./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longer-2.i --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_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/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_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longer-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/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_54961422-566b-47d9-aa17-edea955bb14d/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 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 --- 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 20:39:49,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:39:49,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:39:49,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:39:49,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:39:49,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:39:49,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:39:49,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:39:49,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:39:49,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:39:49,764 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:39:49,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:39:49,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:39:49,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:39:49,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:39:49,775 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:39:49,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:39:49,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:39:49,781 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:39:49,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:39:49,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:39:49,795 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:39:49,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:39:49,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:39:49,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:39:49,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:39:49,812 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:39:49,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:39:49,815 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:39:49,816 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:39:49,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:39:49,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:39:49,822 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:39:49,824 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:39:49,825 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:39:49,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:39:49,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:39:49,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:39:49,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:39:49,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:39:49,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:39:49,830 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:39:49,880 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:39:49,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:39:49,882 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:39:49,882 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:39:49,883 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:39:49,884 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:39:49,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:39:49,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:39:49,886 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:39:49,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:39:49,887 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:39:49,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:39:49,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:39:49,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:39:49,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:39:49,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:39:49,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:39:49,890 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:39:49,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:39:49,890 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:39:49,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:39:49,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:39:49,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:39:49,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:39:49,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:39:49,893 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:39:49,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:39:49,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:39:49,894 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:39:49,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:39:49,894 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:39:49,895 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:39:49,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:39:49,896 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_54961422-566b-47d9-aa17-edea955bb14d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 [2022-11-02 20:39:50,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:39:50,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:39:50,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:39:50,301 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:39:50,303 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:39:50,304 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/pthread/stack_longer-2.i [2022-11-02 20:39:50,397 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/data/106043ed6/c93b38b69215493a83b959ba71199018/FLAG67e1a7488 [2022-11-02 20:39:51,061 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:39:51,062 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/sv-benchmarks/c/pthread/stack_longer-2.i [2022-11-02 20:39:51,079 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/data/106043ed6/c93b38b69215493a83b959ba71199018/FLAG67e1a7488 [2022-11-02 20:39:51,301 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/data/106043ed6/c93b38b69215493a83b959ba71199018 [2022-11-02 20:39:51,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:39:51,306 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:39:51,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:39:51,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:39:51,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:39:51,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:39:51" (1/1) ... [2022-11-02 20:39:51,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a6f16aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:51, skipping insertion in model container [2022-11-02 20:39:51,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:39:51" (1/1) ... [2022-11-02 20:39:51,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:39:51,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:39:51,976 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_54961422-566b-47d9-aa17-edea955bb14d/sv-benchmarks/c/pthread/stack_longer-2.i[41529,41542] [2022-11-02 20:39:52,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:39:52,029 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:39:52,079 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_54961422-566b-47d9-aa17-edea955bb14d/sv-benchmarks/c/pthread/stack_longer-2.i[41529,41542] [2022-11-02 20:39:52,088 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:39:52,140 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:39:52,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:52 WrapperNode [2022-11-02 20:39:52,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:39:52,142 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:39:52,143 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:39:52,143 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:39:52,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:52" (1/1) ... [2022-11-02 20:39:52,185 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:52" (1/1) ... [2022-11-02 20:39:52,246 INFO L138 Inliner]: procedures = 277, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 150 [2022-11-02 20:39:52,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:39:52,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:39:52,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:39:52,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:39:52,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:52" (1/1) ... [2022-11-02 20:39:52,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:52" (1/1) ... [2022-11-02 20:39:52,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:52" (1/1) ... [2022-11-02 20:39:52,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:52" (1/1) ... [2022-11-02 20:39:52,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:52" (1/1) ... [2022-11-02 20:39:52,299 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:52" (1/1) ... [2022-11-02 20:39:52,301 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:52" (1/1) ... [2022-11-02 20:39:52,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:52" (1/1) ... [2022-11-02 20:39:52,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:39:52,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:39:52,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:39:52,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:39:52,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:52" (1/1) ... [2022-11-02 20:39:52,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:39:52,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:52,353 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:39:52,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:39:52,403 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-02 20:39:52,403 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-02 20:39:52,404 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-02 20:39:52,404 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-02 20:39:52,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:39:52,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:39:52,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:39:52,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:39:52,405 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-02 20:39:52,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:39:52,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:39:52,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:39:52,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:39:52,407 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 20:39:52,585 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:39:52,587 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:39:52,977 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:39:52,986 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:39:52,986 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:39:53,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:39:53 BoogieIcfgContainer [2022-11-02 20:39:53,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:39:53,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:39:53,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:39:53,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:39:53,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:39:51" (1/3) ... [2022-11-02 20:39:53,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39479116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:39:53, skipping insertion in model container [2022-11-02 20:39:53,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:52" (2/3) ... [2022-11-02 20:39:53,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39479116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:39:53, skipping insertion in model container [2022-11-02 20:39:53,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:39:53" (3/3) ... [2022-11-02 20:39:53,012 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2022-11-02 20:39:53,021 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:39:53,032 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:39:53,032 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-02 20:39:53,033 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:39:53,178 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-02 20:39:53,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 172 transitions, 360 flow [2022-11-02 20:39:53,350 INFO L130 PetriNetUnfolder]: 10/170 cut-off events. [2022-11-02 20:39:53,350 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:39:53,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 170 events. 10/170 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 414 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2022-11-02 20:39:53,357 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 172 transitions, 360 flow [2022-11-02 20:39:53,365 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 160 transitions, 329 flow [2022-11-02 20:39:53,377 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:39:53,383 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;@2d83f01c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:39:53,384 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-02 20:39:53,444 INFO L130 PetriNetUnfolder]: 5/129 cut-off events. [2022-11-02 20:39:53,445 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:39:53,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:39:53,446 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] [2022-11-02 20:39:53,446 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:39:53,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:53,452 INFO L85 PathProgramCache]: Analyzing trace with hash -2105074172, now seen corresponding path program 1 times [2022-11-02 20:39:53,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:53,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403692486] [2022-11-02 20:39:53,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:53,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:53,877 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 20:39:53,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:53,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403692486] [2022-11-02 20:39:53,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403692486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:53,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:53,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:39:53,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498541064] [2022-11-02 20:39:53,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:53,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:39:53,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:53,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:39:53,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:39:53,932 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 172 [2022-11-02 20:39:53,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 160 transitions, 329 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:53,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:39:53,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 172 [2022-11-02 20:39:53,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:39:54,194 INFO L130 PetriNetUnfolder]: 88/699 cut-off events. [2022-11-02 20:39:54,194 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-11-02 20:39:54,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 699 events. 88/699 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3112 event pairs, 32 based on Foata normal form. 69/702 useless extension candidates. Maximal degree in co-relation 747. Up to 111 conditions per place. [2022-11-02 20:39:54,207 INFO L137 encePairwiseOnDemand]: 162/172 looper letters, 20 selfloop transitions, 3 changer transitions 0/158 dead transitions. [2022-11-02 20:39:54,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 158 transitions, 377 flow [2022-11-02 20:39:54,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:39:54,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:39:54,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2022-11-02 20:39:54,231 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9282945736434108 [2022-11-02 20:39:54,232 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2022-11-02 20:39:54,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2022-11-02 20:39:54,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:39:54,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2022-11-02 20:39:54,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:54,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:54,253 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:54,255 INFO L175 Difference]: Start difference. First operand has 157 places, 160 transitions, 329 flow. Second operand 3 states and 479 transitions. [2022-11-02 20:39:54,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 158 transitions, 377 flow [2022-11-02 20:39:54,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 158 transitions, 369 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-02 20:39:54,268 INFO L231 Difference]: Finished difference. Result has 153 places, 152 transitions, 323 flow [2022-11-02 20:39:54,271 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=323, PETRI_PLACES=153, PETRI_TRANSITIONS=152} [2022-11-02 20:39:54,275 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, -4 predicate places. [2022-11-02 20:39:54,276 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 152 transitions, 323 flow [2022-11-02 20:39:54,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:54,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:39:54,277 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] [2022-11-02 20:39:54,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:39:54,278 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:39:54,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:54,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1103212847, now seen corresponding path program 1 times [2022-11-02 20:39:54,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:54,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345865539] [2022-11-02 20:39:54,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:54,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:54,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:54,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345865539] [2022-11-02 20:39:54,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345865539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:54,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:54,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:39:54,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156481070] [2022-11-02 20:39:54,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:54,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:39:54,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:54,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:39:54,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:39:54,558 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 172 [2022-11-02 20:39:54,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 152 transitions, 323 flow. Second operand has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:54,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:39:54,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 172 [2022-11-02 20:39:54,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:39:54,753 INFO L130 PetriNetUnfolder]: 34/590 cut-off events. [2022-11-02 20:39:54,753 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-02 20:39:54,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 711 conditions, 590 events. 34/590 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2053 event pairs, 11 based on Foata normal form. 0/553 useless extension candidates. Maximal degree in co-relation 411. Up to 45 conditions per place. [2022-11-02 20:39:54,759 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 16 selfloop transitions, 4 changer transitions 0/160 dead transitions. [2022-11-02 20:39:54,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 160 transitions, 384 flow [2022-11-02 20:39:54,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:39:54,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-02 20:39:54,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 629 transitions. [2022-11-02 20:39:54,763 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9142441860465116 [2022-11-02 20:39:54,763 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 629 transitions. [2022-11-02 20:39:54,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 629 transitions. [2022-11-02 20:39:54,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:39:54,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 629 transitions. [2022-11-02 20:39:54,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:54,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:54,770 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:54,771 INFO L175 Difference]: Start difference. First operand has 153 places, 152 transitions, 323 flow. Second operand 4 states and 629 transitions. [2022-11-02 20:39:54,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 160 transitions, 384 flow [2022-11-02 20:39:54,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 160 transitions, 381 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:39:54,780 INFO L231 Difference]: Finished difference. Result has 157 places, 155 transitions, 348 flow [2022-11-02 20:39:54,780 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=348, PETRI_PLACES=157, PETRI_TRANSITIONS=155} [2022-11-02 20:39:54,781 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 0 predicate places. [2022-11-02 20:39:54,782 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 155 transitions, 348 flow [2022-11-02 20:39:54,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:54,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:39:54,783 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] [2022-11-02 20:39:54,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:39:54,784 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:39:54,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:54,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1628458080, now seen corresponding path program 1 times [2022-11-02 20:39:54,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:54,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754006160] [2022-11-02 20:39:54,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:54,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:55,006 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 20:39:55,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:55,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754006160] [2022-11-02 20:39:55,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754006160] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:55,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:55,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:39:55,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687089579] [2022-11-02 20:39:55,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:55,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:39:55,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:55,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:39:55,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:39:55,016 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 172 [2022-11-02 20:39:55,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 155 transitions, 348 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:55,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:39:55,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 172 [2022-11-02 20:39:55,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:39:55,381 INFO L130 PetriNetUnfolder]: 127/1267 cut-off events. [2022-11-02 20:39:55,382 INFO L131 PetriNetUnfolder]: For 90/100 co-relation queries the response was YES. [2022-11-02 20:39:55,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1672 conditions, 1267 events. 127/1267 cut-off events. For 90/100 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6944 event pairs, 33 based on Foata normal form. 12/1205 useless extension candidates. Maximal degree in co-relation 1334. Up to 135 conditions per place. [2022-11-02 20:39:55,392 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 25 selfloop transitions, 4 changer transitions 0/167 dead transitions. [2022-11-02 20:39:55,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 167 transitions, 439 flow [2022-11-02 20:39:55,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:39:55,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:39:55,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2022-11-02 20:39:55,395 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9186046511627907 [2022-11-02 20:39:55,395 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2022-11-02 20:39:55,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2022-11-02 20:39:55,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:39:55,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2022-11-02 20:39:55,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:55,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:55,401 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:55,402 INFO L175 Difference]: Start difference. First operand has 157 places, 155 transitions, 348 flow. Second operand 3 states and 474 transitions. [2022-11-02 20:39:55,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 167 transitions, 439 flow [2022-11-02 20:39:55,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 167 transitions, 437 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:39:55,411 INFO L231 Difference]: Finished difference. Result has 160 places, 159 transitions, 388 flow [2022-11-02 20:39:55,412 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=388, PETRI_PLACES=160, PETRI_TRANSITIONS=159} [2022-11-02 20:39:55,414 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 3 predicate places. [2022-11-02 20:39:55,414 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 159 transitions, 388 flow [2022-11-02 20:39:55,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:55,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:39:55,416 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:55,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:39:55,416 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:39:55,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:55,417 INFO L85 PathProgramCache]: Analyzing trace with hash 585023441, now seen corresponding path program 1 times [2022-11-02 20:39:55,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:55,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057728808] [2022-11-02 20:39:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:55,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:55,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:55,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:55,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057728808] [2022-11-02 20:39:55,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057728808] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:55,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92271086] [2022-11-02 20:39:55,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:55,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:55,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:55,784 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:55,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:39:55,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:55,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:39:55,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:56,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:56,322 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:56,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92271086] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:56,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:39:56,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:39:56,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710978869] [2022-11-02 20:39:56,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:56,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:39:56,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:56,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:39:56,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:39:56,328 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 172 [2022-11-02 20:39:56,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 159 transitions, 388 flow. Second operand has 10 states, 10 states have (on average 148.5) internal successors, (1485), 10 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:56,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:39:56,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 172 [2022-11-02 20:39:56,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:39:57,084 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([465] L1008-->L1008-1: Formula: (not (< 0 v_~top~0_13)) InVars {~top~0=v_~top~0_13} OutVars{~top~0=v_~top~0_13} AuxVars[] AssignedVars[][178], [Black: 174#(= ~top~0 0), 113#L945-2true, 30#L1008-1true, Black: 182#(and (= |t1Thread1of1ForFork0_push_#res#1| 0) (= |t1Thread1of1ForFork0_#t~ret42#1| 0)), Black: 179#(= |t1Thread1of1ForFork0_push_#res#1| 0), 186#true, t2Thread1of1ForFork1InUse, 19#L1022-4true, 230#(<= ~top~0 0), Black: 188#(<= 1 ~top~0)]) [2022-11-02 20:39:57,085 INFO L383 tUnfolder$Statistics]: this new event has 185 ancestors and is cut-off event [2022-11-02 20:39:57,088 INFO L386 tUnfolder$Statistics]: existing Event has 165 ancestors and is cut-off event [2022-11-02 20:39:57,088 INFO L386 tUnfolder$Statistics]: existing Event has 164 ancestors and is cut-off event [2022-11-02 20:39:57,088 INFO L386 tUnfolder$Statistics]: existing Event has 157 ancestors and is cut-off event [2022-11-02 20:39:57,089 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([464] L1008-->L1010: Formula: (< 0 v_~top~0_7) InVars {~top~0=v_~top~0_7} OutVars{~top~0=v_~top~0_7} AuxVars[] AssignedVars[][179], [Black: 174#(= ~top~0 0), 72#L1010true, 113#L945-2true, Black: 182#(and (= |t1Thread1of1ForFork0_push_#res#1| 0) (= |t1Thread1of1ForFork0_#t~ret42#1| 0)), 192#true, Black: 179#(= |t1Thread1of1ForFork0_push_#res#1| 0), t2Thread1of1ForFork1InUse, 19#L1022-4true, 188#(<= 1 ~top~0), Black: 186#true]) [2022-11-02 20:39:57,089 INFO L383 tUnfolder$Statistics]: this new event has 185 ancestors and is cut-off event [2022-11-02 20:39:57,089 INFO L386 tUnfolder$Statistics]: existing Event has 165 ancestors and is cut-off event [2022-11-02 20:39:57,090 INFO L386 tUnfolder$Statistics]: existing Event has 164 ancestors and is cut-off event [2022-11-02 20:39:57,090 INFO L386 tUnfolder$Statistics]: existing Event has 157 ancestors and is cut-off event [2022-11-02 20:39:57,185 INFO L130 PetriNetUnfolder]: 387/2990 cut-off events. [2022-11-02 20:39:57,191 INFO L131 PetriNetUnfolder]: For 1008/1064 co-relation queries the response was YES. [2022-11-02 20:39:57,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4470 conditions, 2990 events. 387/2990 cut-off events. For 1008/1064 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 21596 event pairs, 43 based on Foata normal form. 40/2871 useless extension candidates. Maximal degree in co-relation 3934. Up to 300 conditions per place. [2022-11-02 20:39:57,211 INFO L137 encePairwiseOnDemand]: 163/172 looper letters, 86 selfloop transitions, 46 changer transitions 1/269 dead transitions. [2022-11-02 20:39:57,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 269 transitions, 1070 flow [2022-11-02 20:39:57,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:39:57,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-02 20:39:57,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2759 transitions. [2022-11-02 20:39:57,218 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8911498708010336 [2022-11-02 20:39:57,218 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2759 transitions. [2022-11-02 20:39:57,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2759 transitions. [2022-11-02 20:39:57,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:39:57,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2759 transitions. [2022-11-02 20:39:57,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 153.27777777777777) internal successors, (2759), 18 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:57,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 172.0) internal successors, (3268), 19 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:57,234 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 172.0) internal successors, (3268), 19 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:57,234 INFO L175 Difference]: Start difference. First operand has 160 places, 159 transitions, 388 flow. Second operand 18 states and 2759 transitions. [2022-11-02 20:39:57,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 269 transitions, 1070 flow [2022-11-02 20:39:57,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 269 transitions, 1008 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-11-02 20:39:57,247 INFO L231 Difference]: Finished difference. Result has 181 places, 214 transitions, 759 flow [2022-11-02 20:39:57,247 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=759, PETRI_PLACES=181, PETRI_TRANSITIONS=214} [2022-11-02 20:39:57,249 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 24 predicate places. [2022-11-02 20:39:57,249 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 214 transitions, 759 flow [2022-11-02 20:39:57,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 148.5) internal successors, (1485), 10 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:57,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:39:57,250 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:57,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:57,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:57,461 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:39:57,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:57,462 INFO L85 PathProgramCache]: Analyzing trace with hash -240965741, now seen corresponding path program 1 times [2022-11-02 20:39:57,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:57,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727466828] [2022-11-02 20:39:57,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:57,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:57,658 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 20:39:57,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:57,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727466828] [2022-11-02 20:39:57,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727466828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:57,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:57,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:39:57,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278927098] [2022-11-02 20:39:57,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:57,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:39:57,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:57,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:39:57,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:39:57,663 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 172 [2022-11-02 20:39:57,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 214 transitions, 759 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:57,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:39:57,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 172 [2022-11-02 20:39:57,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:39:57,904 INFO L130 PetriNetUnfolder]: 53/1113 cut-off events. [2022-11-02 20:39:57,905 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2022-11-02 20:39:57,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1520 conditions, 1113 events. 53/1113 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4912 event pairs, 9 based on Foata normal form. 17/1088 useless extension candidates. Maximal degree in co-relation 997. Up to 49 conditions per place. [2022-11-02 20:39:57,912 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 12 selfloop transitions, 4 changer transitions 0/173 dead transitions. [2022-11-02 20:39:57,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 173 transitions, 536 flow [2022-11-02 20:39:57,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:39:57,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:39:57,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2022-11-02 20:39:57,914 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9069767441860465 [2022-11-02 20:39:57,914 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2022-11-02 20:39:57,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2022-11-02 20:39:57,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:39:57,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2022-11-02 20:39:57,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 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 20:39:57,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:57,918 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:57,918 INFO L175 Difference]: Start difference. First operand has 181 places, 214 transitions, 759 flow. Second operand 3 states and 468 transitions. [2022-11-02 20:39:57,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 173 transitions, 536 flow [2022-11-02 20:39:57,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 173 transitions, 514 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-11-02 20:39:57,924 INFO L231 Difference]: Finished difference. Result has 171 places, 171 transitions, 483 flow [2022-11-02 20:39:57,925 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=483, PETRI_PLACES=171, PETRI_TRANSITIONS=171} [2022-11-02 20:39:57,926 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 14 predicate places. [2022-11-02 20:39:57,926 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 171 transitions, 483 flow [2022-11-02 20:39:57,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:57,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:39:57,927 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:57,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:39:57,927 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:39:57,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:57,928 INFO L85 PathProgramCache]: Analyzing trace with hash 230931441, now seen corresponding path program 1 times [2022-11-02 20:39:57,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:57,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871468867] [2022-11-02 20:39:57,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:57,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:00,680 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 20:40:00,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:00,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871468867] [2022-11-02 20:40:00,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871468867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:00,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:00,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-11-02 20:40:00,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773561811] [2022-11-02 20:40:00,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:00,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-02 20:40:00,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:00,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-02 20:40:00,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:40:00,688 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 172 [2022-11-02 20:40:00,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 171 transitions, 483 flow. Second operand has 30 states, 30 states have (on average 85.23333333333333) internal successors, (2557), 30 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:00,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:40:00,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 172 [2022-11-02 20:40:00,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:40:04,600 INFO L130 PetriNetUnfolder]: 1065/4236 cut-off events. [2022-11-02 20:40:04,600 INFO L131 PetriNetUnfolder]: For 781/781 co-relation queries the response was YES. [2022-11-02 20:40:04,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7972 conditions, 4236 events. 1065/4236 cut-off events. For 781/781 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 31527 event pairs, 73 based on Foata normal form. 0/4095 useless extension candidates. Maximal degree in co-relation 5815. Up to 1366 conditions per place. [2022-11-02 20:40:04,635 INFO L137 encePairwiseOnDemand]: 137/172 looper letters, 264 selfloop transitions, 37 changer transitions 2/379 dead transitions. [2022-11-02 20:40:04,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 379 transitions, 1680 flow [2022-11-02 20:40:04,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 20:40:04,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-02 20:40:04,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3092 transitions. [2022-11-02 20:40:04,646 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5287277701778386 [2022-11-02 20:40:04,646 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3092 transitions. [2022-11-02 20:40:04,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3092 transitions. [2022-11-02 20:40:04,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:40:04,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3092 transitions. [2022-11-02 20:40:04,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 90.94117647058823) internal successors, (3092), 34 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:04,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 172.0) internal successors, (6020), 35 states have internal predecessors, (6020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:04,671 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 172.0) internal successors, (6020), 35 states have internal predecessors, (6020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:04,671 INFO L175 Difference]: Start difference. First operand has 171 places, 171 transitions, 483 flow. Second operand 34 states and 3092 transitions. [2022-11-02 20:40:04,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 379 transitions, 1680 flow [2022-11-02 20:40:04,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 379 transitions, 1676 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:40:04,682 INFO L231 Difference]: Finished difference. Result has 226 places, 200 transitions, 724 flow [2022-11-02 20:40:04,683 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=724, PETRI_PLACES=226, PETRI_TRANSITIONS=200} [2022-11-02 20:40:04,684 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 69 predicate places. [2022-11-02 20:40:04,684 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 200 transitions, 724 flow [2022-11-02 20:40:04,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 85.23333333333333) internal successors, (2557), 30 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:04,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:40:04,686 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:40:04,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:40:04,687 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:40:04,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:04,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1232739005, now seen corresponding path program 1 times [2022-11-02 20:40:04,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:04,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404304302] [2022-11-02 20:40:04,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:04,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:04,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:04,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404304302] [2022-11-02 20:40:04,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404304302] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:40:04,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307428336] [2022-11-02 20:40:04,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:04,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:04,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:04,945 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:40:04,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:40:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:05,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:40:05,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:40:05,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:40:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:40:05,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307428336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:40:05,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:40:05,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-11-02 20:40:05,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478651386] [2022-11-02 20:40:05,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:40:05,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:40:05,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:05,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:40:05,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:40:05,542 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 172 [2022-11-02 20:40:05,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 200 transitions, 724 flow. Second operand has 12 states, 12 states have (on average 147.5) internal successors, (1770), 12 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:05,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:40:05,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 172 [2022-11-02 20:40:05,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:40:06,184 INFO L130 PetriNetUnfolder]: 147/1995 cut-off events. [2022-11-02 20:40:06,185 INFO L131 PetriNetUnfolder]: For 707/707 co-relation queries the response was YES. [2022-11-02 20:40:06,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3517 conditions, 1995 events. 147/1995 cut-off events. For 707/707 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 12044 event pairs, 27 based on Foata normal form. 9/1962 useless extension candidates. Maximal degree in co-relation 2527. Up to 76 conditions per place. [2022-11-02 20:40:06,206 INFO L137 encePairwiseOnDemand]: 161/172 looper letters, 50 selfloop transitions, 39 changer transitions 0/243 dead transitions. [2022-11-02 20:40:06,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 243 transitions, 1070 flow [2022-11-02 20:40:06,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:40:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-02 20:40:06,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2665 transitions. [2022-11-02 20:40:06,213 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8607881136950905 [2022-11-02 20:40:06,214 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2665 transitions. [2022-11-02 20:40:06,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2665 transitions. [2022-11-02 20:40:06,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:40:06,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2665 transitions. [2022-11-02 20:40:06,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 148.05555555555554) internal successors, (2665), 18 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:06,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 172.0) internal successors, (3268), 19 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:06,236 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 172.0) internal successors, (3268), 19 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:06,237 INFO L175 Difference]: Start difference. First operand has 226 places, 200 transitions, 724 flow. Second operand 18 states and 2665 transitions. [2022-11-02 20:40:06,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 243 transitions, 1070 flow [2022-11-02 20:40:06,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 243 transitions, 1052 flow, removed 2 selfloop flow, removed 7 redundant places. [2022-11-02 20:40:06,254 INFO L231 Difference]: Finished difference. Result has 240 places, 212 transitions, 892 flow [2022-11-02 20:40:06,255 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=892, PETRI_PLACES=240, PETRI_TRANSITIONS=212} [2022-11-02 20:40:06,256 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 83 predicate places. [2022-11-02 20:40:06,256 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 212 transitions, 892 flow [2022-11-02 20:40:06,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 147.5) internal successors, (1770), 12 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:06,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:40:06,258 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:06,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:40:06,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:06,473 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:40:06,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:06,473 INFO L85 PathProgramCache]: Analyzing trace with hash 228903536, now seen corresponding path program 1 times [2022-11-02 20:40:06,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:06,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600446803] [2022-11-02 20:40:06,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:06,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:06,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:40:08,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:08,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600446803] [2022-11-02 20:40:08,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600446803] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:40:08,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509420636] [2022-11-02 20:40:08,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:08,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:08,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:08,203 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:40:08,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:40:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:08,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-02 20:40:08,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:10,145 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 19 treesize of output 15 [2022-11-02 20:40:11,522 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 41 treesize of output 21 [2022-11-02 20:40:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:11,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:40:12,650 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 54 treesize of output 46 [2022-11-02 20:40:13,366 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:40:13,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509420636] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:40:13,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:40:13,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [23, 26] total 66 [2022-11-02 20:40:13,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497167206] [2022-11-02 20:40:13,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:13,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 20:40:13,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:13,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 20:40:13,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=4050, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:40:13,372 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 172 [2022-11-02 20:40:13,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 212 transitions, 892 flow. Second operand has 22 states, 22 states have (on average 100.45454545454545) internal successors, (2210), 22 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:13,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:40:13,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 172 [2022-11-02 20:40:13,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:40:22,972 INFO L130 PetriNetUnfolder]: 2268/9129 cut-off events. [2022-11-02 20:40:22,973 INFO L131 PetriNetUnfolder]: For 4300/4300 co-relation queries the response was YES. [2022-11-02 20:40:23,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19922 conditions, 9129 events. 2268/9129 cut-off events. For 4300/4300 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 80378 event pairs, 341 based on Foata normal form. 12/8952 useless extension candidates. Maximal degree in co-relation 13458. Up to 1194 conditions per place. [2022-11-02 20:40:23,059 INFO L137 encePairwiseOnDemand]: 137/172 looper letters, 268 selfloop transitions, 174 changer transitions 3/531 dead transitions. [2022-11-02 20:40:23,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 531 transitions, 3109 flow [2022-11-02 20:40:23,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-02 20:40:23,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-11-02 20:40:23,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 6726 transitions. [2022-11-02 20:40:23,073 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5924947145877378 [2022-11-02 20:40:23,074 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 6726 transitions. [2022-11-02 20:40:23,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 6726 transitions. [2022-11-02 20:40:23,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:40:23,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 6726 transitions. [2022-11-02 20:40:23,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 101.9090909090909) internal successors, (6726), 66 states have internal predecessors, (6726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:23,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 172.0) internal successors, (11524), 67 states have internal predecessors, (11524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:23,214 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 172.0) internal successors, (11524), 67 states have internal predecessors, (11524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:23,214 INFO L175 Difference]: Start difference. First operand has 240 places, 212 transitions, 892 flow. Second operand 66 states and 6726 transitions. [2022-11-02 20:40:23,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 531 transitions, 3109 flow [2022-11-02 20:40:23,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 531 transitions, 2944 flow, removed 32 selfloop flow, removed 6 redundant places. [2022-11-02 20:40:23,267 INFO L231 Difference]: Finished difference. Result has 318 places, 351 transitions, 2045 flow [2022-11-02 20:40:23,268 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=2045, PETRI_PLACES=318, PETRI_TRANSITIONS=351} [2022-11-02 20:40:23,271 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 161 predicate places. [2022-11-02 20:40:23,273 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 351 transitions, 2045 flow [2022-11-02 20:40:23,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 100.45454545454545) internal successors, (2210), 22 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:23,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:40:23,275 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:23,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:40:23,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-02 20:40:23,499 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:40:23,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:23,499 INFO L85 PathProgramCache]: Analyzing trace with hash -243293540, now seen corresponding path program 2 times [2022-11-02 20:40:23,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:23,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682810304] [2022-11-02 20:40:23,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:23,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:40:25,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:25,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682810304] [2022-11-02 20:40:25,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682810304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:40:25,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279282070] [2022-11-02 20:40:25,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:40:25,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:25,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:25,693 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:40:25,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:40:25,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:40:25,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:40:25,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-02 20:40:25,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:25,959 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:40:25,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-02 20:40:25,975 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:40:25,975 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 20:40:27,040 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 19 treesize of output 15 [2022-11-02 20:40:27,474 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 60 treesize of output 56 [2022-11-02 20:40:28,453 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 61 treesize of output 21 [2022-11-02 20:40:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:40:28,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:40:29,481 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_265 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_265) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-11-02 20:40:29,513 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_265 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_265) |c_~#arr~0.base|) (+ (* 4 |c_t1Thread1of1ForFork0_inc_top_#t~post31#1|) |c_~#arr~0.offset|)) 4294967296)))) is different from false [2022-11-02 20:40:29,521 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_265 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_265) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-11-02 20:40:29,557 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:40:29,558 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 29 treesize of output 30 [2022-11-02 20:40:29,568 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:40:29,569 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 49 treesize of output 52 [2022-11-02 20:40:29,574 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 28 treesize of output 22 [2022-11-02 20:40:30,869 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 20:40:30,870 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 13 treesize of output 12 [2022-11-02 20:40:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 5 not checked. [2022-11-02 20:40:30,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279282070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:40:30,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:40:30,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 74 [2022-11-02 20:40:30,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298640645] [2022-11-02 20:40:30,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:40:30,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-02 20:40:30,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:30,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-02 20:40:30,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=4694, Unknown=3, NotChecked=420, Total=5402 [2022-11-02 20:40:30,885 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 172 [2022-11-02 20:40:30,891 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 351 transitions, 2045 flow. Second operand has 74 states, 74 states have (on average 86.22972972972973) internal successors, (6381), 74 states have internal predecessors, (6381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:30,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:40:30,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 172 [2022-11-02 20:40:30,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:41:05,572 INFO L130 PetriNetUnfolder]: 3287/13198 cut-off events. [2022-11-02 20:41:05,573 INFO L131 PetriNetUnfolder]: For 10070/10070 co-relation queries the response was YES. [2022-11-02 20:41:05,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32775 conditions, 13198 events. 3287/13198 cut-off events. For 10070/10070 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 127703 event pairs, 489 based on Foata normal form. 8/12943 useless extension candidates. Maximal degree in co-relation 24537. Up to 1713 conditions per place. [2022-11-02 20:41:05,821 INFO L137 encePairwiseOnDemand]: 133/172 looper letters, 454 selfloop transitions, 376 changer transitions 4/910 dead transitions. [2022-11-02 20:41:05,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 910 transitions, 6664 flow [2022-11-02 20:41:05,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-02 20:41:05,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-11-02 20:41:05,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 8027 transitions. [2022-11-02 20:41:05,836 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5128418093534373 [2022-11-02 20:41:05,836 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 8027 transitions. [2022-11-02 20:41:05,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 8027 transitions. [2022-11-02 20:41:05,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:41:05,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 8027 transitions. [2022-11-02 20:41:05,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 88.20879120879121) internal successors, (8027), 91 states have internal predecessors, (8027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:05,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 172.0) internal successors, (15824), 92 states have internal predecessors, (15824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:05,886 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 172.0) internal successors, (15824), 92 states have internal predecessors, (15824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:05,886 INFO L175 Difference]: Start difference. First operand has 318 places, 351 transitions, 2045 flow. Second operand 91 states and 8027 transitions. [2022-11-02 20:41:05,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 910 transitions, 6664 flow [2022-11-02 20:41:05,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 910 transitions, 6445 flow, removed 83 selfloop flow, removed 9 redundant places. [2022-11-02 20:41:05,997 INFO L231 Difference]: Finished difference. Result has 437 places, 599 transitions, 5019 flow [2022-11-02 20:41:05,998 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=1951, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=5019, PETRI_PLACES=437, PETRI_TRANSITIONS=599} [2022-11-02 20:41:05,999 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 280 predicate places. [2022-11-02 20:41:05,999 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 599 transitions, 5019 flow [2022-11-02 20:41:06,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 86.22972972972973) internal successors, (6381), 74 states have internal predecessors, (6381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:06,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:41:06,001 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:06,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:06,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-02 20:41:06,217 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:41:06,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:06,217 INFO L85 PathProgramCache]: Analyzing trace with hash 397251088, now seen corresponding path program 3 times [2022-11-02 20:41:06,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:06,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680810190] [2022-11-02 20:41:06,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:06,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:09,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:09,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680810190] [2022-11-02 20:41:09,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680810190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:09,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118932491] [2022-11-02 20:41:09,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:41:09,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:09,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:09,153 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:09,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:41:09,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-02 20:41:09,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:41:09,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-02 20:41:09,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:09,440 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:41:09,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-02 20:41:09,456 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:41:09,457 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 20:41:10,512 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 19 treesize of output 15 [2022-11-02 20:41:10,797 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 56 treesize of output 52 [2022-11-02 20:41:11,850 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 61 treesize of output 21 [2022-11-02 20:41:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:41:12,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:13,073 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_319 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_319) |c_~#arr~0.base|) (+ (* 4 |c_t1Thread1of1ForFork0_inc_top_#t~post31#1|) |c_~#arr~0.offset|)) 4294967296)))) is different from false [2022-11-02 20:41:13,098 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_319 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_319) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296)))) is different from false [2022-11-02 20:41:13,123 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:41:13,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-02 20:41:13,135 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:41:13,135 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 49 treesize of output 52 [2022-11-02 20:41:13,141 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 28 treesize of output 22 [2022-11-02 20:41:14,309 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 20:41:14,309 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 13 treesize of output 12 [2022-11-02 20:41:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 4 not checked. [2022-11-02 20:41:14,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118932491] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:14,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:14,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 75 [2022-11-02 20:41:14,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341119187] [2022-11-02 20:41:14,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:14,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-02 20:41:14,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:14,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-02 20:41:14,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=5020, Unknown=2, NotChecked=286, Total=5550 [2022-11-02 20:41:14,322 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 172 [2022-11-02 20:41:14,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 599 transitions, 5019 flow. Second operand has 75 states, 75 states have (on average 87.21333333333334) internal successors, (6541), 75 states have internal predecessors, (6541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:14,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:41:14,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 172 [2022-11-02 20:41:14,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:42:58,515 INFO L130 PetriNetUnfolder]: 7740/32611 cut-off events. [2022-11-02 20:42:58,515 INFO L131 PetriNetUnfolder]: For 88215/88267 co-relation queries the response was YES. [2022-11-02 20:42:59,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107302 conditions, 32611 events. 7740/32611 cut-off events. For 88215/88267 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 380399 event pairs, 1052 based on Foata normal form. 61/32012 useless extension candidates. Maximal degree in co-relation 101186. Up to 4510 conditions per place. [2022-11-02 20:42:59,204 INFO L137 encePairwiseOnDemand]: 129/172 looper letters, 1315 selfloop transitions, 1067 changer transitions 40/2498 dead transitions. [2022-11-02 20:42:59,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 697 places, 2498 transitions, 25654 flow [2022-11-02 20:42:59,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2022-11-02 20:42:59,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2022-11-02 20:42:59,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 23177 transitions. [2022-11-02 20:42:59,248 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5162835249042146 [2022-11-02 20:42:59,248 INFO L72 ComplementDD]: Start complementDD. Operand 261 states and 23177 transitions. [2022-11-02 20:42:59,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 261 states and 23177 transitions. [2022-11-02 20:42:59,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:42:59,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 261 states and 23177 transitions. [2022-11-02 20:42:59,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 262 states, 261 states have (on average 88.80076628352491) internal successors, (23177), 261 states have internal predecessors, (23177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:42:59,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 262 states, 262 states have (on average 172.0) internal successors, (45064), 262 states have internal predecessors, (45064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:42:59,385 INFO L81 ComplementDD]: Finished complementDD. Result has 262 states, 262 states have (on average 172.0) internal successors, (45064), 262 states have internal predecessors, (45064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:42:59,385 INFO L175 Difference]: Start difference. First operand has 437 places, 599 transitions, 5019 flow. Second operand 261 states and 23177 transitions. [2022-11-02 20:42:59,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 697 places, 2498 transitions, 25654 flow [2022-11-02 20:43:00,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 676 places, 2498 transitions, 25195 flow, removed 161 selfloop flow, removed 21 redundant places. [2022-11-02 20:43:00,068 INFO L231 Difference]: Finished difference. Result has 789 places, 1580 transitions, 18344 flow [2022-11-02 20:43:00,070 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=4856, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=261, PETRI_FLOW=18344, PETRI_PLACES=789, PETRI_TRANSITIONS=1580} [2022-11-02 20:43:00,070 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 632 predicate places. [2022-11-02 20:43:00,071 INFO L495 AbstractCegarLoop]: Abstraction has has 789 places, 1580 transitions, 18344 flow [2022-11-02 20:43:00,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 87.21333333333334) internal successors, (6541), 75 states have internal predecessors, (6541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:00,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:00,073 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-02 20:43:00,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:00,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:00,276 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:43:00,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:00,277 INFO L85 PathProgramCache]: Analyzing trace with hash -453573317, now seen corresponding path program 2 times [2022-11-02 20:43:00,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:00,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785882507] [2022-11-02 20:43:00,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:00,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:00,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:00,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785882507] [2022-11-02 20:43:00,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785882507] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:00,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359526378] [2022-11-02 20:43:00,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:43:00,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:00,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:00,553 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:00,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54961422-566b-47d9-aa17-edea955bb14d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:43:00,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:43:00,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:43:00,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:43:00,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:00,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:01,316 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:01,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359526378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:01,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:01,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:43:01,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487423309] [2022-11-02 20:43:01,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:01,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:43:01,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:01,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:43:01,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:43:01,320 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 172 [2022-11-02 20:43:01,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 789 places, 1580 transitions, 18344 flow. Second operand has 18 states, 18 states have (on average 148.72222222222223) internal successors, (2677), 18 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:01,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:01,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 172 [2022-11-02 20:43:01,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:25,549 INFO L130 PetriNetUnfolder]: 2951/32897 cut-off events. [2022-11-02 20:43:25,549 INFO L131 PetriNetUnfolder]: For 191819/191939 co-relation queries the response was YES. [2022-11-02 20:43:26,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112590 conditions, 32897 events. 2951/32897 cut-off events. For 191819/191939 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 383380 event pairs, 594 based on Foata normal form. 186/32195 useless extension candidates. Maximal degree in co-relation 111629. Up to 2169 conditions per place. [2022-11-02 20:43:27,027 INFO L137 encePairwiseOnDemand]: 165/172 looper letters, 623 selfloop transitions, 630 changer transitions 1/2189 dead transitions. [2022-11-02 20:43:27,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 804 places, 2189 transitions, 29124 flow [2022-11-02 20:43:27,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 20:43:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-02 20:43:27,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3631 transitions. [2022-11-02 20:43:27,034 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8796027131782945 [2022-11-02 20:43:27,034 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3631 transitions. [2022-11-02 20:43:27,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3631 transitions. [2022-11-02 20:43:27,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:27,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3631 transitions. [2022-11-02 20:43:27,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 151.29166666666666) internal successors, (3631), 24 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:27,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 172.0) internal successors, (4300), 25 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:27,051 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 172.0) internal successors, (4300), 25 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:27,051 INFO L175 Difference]: Start difference. First operand has 789 places, 1580 transitions, 18344 flow. Second operand 24 states and 3631 transitions. [2022-11-02 20:43:27,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 804 places, 2189 transitions, 29124 flow