:19,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:19,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454426056] [2022-11-02 20:57:19,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:19,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:21,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:21,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454426056] [2022-11-02 20:57:21,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454426056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:57:21,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587456739] [2022-11-02 20:57:21,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:57:21,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:21,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:57:21,800 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:57:21,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:57:21,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:57:21,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:57:21,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-02 20:57:21,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:22,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 20:57:23,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:57:23,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:57:23,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:57:23,639 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-02 20:57:23,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-02 20:57:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:23,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:57:23,799 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_269 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_269) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2022-11-02 20:57:25,092 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:57:25,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 46 [2022-11-02 20:57:25,103 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:57:25,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 174 [2022-11-02 20:57:25,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 108 [2022-11-02 20:57:25,129 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:57:25,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 126 [2022-11-02 20:57:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-02 20:57:26,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587456739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:57:26,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:57:26,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 67 [2022-11-02 20:57:26,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135874109] [2022-11-02 20:57:26,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:57:26,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-02 20:57:26,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:26,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-02 20:57:26,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=4005, Unknown=6, NotChecked=128, Total=4422 [2022-11-02 20:57:26,831 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-11-02 20:57:26,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 209 transitions, 1981 flow. Second operand has 67 states, 67 states have (on average 50.38805970149254) internal successors, (3376), 67 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:26,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:57:26,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-11-02 20:57:26,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:57:32,385 INFO L130 PetriNetUnfolder]: 304/2594 cut-off events. [2022-11-02 20:57:32,385 INFO L131 PetriNetUnfolder]: For 24140/24209 co-relation queries the response was YES. [2022-11-02 20:57:32,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9093 conditions, 2594 events. 304/2594 cut-off events. For 24140/24209 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 26484 event pairs, 35 based on Foata normal form. 44/2423 useless extension candidates. Maximal degree in co-relation 9023. Up to 696 conditions per place. [2022-11-02 20:57:32,406 INFO L137 encePairwiseOnDemand]: 90/120 looper letters, 138 selfloop transitions, 67 changer transitions 35/282 dead transitions. [2022-11-02 20:57:32,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 282 transitions, 3317 flow [2022-11-02 20:57:32,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-02 20:57:32,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-02 20:57:32,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1863 transitions. [2022-11-02 20:57:32,411 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.43125 [2022-11-02 20:57:32,411 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1863 transitions. [2022-11-02 20:57:32,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1863 transitions. [2022-11-02 20:57:32,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:57:32,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1863 transitions. [2022-11-02 20:57:32,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 51.75) internal successors, (1863), 36 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:32,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 120.0) internal successors, (4440), 37 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:32,421 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 120.0) internal successors, (4440), 37 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:32,422 INFO L175 Difference]: Start difference. First operand has 300 places, 209 transitions, 1981 flow. Second operand 36 states and 1863 transitions. [2022-11-02 20:57:32,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 282 transitions, 3317 flow [2022-11-02 20:57:32,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 282 transitions, 2815 flow, removed 189 selfloop flow, removed 51 redundant places. [2022-11-02 20:57:32,505 INFO L231 Difference]: Finished difference. Result has 268 places, 230 transitions, 2135 flow [2022-11-02 20:57:32,505 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1684, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2135, PETRI_PLACES=268, PETRI_TRANSITIONS=230} [2022-11-02 20:57:32,506 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, 161 predicate places. [2022-11-02 20:57:32,506 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 230 transitions, 2135 flow [2022-11-02 20:57:32,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 50.38805970149254) internal successors, (3376), 67 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:32,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:57:32,508 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:57:32,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:32,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:57:32,711 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 20:57:32,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:32,712 INFO L85 PathProgramCache]: Analyzing trace with hash -390268167, now seen corresponding path program 9 times [2022-11-02 20:57:32,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:32,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092228251] [2022-11-02 20:57:32,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:32,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:34,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:34,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092228251] [2022-11-02 20:57:34,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092228251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:57:34,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604974253] [2022-11-02 20:57:34,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:57:34,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:34,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:57:34,264 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:57:34,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:57:34,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:57:34,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:57:34,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-02 20:57:34,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:34,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:57:34,668 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:57:34,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 20:57:35,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:57:35,604 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-02 20:57:35,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-02 20:57:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:57:35,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:57:36,031 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:57:36,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 38 [2022-11-02 20:57:36,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-02 20:57:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:57:37,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604974253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:57:37,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:57:37,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22, 22] total 58 [2022-11-02 20:57:37,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968356858] [2022-11-02 20:57:37,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:57:37,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-02 20:57:37,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:37,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-02 20:57:37,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=3115, Unknown=0, NotChecked=0, Total=3306 [2022-11-02 20:57:37,209 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 120 [2022-11-02 20:57:37,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 230 transitions, 2135 flow. Second operand has 58 states, 58 states have (on average 52.672413793103445) internal successors, (3055), 58 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:37,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:57:37,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 120 [2022-11-02 20:57:37,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:57:41,262 INFO L130 PetriNetUnfolder]: 269/2299 cut-off events. [2022-11-02 20:57:41,263 INFO L131 PetriNetUnfolder]: For 14842/14931 co-relation queries the response was YES. [2022-11-02 20:57:41,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7645 conditions, 2299 events. 269/2299 cut-off events. For 14842/14931 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 22525 event pairs, 14 based on Foata normal form. 22/2143 useless extension candidates. Maximal degree in co-relation 7590. Up to 699 conditions per place. [2022-11-02 20:57:41,282 INFO L137 encePairwiseOnDemand]: 87/120 looper letters, 149 selfloop transitions, 66 changer transitions 24/282 dead transitions. [2022-11-02 20:57:41,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 282 transitions, 3250 flow [2022-11-02 20:57:41,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-02 20:57:41,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-02 20:57:41,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2118 transitions. [2022-11-02 20:57:41,293 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.44125 [2022-11-02 20:57:41,293 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2118 transitions. [2022-11-02 20:57:41,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2118 transitions. [2022-11-02 20:57:41,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:57:41,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2118 transitions. [2022-11-02 20:57:41,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 52.95) internal successors, (2118), 40 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:41,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 120.0) internal successors, (4920), 41 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:41,304 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 120.0) internal successors, (4920), 41 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:41,304 INFO L175 Difference]: Start difference. First operand has 268 places, 230 transitions, 2135 flow. Second operand 40 states and 2118 transitions. [2022-11-02 20:57:41,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 282 transitions, 3250 flow [2022-11-02 20:57:41,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 282 transitions, 3062 flow, removed 42 selfloop flow, removed 31 redundant places. [2022-11-02 20:57:41,363 INFO L231 Difference]: Finished difference. Result has 284 places, 241 transitions, 2360 flow [2022-11-02 20:57:41,363 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1965, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=2360, PETRI_PLACES=284, PETRI_TRANSITIONS=241} [2022-11-02 20:57:41,363 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, 177 predicate places. [2022-11-02 20:57:41,364 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 241 transitions, 2360 flow [2022-11-02 20:57:41,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 52.672413793103445) internal successors, (3055), 58 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:41,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:57:41,365 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:57:41,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:41,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:57:41,579 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 20:57:41,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:41,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1898343703, now seen corresponding path program 10 times [2022-11-02 20:57:41,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:41,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292199813] [2022-11-02 20:57:41,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:41,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:42,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:42,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292199813] [2022-11-02 20:57:42,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292199813] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:57:42,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338250670] [2022-11-02 20:57:42,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:57:42,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:42,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:57:42,716 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:57:42,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:57:42,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:57:42,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:57:42,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-02 20:57:42,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:43,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:57:43,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:57:44,147 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-02 20:57:44,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-02 20:57:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:44,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:57:44,304 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_328 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_328) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2022-11-02 20:57:44,342 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:57:44,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 41 [2022-11-02 20:57:44,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-02 20:57:46,480 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-02 20:57:46,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338250670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:57:46,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:57:46,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 62 [2022-11-02 20:57:46,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640621191] [2022-11-02 20:57:46,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:57:46,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-02 20:57:46,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:46,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-02 20:57:46,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=3428, Unknown=1, NotChecked=118, Total=3782 [2022-11-02 20:57:46,487 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-11-02 20:57:46,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 241 transitions, 2360 flow. Second operand has 62 states, 62 states have (on average 51.53225806451613) internal successors, (3195), 62 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:46,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:57:46,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-11-02 20:57:46,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:57:55,744 INFO L130 PetriNetUnfolder]: 271/2139 cut-off events. [2022-11-02 20:57:55,744 INFO L131 PetriNetUnfolder]: For 16216/16335 co-relation queries the response was YES. [2022-11-02 20:57:55,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7687 conditions, 2139 events. 271/2139 cut-off events. For 16216/16335 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 20388 event pairs, 6 based on Foata normal form. 74/2044 useless extension candidates. Maximal degree in co-relation 7624. Up to 366 conditions per place. [2022-11-02 20:57:55,759 INFO L137 encePairwiseOnDemand]: 91/120 looper letters, 103 selfloop transitions, 50 changer transitions 128/323 dead transitions. [2022-11-02 20:57:55,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 323 transitions, 3889 flow [2022-11-02 20:57:55,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-02 20:57:55,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-02 20:57:55,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2672 transitions. [2022-11-02 20:57:55,762 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.4366013071895425 [2022-11-02 20:57:55,762 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2672 transitions. [2022-11-02 20:57:55,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2672 transitions. [2022-11-02 20:57:55,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:57:55,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2672 transitions. [2022-11-02 20:57:55,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 52.3921568627451) internal successors, (2672), 51 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:55,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 120.0) internal successors, (6240), 52 states have internal predecessors, (6240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:55,774 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 120.0) internal successors, (6240), 52 states have internal predecessors, (6240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:55,774 INFO L175 Difference]: Start difference. First operand has 284 places, 241 transitions, 2360 flow. Second operand 51 states and 2672 transitions. [2022-11-02 20:57:55,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 323 transitions, 3889 flow [2022-11-02 20:57:55,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 323 transitions, 3649 flow, removed 63 selfloop flow, removed 36 redundant places. [2022-11-02 20:57:55,840 INFO L231 Difference]: Finished difference. Result has 310 places, 184 transitions, 1606 flow [2022-11-02 20:57:55,840 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=2211, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1606, PETRI_PLACES=310, PETRI_TRANSITIONS=184} [2022-11-02 20:57:55,841 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, 203 predicate places. [2022-11-02 20:57:55,841 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 184 transitions, 1606 flow [2022-11-02 20:57:55,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 51.53225806451613) internal successors, (3195), 62 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:55,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:57:55,842 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:57:55,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:56,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:57:56,071 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 20:57:56,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:56,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1673681930, now seen corresponding path program 11 times [2022-11-02 20:57:56,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:56,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477969389] [2022-11-02 20:57:56,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:56,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:57,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:57,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477969389] [2022-11-02 20:57:57,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477969389] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:57:57,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942067023] [2022-11-02 20:57:57,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:57:57,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:57,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:57:57,735 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:57:57,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:57:57,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-02 20:57:57,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:57:57,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-02 20:57:57,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:57,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:57:58,087 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:57:58,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 20:57:59,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:57:59,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:57:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:59,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:57:59,810 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:57:59,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 38 [2022-11-02 20:57:59,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-02 20:58:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:01,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942067023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:58:01,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:58:01,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 67 [2022-11-02 20:58:01,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158654337] [2022-11-02 20:58:01,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:58:01,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-02 20:58:01,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:01,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-02 20:58:01,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=3999, Unknown=0, NotChecked=0, Total=4422 [2022-11-02 20:58:01,525 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-11-02 20:58:01,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 184 transitions, 1606 flow. Second operand has 67 states, 67 states have (on average 51.582089552238806) internal successors, (3456), 67 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:01,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:58:01,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-11-02 20:58:01,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:58:10,551 INFO L130 PetriNetUnfolder]: 926/5433 cut-off events. [2022-11-02 20:58:10,551 INFO L131 PetriNetUnfolder]: For 63674/63870 co-relation queries the response was YES. [2022-11-02 20:58:10,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22361 conditions, 5433 events. 926/5433 cut-off events. For 63674/63870 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 61320 event pairs, 32 based on Foata normal form. 145/5166 useless extension candidates. Maximal degree in co-relation 22286. Up to 817 conditions per place. [2022-11-02 20:58:10,612 INFO L137 encePairwiseOnDemand]: 93/120 looper letters, 278 selfloop transitions, 214 changer transitions 36/570 dead transitions. [2022-11-02 20:58:10,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 570 transitions, 7987 flow [2022-11-02 20:58:10,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-02 20:58:10,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-11-02 20:58:10,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3613 transitions. [2022-11-02 20:58:10,618 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.44276960784313724 [2022-11-02 20:58:10,618 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3613 transitions. [2022-11-02 20:58:10,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3613 transitions. [2022-11-02 20:58:10,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:58:10,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3613 transitions. [2022-11-02 20:58:10,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 53.13235294117647) internal successors, (3613), 68 states have internal predecessors, (3613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:10,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 120.0) internal successors, (8280), 69 states have internal predecessors, (8280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:10,636 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 120.0) internal successors, (8280), 69 states have internal predecessors, (8280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:10,636 INFO L175 Difference]: Start difference. First operand has 310 places, 184 transitions, 1606 flow. Second operand 68 states and 3613 transitions. [2022-11-02 20:58:10,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 570 transitions, 7987 flow [2022-11-02 20:58:10,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 570 transitions, 6672 flow, removed 573 selfloop flow, removed 61 redundant places. [2022-11-02 20:58:10,825 INFO L231 Difference]: Finished difference. Result has 284 places, 362 transitions, 4948 flow [2022-11-02 20:58:10,825 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1422, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=4948, PETRI_PLACES=284, PETRI_TRANSITIONS=362} [2022-11-02 20:58:10,826 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, 177 predicate places. [2022-11-02 20:58:10,826 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 362 transitions, 4948 flow [2022-11-02 20:58:10,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 51.582089552238806) internal successors, (3456), 67 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:10,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:10,827 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:10,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:11,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:58:11,043 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 20:58:11,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:11,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1413980406, now seen corresponding path program 12 times [2022-11-02 20:58:11,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:11,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771863705] [2022-11-02 20:58:11,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:11,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:12,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:12,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771863705] [2022-11-02 20:58:12,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771863705] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:12,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037002117] [2022-11-02 20:58:12,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:58:12,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:12,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:12,765 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:58:12,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:58:12,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-02 20:58:12,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:58:12,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-02 20:58:12,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:13,099 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-02 20:58:13,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-02 20:58:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 20:58:13,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:58:13,197 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-02 20:58:13,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2022-11-02 20:58:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 20:58:13,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037002117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:58:13,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:58:13,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8, 9] total 31 [2022-11-02 20:58:13,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146646505] [2022-11-02 20:58:13,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:58:13,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 20:58:13,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:13,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 20:58:13,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:58:13,473 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-11-02 20:58:13,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 362 transitions, 4948 flow. Second operand has 31 states, 31 states have (on average 62.38709677419355) internal successors, (1934), 31 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:13,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:58:13,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-11-02 20:58:13,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:58:16,028 INFO L130 PetriNetUnfolder]: 951/5555 cut-off events. [2022-11-02 20:58:16,028 INFO L131 PetriNetUnfolder]: For 44931/45185 co-relation queries the response was YES. [2022-11-02 20:58:16,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20929 conditions, 5555 events. 951/5555 cut-off events. For 44931/45185 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 63572 event pairs, 63 based on Foata normal form. 106/5236 useless extension candidates. Maximal degree in co-relation 20861. Up to 1836 conditions per place. [2022-11-02 20:58:16,104 INFO L137 encePairwiseOnDemand]: 93/120 looper letters, 275 selfloop transitions, 114 changer transitions 25/462 dead transitions. [2022-11-02 20:58:16,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 462 transitions, 6768 flow [2022-11-02 20:58:16,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-02 20:58:16,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-11-02 20:58:16,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2598 transitions. [2022-11-02 20:58:16,110 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5154761904761904 [2022-11-02 20:58:16,110 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2598 transitions. [2022-11-02 20:58:16,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2598 transitions. [2022-11-02 20:58:16,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:58:16,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2598 transitions. [2022-11-02 20:58:16,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 61.857142857142854) internal successors, (2598), 42 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:16,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 120.0) internal successors, (5160), 43 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:16,124 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 120.0) internal successors, (5160), 43 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:16,125 INFO L175 Difference]: Start difference. First operand has 284 places, 362 transitions, 4948 flow. Second operand 42 states and 2598 transitions. [2022-11-02 20:58:16,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 462 transitions, 6768 flow [2022-11-02 20:58:16,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 462 transitions, 6389 flow, removed 163 selfloop flow, removed 31 redundant places. [2022-11-02 20:58:16,278 INFO L231 Difference]: Finished difference. Result has 291 places, 397 transitions, 5387 flow [2022-11-02 20:58:16,279 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=4647, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=5387, PETRI_PLACES=291, PETRI_TRANSITIONS=397} [2022-11-02 20:58:16,280 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, 184 predicate places. [2022-11-02 20:58:16,280 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 397 transitions, 5387 flow [2022-11-02 20:58:16,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 62.38709677419355) internal successors, (1934), 31 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:16,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:16,281 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:16,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:16,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:58:16,495 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 20:58:16,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:16,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1516035590, now seen corresponding path program 13 times [2022-11-02 20:58:16,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:16,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331871345] [2022-11-02 20:58:16,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:16,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:18,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:18,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331871345] [2022-11-02 20:58:18,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331871345] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:18,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600578472] [2022-11-02 20:58:18,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:58:18,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:18,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:18,026 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:58:18,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:58:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:18,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-02 20:58:18,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:19,182 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-02 20:58:19,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-02 20:58:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:19,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:58:19,281 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-02 20:58:19,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2022-11-02 20:58:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:20,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600578472] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:58:20,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:58:20,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 19] total 49 [2022-11-02 20:58:20,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075847404] [2022-11-02 20:58:20,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:58:20,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-02 20:58:20,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:20,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-02 20:58:20,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1837, Unknown=0, NotChecked=0, Total=2352 [2022-11-02 20:58:20,172 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-11-02 20:58:20,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 397 transitions, 5387 flow. Second operand has 49 states, 49 states have (on average 61.0) internal successors, (2989), 49 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:20,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:58:20,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-11-02 20:58:20,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:58:25,707 INFO L130 PetriNetUnfolder]: 1502/8698 cut-off events. [2022-11-02 20:58:25,707 INFO L131 PetriNetUnfolder]: For 69571/69959 co-relation queries the response was YES. [2022-11-02 20:58:25,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31931 conditions, 8698 events. 1502/8698 cut-off events. For 69571/69959 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 108782 event pairs, 15 based on Foata normal form. 327/8340 useless extension candidates. Maximal degree in co-relation 31865. Up to 1204 conditions per place. [2022-11-02 20:58:25,834 INFO L137 encePairwiseOnDemand]: 92/120 looper letters, 243 selfloop transitions, 371 changer transitions 85/747 dead transitions. [2022-11-02 20:58:25,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 747 transitions, 11338 flow [2022-11-02 20:58:25,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-02 20:58:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-11-02 20:58:25,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 4304 transitions. [2022-11-02 20:58:25,841 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5198067632850242 [2022-11-02 20:58:25,841 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 4304 transitions. [2022-11-02 20:58:25,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 4304 transitions. [2022-11-02 20:58:25,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:58:25,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 4304 transitions. [2022-11-02 20:58:25,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 62.3768115942029) internal successors, (4304), 69 states have internal predecessors, (4304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:25,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 120.0) internal successors, (8400), 70 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:25,860 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 120.0) internal successors, (8400), 70 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:25,860 INFO L175 Difference]: Start difference. First operand has 291 places, 397 transitions, 5387 flow. Second operand 69 states and 4304 transitions. [2022-11-02 20:58:25,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 747 transitions, 11338 flow [2022-11-02 20:58:26,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 747 transitions, 11076 flow, removed 93 selfloop flow, removed 31 redundant places. [2022-11-02 20:58:26,145 INFO L231 Difference]: Finished difference. Result has 358 places, 525 transitions, 8625 flow [2022-11-02 20:58:26,146 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=5088, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=8625, PETRI_PLACES=358, PETRI_TRANSITIONS=525} [2022-11-02 20:58:26,147 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, 251 predicate places. [2022-11-02 20:58:26,147 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 525 transitions, 8625 flow [2022-11-02 20:58:26,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 61.0) internal successors, (2989), 49 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:26,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:26,148 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:26,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:26,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:26,370 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 20:58:26,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:26,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1879919168, now seen corresponding path program 14 times [2022-11-02 20:58:26,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:26,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137429476] [2022-11-02 20:58:26,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:26,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:26,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:28,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:28,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137429476] [2022-11-02 20:58:28,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137429476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:28,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421840077] [2022-11-02 20:58:28,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:58:28,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:28,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:28,078 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:58:28,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:58:28,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:58:28,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:58:28,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-02 20:58:28,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:29,236 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-02 20:58:29,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-02 20:58:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:29,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:58:29,342 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-02 20:58:29,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2022-11-02 20:58:30,339 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:30,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421840077] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:58:30,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:58:30,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 19] total 51 [2022-11-02 20:58:30,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862752393] [2022-11-02 20:58:30,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:58:30,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-02 20:58:30,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:30,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-02 20:58:30,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=2151, Unknown=0, NotChecked=0, Total=2550 [2022-11-02 20:58:30,345 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-11-02 20:58:30,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 525 transitions, 8625 flow. Second operand has 51 states, 51 states have (on average 61.03921568627451) internal successors, (3113), 51 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:30,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:58:30,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-11-02 20:58:30,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:58:39,296 INFO L130 PetriNetUnfolder]: 1981/11355 cut-off events. [2022-11-02 20:58:39,296 INFO L131 PetriNetUnfolder]: For 137245/137692 co-relation queries the response was YES. [2022-11-02 20:58:39,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48662 conditions, 11355 events. 1981/11355 cut-off events. For 137245/137692 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 149453 event pairs, 31 based on Foata normal form. 311/10754 useless extension candidates. Maximal degree in co-relation 48567. Up to 1621 conditions per place. [2022-11-02 20:58:39,537 INFO L137 encePairwiseOnDemand]: 96/120 looper letters, 310 selfloop transitions, 470 changer transitions 83/911 dead transitions. [2022-11-02 20:58:39,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 911 transitions, 16552 flow [2022-11-02 20:58:39,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-02 20:58:39,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2022-11-02 20:58:39,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 4942 transitions. [2022-11-02 20:58:39,549 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5213080168776372 [2022-11-02 20:58:39,549 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 4942 transitions. [2022-11-02 20:58:39,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 4942 transitions. [2022-11-02 20:58:39,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:58:39,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 4942 transitions. [2022-11-02 20:58:39,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 62.55696202531646) internal successors, (4942), 79 states have internal predecessors, (4942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:39,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 120.0) internal successors, (9600), 80 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:39,579 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 120.0) internal successors, (9600), 80 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:39,580 INFO L175 Difference]: Start difference. First operand has 358 places, 525 transitions, 8625 flow. Second operand 79 states and 4942 transitions. [2022-11-02 20:58:39,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 911 transitions, 16552 flow [2022-11-02 20:58:40,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 911 transitions, 15537 flow, removed 481 selfloop flow, removed 40 redundant places. [2022-11-02 20:58:40,280 INFO L231 Difference]: Finished difference. Result has 417 places, 635 transitions, 11903 flow [2022-11-02 20:58:40,281 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=8208, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=11903, PETRI_PLACES=417, PETRI_TRANSITIONS=635} [2022-11-02 20:58:40,281 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, 310 predicate places. [2022-11-02 20:58:40,281 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 635 transitions, 11903 flow [2022-11-02 20:58:40,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 61.03921568627451) internal successors, (3113), 51 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:40,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:40,282 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:40,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:40,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:58:40,483 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 20:58:40,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:40,483 INFO L85 PathProgramCache]: Analyzing trace with hash -705502648, now seen corresponding path program 15 times [2022-11-02 20:58:40,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:40,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286462350] [2022-11-02 20:58:40,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:40,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:42,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:42,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286462350] [2022-11-02 20:58:42,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286462350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:42,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896927714] [2022-11-02 20:58:42,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:58:42,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:42,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:42,911 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:58:42,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:58:43,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:58:43,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:58:43,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-02 20:58:43,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:43,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:58:43,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:58:43,951 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-02 20:58:43,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-02 20:58:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 20:58:43,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:58:44,352 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:58:44,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 38 [2022-11-02 20:58:44,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-02 20:58:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 20:58:45,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896927714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:58:45,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:58:45,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16, 16] total 48 [2022-11-02 20:58:45,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241019917] [2022-11-02 20:58:45,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:58:45,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-02 20:58:45,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:45,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-02 20:58:45,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2071, Unknown=2, NotChecked=0, Total=2256 [2022-11-02 20:58:45,466 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-11-02 20:58:45,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 635 transitions, 11903 flow. Second operand has 48 states, 48 states have (on average 52.125) internal successors, (2502), 48 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:45,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:58:45,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-11-02 20:58:45,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:58:55,578 INFO L130 PetriNetUnfolder]: 2150/11944 cut-off events. [2022-11-02 20:58:55,578 INFO L131 PetriNetUnfolder]: For 167130/167623 co-relation queries the response was YES. [2022-11-02 20:58:55,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54287 conditions, 11944 events. 2150/11944 cut-off events. For 167130/167623 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 158956 event pairs, 96 based on Foata normal form. 126/11116 useless extension candidates. Maximal degree in co-relation 54170. Up to 4291 conditions per place. [2022-11-02 20:58:55,864 INFO L137 encePairwiseOnDemand]: 92/120 looper letters, 565 selfloop transitions, 218 changer transitions 15/840 dead transitions. [2022-11-02 20:58:55,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 840 transitions, 17150 flow [2022-11-02 20:58:55,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-02 20:58:55,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-11-02 20:58:55,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 2993 transitions. [2022-11-02 20:58:55,870 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.43757309941520467 [2022-11-02 20:58:55,870 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 2993 transitions. [2022-11-02 20:58:55,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 2993 transitions. [2022-11-02 20:58:55,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:58:55,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 2993 transitions. [2022-11-02 20:58:55,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 52.50877192982456) internal successors, (2993), 57 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:55,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 120.0) internal successors, (6960), 58 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:55,886 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 120.0) internal successors, (6960), 58 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:55,886 INFO L175 Difference]: Start difference. First operand has 417 places, 635 transitions, 11903 flow. Second operand 57 states and 2993 transitions. [2022-11-02 20:58:55,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 840 transitions, 17150 flow [2022-11-02 20:58:57,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 840 transitions, 16410 flow, removed 282 selfloop flow, removed 53 redundant places. [2022-11-02 20:58:57,113 INFO L231 Difference]: Finished difference. Result has 416 places, 777 transitions, 14859 flow [2022-11-02 20:58:57,114 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=11341, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=14859, PETRI_PLACES=416, PETRI_TRANSITIONS=777} [2022-11-02 20:58:57,115 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, 309 predicate places. [2022-11-02 20:58:57,115 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 777 transitions, 14859 flow [2022-11-02 20:58:57,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 52.125) internal successors, (2502), 48 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:57,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:57,116 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:57,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:57,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:57,317 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 20:58:57,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:57,318 INFO L85 PathProgramCache]: Analyzing trace with hash 549185970, now seen corresponding path program 16 times [2022-11-02 20:58:57,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:57,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28535375] [2022-11-02 20:58:57,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:57,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:59,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:59,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28535375] [2022-11-02 20:58:59,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28535375] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:59,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862805679] [2022-11-02 20:58:59,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:58:59,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:59,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:59,555 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:58:59,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:58:59,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:58:59,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:58:59,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-02 20:58:59,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:00,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:59:00,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-02 20:59:01,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-02 20:59:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:59:01,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:01,294 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_524 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_524) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2022-11-02 20:59:01,315 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:59:01,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 41 [2022-11-02 20:59:01,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-02 20:59:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:59:03,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862805679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:03,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:03,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 68 [2022-11-02 20:59:03,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883820129] [2022-11-02 20:59:03,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:03,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-02 20:59:03,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:03,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-02 20:59:03,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=4126, Unknown=1, NotChecked=130, Total=4556 [2022-11-02 20:59:03,193 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-11-02 20:59:03,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 777 transitions, 14859 flow. Second operand has 68 states, 68 states have (on average 51.55882352941177) internal successors, (3506), 68 states have internal predecessors, (3506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:03,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:59:03,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-11-02 20:59:03,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:59:18,918 INFO L130 PetriNetUnfolder]: 3509/19035 cut-off events. [2022-11-02 20:59:18,918 INFO L131 PetriNetUnfolder]: For 294673/295563 co-relation queries the response was YES. [2022-11-02 20:59:19,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87936 conditions, 19035 events. 3509/19035 cut-off events. For 294673/295563 co-relation queries the response was YES. Maximal size of possible extension queue 1072. Compared 273781 event pairs, 38 based on Foata normal form. 489/18032 useless extension candidates. Maximal degree in co-relation 87825. Up to 4191 conditions per place. [2022-11-02 20:59:19,341 INFO L137 encePairwiseOnDemand]: 91/120 looper letters, 705 selfloop transitions, 669 changer transitions 56/1472 dead transitions. [2022-11-02 20:59:19,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 1472 transitions, 30710 flow [2022-11-02 20:59:19,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-02 20:59:19,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-11-02 20:59:19,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3616 transitions. [2022-11-02 20:59:19,347 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.44313725490196076 [2022-11-02 20:59:19,347 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3616 transitions. [2022-11-02 20:59:19,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3616 transitions. [2022-11-02 20:59:19,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:59:19,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3616 transitions. [2022-11-02 20:59:19,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 53.1764705882353) internal successors, (3616), 68 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:19,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 120.0) internal successors, (8280), 69 states have internal predecessors, (8280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:19,358 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 120.0) internal successors, (8280), 69 states have internal predecessors, (8280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:19,359 INFO L175 Difference]: Start difference. First operand has 416 places, 777 transitions, 14859 flow. Second operand 68 states and 3616 transitions. [2022-11-02 20:59:19,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 1472 transitions, 30710 flow [2022-11-02 20:59:21,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 1472 transitions, 29794 flow, removed 345 selfloop flow, removed 33 redundant places. [2022-11-02 20:59:21,049 INFO L231 Difference]: Finished difference. Result has 470 places, 1187 transitions, 25869 flow [2022-11-02 20:59:21,050 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=14297, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=25869, PETRI_PLACES=470, PETRI_TRANSITIONS=1187} [2022-11-02 20:59:21,050 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, 363 predicate places. [2022-11-02 20:59:21,051 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 1187 transitions, 25869 flow [2022-11-02 20:59:21,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 51.55882352941177) internal successors, (3506), 68 states have internal predecessors, (3506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:21,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:59:21,052 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:21,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-02 20:59:21,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:21,263 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 20:59:21,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:21,263 INFO L85 PathProgramCache]: Analyzing trace with hash 2085829488, now seen corresponding path program 17 times [2022-11-02 20:59:21,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:21,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482440533] [2022-11-02 20:59:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:21,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:59:23,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:23,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482440533] [2022-11-02 20:59:23,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482440533] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:23,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681372933] [2022-11-02 20:59:23,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:59:23,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:23,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:23,085 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:23,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf1f78-9e03-4a92-a844-05cf9391b766/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:59:23,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-02 20:59:23,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:23,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-02 20:59:23,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:23,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-02 20:59:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:59:23,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:23,767 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-02 20:59:23,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2022-11-02 20:59:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-02 20:59:23,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681372933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:23,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:23,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13, 8] total 32 [2022-11-02 20:59:23,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669819869] [2022-11-02 20:59:23,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:23,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-02 20:59:23,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:23,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-02 20:59:23,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2022-11-02 20:59:23,963 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-11-02 20:59:23,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 1187 transitions, 25869 flow. Second operand has 32 states, 32 states have (on average 61.53125) internal successors, (1969), 32 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:23,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:59:23,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-11-02 20:59:23,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand