./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/mult-dist.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/mult-dist.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c22a326532494b0b5126a81d8882f3e958ed0a5a46e6da0f77df1a4da18ba846 --- 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-38b53e6 [2022-11-25 15:41:56,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:41:56,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:41:56,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:41:56,982 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:41:56,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:41:56,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:41:56,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:41:56,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:41:56,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:41:56,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:41:56,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:41:56,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:41:56,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:41:56,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:41:56,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:41:56,999 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:41:57,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:41:57,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:41:57,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:41:57,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:41:57,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:41:57,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:41:57,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:41:57,032 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:41:57,036 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:41:57,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:41:57,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:41:57,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:41:57,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:41:57,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:41:57,043 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:41:57,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:41:57,047 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:41:57,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:41:57,049 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:41:57,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:41:57,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:41:57,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:41:57,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:41:57,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:41:57,055 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 15:41:57,107 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:41:57,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:41:57,110 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:41:57,110 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:41:57,112 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:41:57,112 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:41:57,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:41:57,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:41:57,114 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:41:57,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:41:57,115 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:41:57,116 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 15:41:57,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:41:57,116 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:41:57,116 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:41:57,117 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 15:41:57,117 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 15:41:57,117 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 15:41:57,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:41:57,118 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 15:41:57,118 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:41:57,118 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:41:57,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:41:57,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:41:57,119 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:41:57,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:41:57,120 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:41:57,120 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:41:57,121 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:41:57,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:41:57,121 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:41:57,122 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:41:57,122 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:41:57,122 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c22a326532494b0b5126a81d8882f3e958ed0a5a46e6da0f77df1a4da18ba846 [2022-11-25 15:41:57,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:41:57,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:41:57,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:41:57,519 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:41:57,520 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:41:57,521 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/mult-dist.wvr.c [2022-11-25 15:42:01,122 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:42:01,358 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:42:01,359 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/sv-benchmarks/c/weaver/mult-dist.wvr.c [2022-11-25 15:42:01,373 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/data/b734013bd/c422bc5ce31845cead5d3cc33c6e5f92/FLAG47d097544 [2022-11-25 15:42:01,392 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/data/b734013bd/c422bc5ce31845cead5d3cc33c6e5f92 [2022-11-25 15:42:01,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:42:01,398 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:42:01,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:42:01,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:42:01,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:42:01,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:42:01" (1/1) ... [2022-11-25 15:42:01,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10e613d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:01, skipping insertion in model container [2022-11-25 15:42:01,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:42:01" (1/1) ... [2022-11-25 15:42:01,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:42:01,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:42:01,682 WARN L237 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_4830e00b-cc6f-4c19-a39a-eabae00c9d17/sv-benchmarks/c/weaver/mult-dist.wvr.c[2116,2129] [2022-11-25 15:42:01,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:42:01,701 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:42:01,729 WARN L237 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_4830e00b-cc6f-4c19-a39a-eabae00c9d17/sv-benchmarks/c/weaver/mult-dist.wvr.c[2116,2129] [2022-11-25 15:42:01,730 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:42:01,751 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:42:01,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:01 WrapperNode [2022-11-25 15:42:01,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:42:01,753 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:42:01,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:42:01,754 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:42:01,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:01" (1/1) ... [2022-11-25 15:42:01,788 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:01" (1/1) ... [2022-11-25 15:42:01,806 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-11-25 15:42:01,807 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:42:01,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:42:01,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:42:01,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:42:01,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:01" (1/1) ... [2022-11-25 15:42:01,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:01" (1/1) ... [2022-11-25 15:42:01,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:01" (1/1) ... [2022-11-25 15:42:01,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:01" (1/1) ... [2022-11-25 15:42:01,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:01" (1/1) ... [2022-11-25 15:42:01,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:01" (1/1) ... [2022-11-25 15:42:01,855 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:01" (1/1) ... [2022-11-25 15:42:01,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:01" (1/1) ... [2022-11-25 15:42:01,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:42:01,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:42:01,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:42:01,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:42:01,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:01" (1/1) ... [2022-11-25 15:42:01,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:42:01,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:42:01,917 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:42:01,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:42:01,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:42:01,962 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 15:42:01,963 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 15:42:01,963 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 15:42:01,963 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 15:42:01,963 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 15:42:01,963 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 15:42:01,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:42:01,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:42:01,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:42:01,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:42:01,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:42:01,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:42:01,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:42:01,966 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 15:42:02,091 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:42:02,094 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:42:02,395 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:42:02,405 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:42:02,418 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 15:42:02,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:42:02 BoogieIcfgContainer [2022-11-25 15:42:02,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:42:02,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:42:02,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:42:02,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:42:02,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:42:01" (1/3) ... [2022-11-25 15:42:02,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355419e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:42:02, skipping insertion in model container [2022-11-25 15:42:02,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:42:01" (2/3) ... [2022-11-25 15:42:02,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355419e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:42:02, skipping insertion in model container [2022-11-25 15:42:02,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:42:02" (3/3) ... [2022-11-25 15:42:02,443 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2022-11-25 15:42:02,493 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:42:02,506 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-11-25 15:42:02,507 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:42:02,731 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 15:42:02,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 123 transitions, 270 flow [2022-11-25 15:42:02,922 INFO L130 PetriNetUnfolder]: 7/120 cut-off events. [2022-11-25 15:42:02,922 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 15:42:02,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 120 events. 7/120 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 112 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 73. Up to 2 conditions per place. [2022-11-25 15:42:02,931 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 123 transitions, 270 flow [2022-11-25 15:42:02,940 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 115 transitions, 248 flow [2022-11-25 15:42:02,945 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:42:02,980 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 115 transitions, 248 flow [2022-11-25 15:42:02,995 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 115 transitions, 248 flow [2022-11-25 15:42:02,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 115 transitions, 248 flow [2022-11-25 15:42:03,053 INFO L130 PetriNetUnfolder]: 7/115 cut-off events. [2022-11-25 15:42:03,053 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 15:42:03,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 115 events. 7/115 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 111 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 73. Up to 2 conditions per place. [2022-11-25 15:42:03,060 INFO L119 LiptonReduction]: Number of co-enabled transitions 1680 [2022-11-25 15:42:09,074 INFO L134 LiptonReduction]: Checked pairs total: 1766 [2022-11-25 15:42:09,074 INFO L136 LiptonReduction]: Total number of compositions: 112 [2022-11-25 15:42:09,096 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:42:09,105 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@499b3317, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:42:09,105 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2022-11-25 15:42:09,107 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 15:42:09,108 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:42:09,108 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:42:09,109 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 15:42:09,110 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:42:09,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:42:09,117 INFO L85 PathProgramCache]: Analyzing trace with hash 453, now seen corresponding path program 1 times [2022-11-25 15:42:09,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:42:09,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418203746] [2022-11-25 15:42:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:42:09,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:42:09,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:09,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:42:09,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418203746] [2022-11-25 15:42:09,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418203746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:42:09,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:42:09,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 15:42:09,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330212451] [2022-11-25 15:42:09,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:42:09,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 15:42:09,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:42:09,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 15:42:09,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 15:42:09,353 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 235 [2022-11-25 15:42:09,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 88 flow. Second operand has 2 states, 2 states have (on average 112.5) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:09,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:42:09,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 235 [2022-11-25 15:42:09,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:42:09,685 INFO L130 PetriNetUnfolder]: 578/785 cut-off events. [2022-11-25 15:42:09,685 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-25 15:42:09,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1605 conditions, 785 events. 578/785 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2770 event pairs, 263 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 1257. Up to 777 conditions per place. [2022-11-25 15:42:09,701 INFO L137 encePairwiseOnDemand]: 232/235 looper letters, 29 selfloop transitions, 0 changer transitions 0/32 dead transitions. [2022-11-25 15:42:09,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 32 transitions, 140 flow [2022-11-25 15:42:09,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 15:42:09,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 15:42:09,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 256 transitions. [2022-11-25 15:42:09,731 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5446808510638298 [2022-11-25 15:42:09,732 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 256 transitions. [2022-11-25 15:42:09,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 256 transitions. [2022-11-25 15:42:09,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:42:09,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 256 transitions. [2022-11-25 15:42:09,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 128.0) internal successors, (256), 2 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:09,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:09,753 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:09,756 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 88 flow. Second operand 2 states and 256 transitions. [2022-11-25 15:42:09,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 32 transitions, 140 flow [2022-11-25 15:42:09,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 128 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 15:42:09,764 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 70 flow [2022-11-25 15:42:09,767 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=70, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2022-11-25 15:42:09,775 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -8 predicate places. [2022-11-25 15:42:09,776 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 70 flow [2022-11-25 15:42:09,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 112.5) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:09,777 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:42:09,777 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 15:42:09,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:42:09,780 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:42:09,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:42:09,788 INFO L85 PathProgramCache]: Analyzing trace with hash 444253, now seen corresponding path program 1 times [2022-11-25 15:42:09,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:42:09,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225719341] [2022-11-25 15:42:09,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:42:09,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:42:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:10,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:10,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:42:10,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225719341] [2022-11-25 15:42:10,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225719341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:42:10,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:42:10,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:42:10,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716014480] [2022-11-25 15:42:10,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:42:10,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:42:10,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:42:10,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:42:10,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:42:10,301 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 235 [2022-11-25 15:42:10,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:10,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:42:10,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 235 [2022-11-25 15:42:10,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:42:10,453 INFO L130 PetriNetUnfolder]: 551/746 cut-off events. [2022-11-25 15:42:10,454 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 15:42:10,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1499 conditions, 746 events. 551/746 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2586 event pairs, 250 based on Foata normal form. 0/368 useless extension candidates. Maximal degree in co-relation 1496. Up to 737 conditions per place. [2022-11-25 15:42:10,461 INFO L137 encePairwiseOnDemand]: 232/235 looper letters, 26 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2022-11-25 15:42:10,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 30 transitions, 120 flow [2022-11-25 15:42:10,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:42:10,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:42:10,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 350 transitions. [2022-11-25 15:42:10,465 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49645390070921985 [2022-11-25 15:42:10,465 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 350 transitions. [2022-11-25 15:42:10,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 350 transitions. [2022-11-25 15:42:10,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:42:10,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 350 transitions. [2022-11-25 15:42:10,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:10,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:10,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:10,472 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 70 flow. Second operand 3 states and 350 transitions. [2022-11-25 15:42:10,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 30 transitions, 120 flow [2022-11-25 15:42:10,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 120 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 15:42:10,474 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 68 flow [2022-11-25 15:42:10,475 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2022-11-25 15:42:10,476 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -8 predicate places. [2022-11-25 15:42:10,476 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 68 flow [2022-11-25 15:42:10,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:10,477 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:42:10,477 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 15:42:10,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:42:10,478 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:42:10,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:42:10,479 INFO L85 PathProgramCache]: Analyzing trace with hash 444252, now seen corresponding path program 1 times [2022-11-25 15:42:10,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:42:10,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498746552] [2022-11-25 15:42:10,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:42:10,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:42:10,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:10,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:42:10,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498746552] [2022-11-25 15:42:10,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498746552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:42:10,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:42:10,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:42:10,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99406470] [2022-11-25 15:42:10,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:42:10,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:42:10,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:42:10,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:42:10,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:42:10,822 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 235 [2022-11-25 15:42:10,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:10,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:42:10,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 235 [2022-11-25 15:42:10,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:42:10,978 INFO L130 PetriNetUnfolder]: 524/707 cut-off events. [2022-11-25 15:42:10,979 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 15:42:10,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1423 conditions, 707 events. 524/707 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2433 event pairs, 237 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 1419. Up to 698 conditions per place. [2022-11-25 15:42:10,986 INFO L137 encePairwiseOnDemand]: 232/235 looper letters, 24 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2022-11-25 15:42:10,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 114 flow [2022-11-25 15:42:10,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:42:10,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:42:10,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 333 transitions. [2022-11-25 15:42:10,989 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4723404255319149 [2022-11-25 15:42:10,989 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 333 transitions. [2022-11-25 15:42:10,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 333 transitions. [2022-11-25 15:42:10,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:42:10,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 333 transitions. [2022-11-25 15:42:10,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:10,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:10,995 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:10,995 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 68 flow. Second operand 3 states and 333 transitions. [2022-11-25 15:42:10,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 114 flow [2022-11-25 15:42:10,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:42:10,997 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 65 flow [2022-11-25 15:42:10,998 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2022-11-25 15:42:10,999 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -9 predicate places. [2022-11-25 15:42:10,999 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 65 flow [2022-11-25 15:42:11,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:11,000 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:42:11,000 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 15:42:11,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:42:11,001 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:42:11,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:42:11,002 INFO L85 PathProgramCache]: Analyzing trace with hash 426935035, now seen corresponding path program 1 times [2022-11-25 15:42:11,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:42:11,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345576754] [2022-11-25 15:42:11,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:42:11,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:42:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:11,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:11,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:42:11,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345576754] [2022-11-25 15:42:11,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345576754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:42:11,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:42:11,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:42:11,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144216946] [2022-11-25 15:42:11,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:42:11,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:42:11,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:42:11,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:42:11,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:42:11,126 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 235 [2022-11-25 15:42:11,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:11,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:42:11,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 235 [2022-11-25 15:42:11,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:42:11,269 INFO L130 PetriNetUnfolder]: 498/669 cut-off events. [2022-11-25 15:42:11,269 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 15:42:11,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1348 conditions, 669 events. 498/669 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2245 event pairs, 225 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 1344. Up to 660 conditions per place. [2022-11-25 15:42:11,276 INFO L137 encePairwiseOnDemand]: 232/235 looper letters, 22 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2022-11-25 15:42:11,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 26 transitions, 107 flow [2022-11-25 15:42:11,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:42:11,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:42:11,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 331 transitions. [2022-11-25 15:42:11,284 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4695035460992908 [2022-11-25 15:42:11,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 331 transitions. [2022-11-25 15:42:11,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 331 transitions. [2022-11-25 15:42:11,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:42:11,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 331 transitions. [2022-11-25 15:42:11,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:11,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:11,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:11,296 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 65 flow. Second operand 3 states and 331 transitions. [2022-11-25 15:42:11,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 26 transitions, 107 flow [2022-11-25 15:42:11,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 106 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:42:11,299 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 62 flow [2022-11-25 15:42:11,299 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2022-11-25 15:42:11,301 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -10 predicate places. [2022-11-25 15:42:11,301 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 62 flow [2022-11-25 15:42:11,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:11,302 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:42:11,302 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 15:42:11,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 15:42:11,304 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:42:11,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:42:11,305 INFO L85 PathProgramCache]: Analyzing trace with hash 426935036, now seen corresponding path program 1 times [2022-11-25 15:42:11,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:42:11,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248589165] [2022-11-25 15:42:11,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:42:11,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:42:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:11,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:11,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:42:11,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248589165] [2022-11-25 15:42:11,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248589165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:42:11,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:42:11,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:42:11,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822084020] [2022-11-25 15:42:11,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:42:11,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:42:11,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:42:11,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:42:11,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:42:11,512 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 235 [2022-11-25 15:42:11,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:11,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:42:11,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 235 [2022-11-25 15:42:11,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:42:11,617 INFO L130 PetriNetUnfolder]: 472/631 cut-off events. [2022-11-25 15:42:11,617 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 15:42:11,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1273 conditions, 631 events. 472/631 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2074 event pairs, 213 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 1269. Up to 622 conditions per place. [2022-11-25 15:42:11,625 INFO L137 encePairwiseOnDemand]: 232/235 looper letters, 20 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2022-11-25 15:42:11,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 24 transitions, 100 flow [2022-11-25 15:42:11,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:42:11,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:42:11,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2022-11-25 15:42:11,627 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4879432624113475 [2022-11-25 15:42:11,627 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 344 transitions. [2022-11-25 15:42:11,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 344 transitions. [2022-11-25 15:42:11,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:42:11,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 344 transitions. [2022-11-25 15:42:11,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:11,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:11,632 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:11,632 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 62 flow. Second operand 3 states and 344 transitions. [2022-11-25 15:42:11,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 24 transitions, 100 flow [2022-11-25 15:42:11,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:42:11,635 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 59 flow [2022-11-25 15:42:11,635 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2022-11-25 15:42:11,639 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -11 predicate places. [2022-11-25 15:42:11,639 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 59 flow [2022-11-25 15:42:11,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:11,641 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:42:11,641 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:42:11,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 15:42:11,641 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:42:11,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:42:11,645 INFO L85 PathProgramCache]: Analyzing trace with hash -2032282824, now seen corresponding path program 1 times [2022-11-25 15:42:11,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:42:11,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927287583] [2022-11-25 15:42:11,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:42:11,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:42:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:11,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:42:11,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927287583] [2022-11-25 15:42:11,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927287583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:42:11,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:42:11,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:42:11,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405109217] [2022-11-25 15:42:11,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:42:11,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:42:11,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:42:11,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:42:11,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:42:12,000 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 235 [2022-11-25 15:42:12,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 59 flow. Second operand has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:12,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:42:12,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 235 [2022-11-25 15:42:12,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:42:12,101 INFO L130 PetriNetUnfolder]: 370/502 cut-off events. [2022-11-25 15:42:12,101 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 15:42:12,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 502 events. 370/502 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1571 event pairs, 165 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 1012. Up to 493 conditions per place. [2022-11-25 15:42:12,105 INFO L137 encePairwiseOnDemand]: 233/235 looper letters, 19 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2022-11-25 15:42:12,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 23 transitions, 97 flow [2022-11-25 15:42:12,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:42:12,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:42:12,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 336 transitions. [2022-11-25 15:42:12,108 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4765957446808511 [2022-11-25 15:42:12,108 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 336 transitions. [2022-11-25 15:42:12,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 336 transitions. [2022-11-25 15:42:12,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:42:12,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 336 transitions. [2022-11-25 15:42:12,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:12,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:12,114 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:12,114 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 59 flow. Second operand 3 states and 336 transitions. [2022-11-25 15:42:12,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 23 transitions, 97 flow [2022-11-25 15:42:12,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 23 transitions, 96 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:42:12,115 INFO L231 Difference]: Finished difference. Result has 31 places, 23 transitions, 58 flow [2022-11-25 15:42:12,115 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=31, PETRI_TRANSITIONS=23} [2022-11-25 15:42:12,118 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -11 predicate places. [2022-11-25 15:42:12,119 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 23 transitions, 58 flow [2022-11-25 15:42:12,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:12,119 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:42:12,120 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:42:12,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 15:42:12,120 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:42:12,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:42:12,125 INFO L85 PathProgramCache]: Analyzing trace with hash -2032282823, now seen corresponding path program 1 times [2022-11-25 15:42:12,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:42:12,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233676391] [2022-11-25 15:42:12,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:42:12,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:42:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:12,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:42:12,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233676391] [2022-11-25 15:42:12,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233676391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:42:12,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:42:12,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:42:12,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539302572] [2022-11-25 15:42:12,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:42:12,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:42:12,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:42:12,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:42:12,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:42:12,447 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 235 [2022-11-25 15:42:12,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 23 transitions, 58 flow. Second operand has 5 states, 5 states have (on average 95.4) internal successors, (477), 5 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:12,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:42:12,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 235 [2022-11-25 15:42:12,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:42:12,525 INFO L130 PetriNetUnfolder]: 268/373 cut-off events. [2022-11-25 15:42:12,525 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 15:42:12,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 373 events. 268/373 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1110 event pairs, 117 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 755. Up to 364 conditions per place. [2022-11-25 15:42:12,528 INFO L137 encePairwiseOnDemand]: 233/235 looper letters, 18 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2022-11-25 15:42:12,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 22 transitions, 94 flow [2022-11-25 15:42:12,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:42:12,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:42:12,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2022-11-25 15:42:12,531 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42836879432624114 [2022-11-25 15:42:12,531 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 302 transitions. [2022-11-25 15:42:12,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 302 transitions. [2022-11-25 15:42:12,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:42:12,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 302 transitions. [2022-11-25 15:42:12,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:12,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:12,536 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:12,536 INFO L175 Difference]: Start difference. First operand has 31 places, 23 transitions, 58 flow. Second operand 3 states and 302 transitions. [2022-11-25 15:42:12,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 22 transitions, 94 flow [2022-11-25 15:42:12,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 22 transitions, 93 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:42:12,538 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 57 flow [2022-11-25 15:42:12,538 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2022-11-25 15:42:12,539 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -11 predicate places. [2022-11-25 15:42:12,539 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 57 flow [2022-11-25 15:42:12,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.4) internal successors, (477), 5 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:12,540 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:42:12,540 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:42:12,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 15:42:12,540 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:42:12,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:42:12,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1225958123, now seen corresponding path program 1 times [2022-11-25 15:42:12,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:42:12,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189351323] [2022-11-25 15:42:12,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:42:12,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:42:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:12,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:42:12,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189351323] [2022-11-25 15:42:12,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189351323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:42:12,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:42:12,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:42:12,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120403650] [2022-11-25 15:42:12,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:42:12,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:42:12,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:42:12,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:42:12,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:42:12,943 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 235 [2022-11-25 15:42:12,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:12,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:42:12,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 235 [2022-11-25 15:42:12,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:42:13,059 INFO L130 PetriNetUnfolder]: 359/506 cut-off events. [2022-11-25 15:42:13,059 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 15:42:13,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1032 conditions, 506 events. 359/506 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1611 event pairs, 39 based on Foata normal form. 1/308 useless extension candidates. Maximal degree in co-relation 1028. Up to 421 conditions per place. [2022-11-25 15:42:13,063 INFO L137 encePairwiseOnDemand]: 230/235 looper letters, 30 selfloop transitions, 4 changer transitions 1/38 dead transitions. [2022-11-25 15:42:13,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 38 transitions, 164 flow [2022-11-25 15:42:13,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:42:13,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:42:13,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2022-11-25 15:42:13,066 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5148936170212766 [2022-11-25 15:42:13,066 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2022-11-25 15:42:13,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2022-11-25 15:42:13,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:42:13,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2022-11-25 15:42:13,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:13,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:13,070 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:13,071 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 57 flow. Second operand 3 states and 363 transitions. [2022-11-25 15:42:13,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 38 transitions, 164 flow [2022-11-25 15:42:13,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 38 transitions, 163 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:42:13,072 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 82 flow [2022-11-25 15:42:13,073 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2022-11-25 15:42:13,073 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -9 predicate places. [2022-11-25 15:42:13,073 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 82 flow [2022-11-25 15:42:13,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:13,074 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:42:13,074 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:42:13,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 15:42:13,075 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:42:13,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:42:13,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1724572522, now seen corresponding path program 1 times [2022-11-25 15:42:13,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:42:13,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747693063] [2022-11-25 15:42:13,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:42:13,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:42:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:13,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:42:13,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747693063] [2022-11-25 15:42:13,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747693063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:42:13,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:42:13,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 15:42:13,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843530877] [2022-11-25 15:42:13,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:42:13,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:42:13,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:42:13,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:42:13,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:42:13,628 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 235 [2022-11-25 15:42:13,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 82 flow. Second operand has 7 states, 7 states have (on average 100.85714285714286) internal successors, (706), 7 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:13,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:42:13,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 235 [2022-11-25 15:42:13,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:42:14,150 INFO L130 PetriNetUnfolder]: 596/906 cut-off events. [2022-11-25 15:42:14,150 INFO L131 PetriNetUnfolder]: For 179/179 co-relation queries the response was YES. [2022-11-25 15:42:14,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2194 conditions, 906 events. 596/906 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3344 event pairs, 166 based on Foata normal form. 6/912 useless extension candidates. Maximal degree in co-relation 2189. Up to 420 conditions per place. [2022-11-25 15:42:14,159 INFO L137 encePairwiseOnDemand]: 227/235 looper letters, 69 selfloop transitions, 8 changer transitions 8/85 dead transitions. [2022-11-25 15:42:14,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 85 transitions, 422 flow [2022-11-25 15:42:14,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:42:14,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:42:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 764 transitions. [2022-11-25 15:42:14,164 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4644376899696049 [2022-11-25 15:42:14,165 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 764 transitions. [2022-11-25 15:42:14,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 764 transitions. [2022-11-25 15:42:14,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:42:14,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 764 transitions. [2022-11-25 15:42:14,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 109.14285714285714) internal successors, (764), 7 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:14,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:14,175 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:14,176 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 82 flow. Second operand 7 states and 764 transitions. [2022-11-25 15:42:14,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 85 transitions, 422 flow [2022-11-25 15:42:14,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 85 transitions, 412 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:42:14,180 INFO L231 Difference]: Finished difference. Result has 43 places, 31 transitions, 145 flow [2022-11-25 15:42:14,181 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=145, PETRI_PLACES=43, PETRI_TRANSITIONS=31} [2022-11-25 15:42:14,181 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2022-11-25 15:42:14,182 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 145 flow [2022-11-25 15:42:14,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 100.85714285714286) internal successors, (706), 7 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:14,183 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:42:14,183 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:42:14,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 15:42:14,184 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:42:14,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:42:14,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1074779342, now seen corresponding path program 2 times [2022-11-25 15:42:14,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:42:14,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93386307] [2022-11-25 15:42:14,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:42:14,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:42:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:14,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:42:14,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93386307] [2022-11-25 15:42:14,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93386307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:42:14,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091350438] [2022-11-25 15:42:14,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:42:14,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:42:14,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:42:14,507 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:42:14,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:42:14,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:42:14,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:42:14,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:42:14,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:42:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:15,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:42:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:15,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091350438] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 15:42:15,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:42:15,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 14 [2022-11-25 15:42:15,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900061318] [2022-11-25 15:42:15,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:42:15,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:42:15,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:42:15,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:42:15,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-25 15:42:15,693 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 235 [2022-11-25 15:42:15,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 145 flow. Second operand has 6 states, 6 states have (on average 103.16666666666667) internal successors, (619), 6 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:15,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:42:15,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 235 [2022-11-25 15:42:15,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:42:16,473 INFO L130 PetriNetUnfolder]: 832/1268 cut-off events. [2022-11-25 15:42:16,473 INFO L131 PetriNetUnfolder]: For 1486/1540 co-relation queries the response was YES. [2022-11-25 15:42:16,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4030 conditions, 1268 events. 832/1268 cut-off events. For 1486/1540 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5340 event pairs, 172 based on Foata normal form. 6/1270 useless extension candidates. Maximal degree in co-relation 4020. Up to 409 conditions per place. [2022-11-25 15:42:16,486 INFO L137 encePairwiseOnDemand]: 228/235 looper letters, 99 selfloop transitions, 17 changer transitions 1/118 dead transitions. [2022-11-25 15:42:16,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 118 transitions, 711 flow [2022-11-25 15:42:16,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:42:16,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 15:42:16,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 905 transitions. [2022-11-25 15:42:16,491 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48138297872340424 [2022-11-25 15:42:16,492 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 905 transitions. [2022-11-25 15:42:16,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 905 transitions. [2022-11-25 15:42:16,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:42:16,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 905 transitions. [2022-11-25 15:42:16,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.125) internal successors, (905), 8 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:16,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 235.0) internal successors, (2115), 9 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:16,503 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 235.0) internal successors, (2115), 9 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:16,504 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 145 flow. Second operand 8 states and 905 transitions. [2022-11-25 15:42:16,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 118 transitions, 711 flow [2022-11-25 15:42:16,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 118 transitions, 681 flow, removed 10 selfloop flow, removed 2 redundant places. [2022-11-25 15:42:16,518 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 300 flow [2022-11-25 15:42:16,520 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=300, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2022-11-25 15:42:16,521 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2022-11-25 15:42:16,521 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 300 flow [2022-11-25 15:42:16,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 103.16666666666667) internal successors, (619), 6 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:16,522 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:42:16,522 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:42:16,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:42:16,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 15:42:16,731 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:42:16,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:42:16,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1288166906, now seen corresponding path program 3 times [2022-11-25 15:42:16,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:42:16,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890419736] [2022-11-25 15:42:16,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:42:16,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:42:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:17,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:42:17,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890419736] [2022-11-25 15:42:17,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890419736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:42:17,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:42:17,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 15:42:17,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316934222] [2022-11-25 15:42:17,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:42:17,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:42:17,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:42:17,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:42:17,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:42:17,238 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 235 [2022-11-25 15:42:17,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 300 flow. Second operand has 7 states, 7 states have (on average 99.85714285714286) internal successors, (699), 7 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:17,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:42:17,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 235 [2022-11-25 15:42:17,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:42:17,935 INFO L130 PetriNetUnfolder]: 1177/1784 cut-off events. [2022-11-25 15:42:17,935 INFO L131 PetriNetUnfolder]: For 4819/4819 co-relation queries the response was YES. [2022-11-25 15:42:17,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6861 conditions, 1784 events. 1177/1784 cut-off events. For 4819/4819 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7768 event pairs, 310 based on Foata normal form. 8/1792 useless extension candidates. Maximal degree in co-relation 6846. Up to 794 conditions per place. [2022-11-25 15:42:17,958 INFO L137 encePairwiseOnDemand]: 226/235 looper letters, 78 selfloop transitions, 29 changer transitions 10/117 dead transitions. [2022-11-25 15:42:17,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 117 transitions, 907 flow [2022-11-25 15:42:17,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:42:17,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:42:17,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 759 transitions. [2022-11-25 15:42:17,962 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4613981762917933 [2022-11-25 15:42:17,962 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 759 transitions. [2022-11-25 15:42:17,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 759 transitions. [2022-11-25 15:42:17,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:42:17,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 759 transitions. [2022-11-25 15:42:17,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 108.42857142857143) internal successors, (759), 7 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:17,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:17,972 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:17,972 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 300 flow. Second operand 7 states and 759 transitions. [2022-11-25 15:42:17,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 117 transitions, 907 flow [2022-11-25 15:42:17,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 117 transitions, 897 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-11-25 15:42:17,997 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 556 flow [2022-11-25 15:42:17,998 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=556, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2022-11-25 15:42:17,999 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2022-11-25 15:42:17,999 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 556 flow [2022-11-25 15:42:18,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 99.85714285714286) internal successors, (699), 7 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:18,000 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:42:18,000 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:42:18,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 15:42:18,001 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:42:18,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:42:18,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1420145626, now seen corresponding path program 4 times [2022-11-25 15:42:18,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:42:18,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531850043] [2022-11-25 15:42:18,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:42:18,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:42:18,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:18,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:42:18,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531850043] [2022-11-25 15:42:18,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531850043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:42:18,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103357570] [2022-11-25 15:42:18,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:42:18,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:42:18,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:42:18,299 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:42:18,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:42:18,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:42:18,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:42:18,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:42:18,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:42:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:18,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:42:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:35,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103357570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:42:35,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:42:35,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2022-11-25 15:42:35,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601742272] [2022-11-25 15:42:35,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:42:35,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 15:42:35,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:42:35,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 15:42:35,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=153, Unknown=8, NotChecked=0, Total=210 [2022-11-25 15:42:35,682 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 235 [2022-11-25 15:42:35,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 556 flow. Second operand has 15 states, 15 states have (on average 99.53333333333333) internal successors, (1493), 15 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:35,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:42:35,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 235 [2022-11-25 15:42:35,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:42:38,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:42:40,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:42:42,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:42:44,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:42:46,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:42:48,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:42:50,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:42:52,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:42:54,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:42:56,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:42:58,655 WARN L837 $PredicateComparison]: unable to prove that (and (<= (+ (* 4294967296 (div c_~b~0 4294967296)) 1) c_~b~0) (forall ((aux_mod_~a~0_35 Int)) (let ((.cse0 (mod (+ (* 4294967295 aux_mod_~a~0_35) 4294967295) 4294967296))) (or (< (+ (mod c_thread3Thread1of1ForFork2_~i~2 4294967296) aux_mod_~a~0_35) 4294967295) (>= aux_mod_~a~0_35 4294967296) (not (< (mod c_thread1Thread1of1ForFork1_~i~0 4294967296) .cse0)) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse0))))) is different from false [2022-11-25 15:43:00,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:43:02,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:43:04,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:43:06,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:43:08,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:43:23,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:43:25,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:43:27,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:43:31,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:43:33,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:43:38,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:43:40,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:43:42,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:43:45,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:43:47,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:43:48,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:43:50,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:43:51,005 INFO L130 PetriNetUnfolder]: 2510/3744 cut-off events. [2022-11-25 15:43:51,006 INFO L131 PetriNetUnfolder]: For 19362/19362 co-relation queries the response was YES. [2022-11-25 15:43:51,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17513 conditions, 3744 events. 2510/3744 cut-off events. For 19362/19362 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 18567 event pairs, 242 based on Foata normal form. 14/3758 useless extension candidates. Maximal degree in co-relation 17492. Up to 1888 conditions per place. [2022-11-25 15:43:51,065 INFO L137 encePairwiseOnDemand]: 221/235 looper letters, 171 selfloop transitions, 178 changer transitions 3/352 dead transitions. [2022-11-25 15:43:51,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 352 transitions, 3348 flow [2022-11-25 15:43:51,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 15:43:51,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 15:43:51,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2261 transitions. [2022-11-25 15:43:51,074 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4581560283687943 [2022-11-25 15:43:51,074 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2261 transitions. [2022-11-25 15:43:51,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2261 transitions. [2022-11-25 15:43:51,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:43:51,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2261 transitions. [2022-11-25 15:43:51,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 107.66666666666667) internal successors, (2261), 21 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:51,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 235.0) internal successors, (5170), 22 states have internal predecessors, (5170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:51,092 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 235.0) internal successors, (5170), 22 states have internal predecessors, (5170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:51,092 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 556 flow. Second operand 21 states and 2261 transitions. [2022-11-25 15:43:51,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 352 transitions, 3348 flow [2022-11-25 15:43:51,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 352 transitions, 3310 flow, removed 19 selfloop flow, removed 1 redundant places. [2022-11-25 15:43:51,165 INFO L231 Difference]: Finished difference. Result has 97 places, 238 transitions, 3004 flow [2022-11-25 15:43:51,166 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3004, PETRI_PLACES=97, PETRI_TRANSITIONS=238} [2022-11-25 15:43:51,168 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2022-11-25 15:43:51,168 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 238 transitions, 3004 flow [2022-11-25 15:43:51,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 99.53333333333333) internal successors, (1493), 15 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:51,169 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:43:51,169 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:51,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:43:51,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 15:43:51,377 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:43:51,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:51,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1858760768, now seen corresponding path program 5 times [2022-11-25 15:43:51,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:51,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533005737] [2022-11-25 15:43:51,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:51,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:43:51,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:51,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533005737] [2022-11-25 15:43:51,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533005737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:43:51,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985487014] [2022-11-25 15:43:51,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:43:51,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:43:51,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:43:51,772 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:43:51,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:43:51,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:43:51,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:43:51,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 15:43:51,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:43:52,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:43:52,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:43:52,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:43:52,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985487014] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 15:43:52,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:43:52,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 12 [2022-11-25 15:43:52,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483751028] [2022-11-25 15:43:52,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:43:52,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:43:52,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:52,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:43:52,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:43:52,370 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 235 [2022-11-25 15:43:52,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 238 transitions, 3004 flow. Second operand has 7 states, 7 states have (on average 98.85714285714286) internal successors, (692), 7 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:52,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:43:52,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 235 [2022-11-25 15:43:52,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:43:54,046 INFO L130 PetriNetUnfolder]: 3047/4624 cut-off events. [2022-11-25 15:43:54,047 INFO L131 PetriNetUnfolder]: For 50322/50322 co-relation queries the response was YES. [2022-11-25 15:43:54,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30803 conditions, 4624 events. 3047/4624 cut-off events. For 50322/50322 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24173 event pairs, 158 based on Foata normal form. 6/4630 useless extension candidates. Maximal degree in co-relation 30769. Up to 1813 conditions per place. [2022-11-25 15:43:54,133 INFO L137 encePairwiseOnDemand]: 227/235 looper letters, 215 selfloop transitions, 217 changer transitions 0/432 dead transitions. [2022-11-25 15:43:54,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 432 transitions, 6160 flow [2022-11-25 15:43:54,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:43:54,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 15:43:54,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 968 transitions. [2022-11-25 15:43:54,138 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45768321513002364 [2022-11-25 15:43:54,138 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 968 transitions. [2022-11-25 15:43:54,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 968 transitions. [2022-11-25 15:43:54,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:43:54,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 968 transitions. [2022-11-25 15:43:54,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 107.55555555555556) internal successors, (968), 9 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:54,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 235.0) internal successors, (2350), 10 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:54,148 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 235.0) internal successors, (2350), 10 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:54,148 INFO L175 Difference]: Start difference. First operand has 97 places, 238 transitions, 3004 flow. Second operand 9 states and 968 transitions. [2022-11-25 15:43:54,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 432 transitions, 6160 flow [2022-11-25 15:43:54,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 432 transitions, 5632 flow, removed 264 selfloop flow, removed 0 redundant places. [2022-11-25 15:43:54,444 INFO L231 Difference]: Finished difference. Result has 111 places, 332 transitions, 4707 flow [2022-11-25 15:43:54,444 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=2590, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4707, PETRI_PLACES=111, PETRI_TRANSITIONS=332} [2022-11-25 15:43:54,445 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2022-11-25 15:43:54,445 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 332 transitions, 4707 flow [2022-11-25 15:43:54,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 98.85714285714286) internal successors, (692), 7 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:54,446 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:43:54,446 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:54,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 15:43:54,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 15:43:54,654 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:43:54,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:54,654 INFO L85 PathProgramCache]: Analyzing trace with hash -994441118, now seen corresponding path program 6 times [2022-11-25 15:43:54,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:54,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205262865] [2022-11-25 15:43:54,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:54,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:43:54,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:54,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205262865] [2022-11-25 15:43:54,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205262865] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:43:54,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055496385] [2022-11-25 15:43:54,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:43:54,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:43:54,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:43:54,996 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:43:55,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 15:43:55,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 15:43:55,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:43:55,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 15:43:55,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:43:55,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:43:55,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:43:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:43:55,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055496385] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 15:43:55,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:43:55,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 11 [2022-11-25 15:43:55,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636121504] [2022-11-25 15:43:55,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:43:55,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:43:55,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:55,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:43:55,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-25 15:43:55,669 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 235 [2022-11-25 15:43:55,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 332 transitions, 4707 flow. Second operand has 6 states, 6 states have (on average 103.16666666666667) internal successors, (619), 6 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:55,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:43:55,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 235 [2022-11-25 15:43:55,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:43:57,758 INFO L130 PetriNetUnfolder]: 3427/5239 cut-off events. [2022-11-25 15:43:57,759 INFO L131 PetriNetUnfolder]: For 69924/69951 co-relation queries the response was YES. [2022-11-25 15:43:57,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37698 conditions, 5239 events. 3427/5239 cut-off events. For 69924/69951 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 28576 event pairs, 343 based on Foata normal form. 27/5245 useless extension candidates. Maximal degree in co-relation 37658. Up to 2048 conditions per place. [2022-11-25 15:43:57,925 INFO L137 encePairwiseOnDemand]: 228/235 looper letters, 333 selfloop transitions, 201 changer transitions 1/540 dead transitions. [2022-11-25 15:43:57,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 540 transitions, 8416 flow [2022-11-25 15:43:57,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:43:57,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 15:43:57,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 905 transitions. [2022-11-25 15:43:57,930 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48138297872340424 [2022-11-25 15:43:57,930 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 905 transitions. [2022-11-25 15:43:57,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 905 transitions. [2022-11-25 15:43:57,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:43:57,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 905 transitions. [2022-11-25 15:43:57,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.125) internal successors, (905), 8 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:57,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 235.0) internal successors, (2115), 9 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:57,940 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 235.0) internal successors, (2115), 9 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:57,940 INFO L175 Difference]: Start difference. First operand has 111 places, 332 transitions, 4707 flow. Second operand 8 states and 905 transitions. [2022-11-25 15:43:57,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 540 transitions, 8416 flow [2022-11-25 15:43:58,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 540 transitions, 8342 flow, removed 37 selfloop flow, removed 0 redundant places. [2022-11-25 15:43:58,447 INFO L231 Difference]: Finished difference. Result has 123 places, 408 transitions, 6728 flow [2022-11-25 15:43:58,448 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=4651, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6728, PETRI_PLACES=123, PETRI_TRANSITIONS=408} [2022-11-25 15:43:58,450 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2022-11-25 15:43:58,450 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 408 transitions, 6728 flow [2022-11-25 15:43:58,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 103.16666666666667) internal successors, (619), 6 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:58,451 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:43:58,451 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:58,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 15:43:58,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 15:43:58,660 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:43:58,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:58,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1566771862, now seen corresponding path program 7 times [2022-11-25 15:43:58,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:58,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130499688] [2022-11-25 15:43:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:58,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:43:58,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:58,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130499688] [2022-11-25 15:43:58,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130499688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:43:58,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071016166] [2022-11-25 15:43:58,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:43:58,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:43:58,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:43:58,995 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:43:59,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 15:43:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:59,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 15:43:59,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:43:59,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:43:59,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:44:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:44:27,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071016166] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:44:27,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:44:27,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-25 15:44:27,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200858835] [2022-11-25 15:44:27,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:44:27,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 15:44:27,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:27,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 15:44:27,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=106, Unknown=10, NotChecked=0, Total=156 [2022-11-25 15:44:29,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:44:31,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:44:33,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:44:35,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:44:37,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:44:39,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:44:41,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:44:43,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:44:45,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:44:47,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:44:49,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:44:49,454 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 235 [2022-11-25 15:44:49,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 408 transitions, 6728 flow. Second operand has 13 states, 13 states have (on average 95.6923076923077) internal successors, (1244), 13 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:49,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:44:49,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 235 [2022-11-25 15:44:49,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:44:53,028 INFO L130 PetriNetUnfolder]: 4513/7301 cut-off events. [2022-11-25 15:44:53,028 INFO L131 PetriNetUnfolder]: For 112497/112497 co-relation queries the response was YES. [2022-11-25 15:44:53,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54990 conditions, 7301 events. 4513/7301 cut-off events. For 112497/112497 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 46102 event pairs, 375 based on Foata normal form. 56/7351 useless extension candidates. Maximal degree in co-relation 54944. Up to 3006 conditions per place. [2022-11-25 15:44:53,173 INFO L137 encePairwiseOnDemand]: 226/235 looper letters, 441 selfloop transitions, 365 changer transitions 8/814 dead transitions. [2022-11-25 15:44:53,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 814 transitions, 13988 flow [2022-11-25 15:44:53,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 15:44:53,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 15:44:53,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1485 transitions. [2022-11-25 15:44:53,179 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4513677811550152 [2022-11-25 15:44:53,179 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1485 transitions. [2022-11-25 15:44:53,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1485 transitions. [2022-11-25 15:44:53,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:44:53,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1485 transitions. [2022-11-25 15:44:53,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 106.07142857142857) internal successors, (1485), 14 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) [2022-11-25 15:44:53,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 235.0) internal successors, (3525), 15 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:53,193 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 235.0) internal successors, (3525), 15 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:53,193 INFO L175 Difference]: Start difference. First operand has 123 places, 408 transitions, 6728 flow. Second operand 14 states and 1485 transitions. [2022-11-25 15:44:53,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 814 transitions, 13988 flow [2022-11-25 15:44:53,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 814 transitions, 13952 flow, removed 18 selfloop flow, removed 0 redundant places. [2022-11-25 15:44:53,736 INFO L231 Difference]: Finished difference. Result has 144 places, 547 transitions, 10624 flow [2022-11-25 15:44:53,736 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=6704, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10624, PETRI_PLACES=144, PETRI_TRANSITIONS=547} [2022-11-25 15:44:53,738 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2022-11-25 15:44:53,739 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 547 transitions, 10624 flow [2022-11-25 15:44:53,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 95.6923076923077) internal successors, (1244), 13 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:53,740 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:44:53,740 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:53,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 15:44:53,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:53,949 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:44:53,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:53,949 INFO L85 PathProgramCache]: Analyzing trace with hash -821396644, now seen corresponding path program 8 times [2022-11-25 15:44:53,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:44:53,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191637027] [2022-11-25 15:44:53,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:53,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:44:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:44:54,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:44:54,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191637027] [2022-11-25 15:44:54,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191637027] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:44:54,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477689619] [2022-11-25 15:44:54,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:44:54,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:54,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:44:54,338 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:44:54,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 15:44:54,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:44:54,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:44:54,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:44:54,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:44:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:44:54,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:44:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:44:55,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477689619] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 15:44:55,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:44:55,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2022-11-25 15:44:55,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155445631] [2022-11-25 15:44:55,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:44:55,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:44:55,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:55,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:44:55,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:44:55,136 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 235 [2022-11-25 15:44:55,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 547 transitions, 10624 flow. Second operand has 6 states, 6 states have (on average 103.16666666666667) internal successors, (619), 6 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:55,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:44:55,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 235 [2022-11-25 15:44:55,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:44:57,605 INFO L130 PetriNetUnfolder]: 4447/7199 cut-off events. [2022-11-25 15:44:57,606 INFO L131 PetriNetUnfolder]: For 141706/141789 co-relation queries the response was YES. [2022-11-25 15:44:57,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58227 conditions, 7199 events. 4447/7199 cut-off events. For 141706/141789 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 45462 event pairs, 743 based on Foata normal form. 29/7174 useless extension candidates. Maximal degree in co-relation 58172. Up to 3523 conditions per place. [2022-11-25 15:44:57,803 INFO L137 encePairwiseOnDemand]: 228/235 looper letters, 462 selfloop transitions, 156 changer transitions 1/632 dead transitions. [2022-11-25 15:44:57,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 632 transitions, 12859 flow [2022-11-25 15:44:57,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:44:57,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:44:57,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 676 transitions. [2022-11-25 15:44:57,811 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4794326241134752 [2022-11-25 15:44:57,812 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 676 transitions. [2022-11-25 15:44:57,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 676 transitions. [2022-11-25 15:44:57,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:44:57,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 676 transitions. [2022-11-25 15:44:57,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 112.66666666666667) internal successors, (676), 6 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:57,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 235.0) internal successors, (1645), 7 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:57,824 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 235.0) internal successors, (1645), 7 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:57,825 INFO L175 Difference]: Start difference. First operand has 144 places, 547 transitions, 10624 flow. Second operand 6 states and 676 transitions. [2022-11-25 15:44:57,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 632 transitions, 12859 flow [2022-11-25 15:44:58,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 632 transitions, 12654 flow, removed 40 selfloop flow, removed 1 redundant places. [2022-11-25 15:44:58,500 INFO L231 Difference]: Finished difference. Result has 151 places, 554 transitions, 11011 flow [2022-11-25 15:44:58,500 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=10426, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11011, PETRI_PLACES=151, PETRI_TRANSITIONS=554} [2022-11-25 15:44:58,501 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2022-11-25 15:44:58,501 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 554 transitions, 11011 flow [2022-11-25 15:44:58,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 103.16666666666667) internal successors, (619), 6 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:58,502 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:44:58,502 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:58,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 15:44:58,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:58,709 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:44:58,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:58,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1136723652, now seen corresponding path program 1 times [2022-11-25 15:44:58,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:44:58,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865859080] [2022-11-25 15:44:58,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:58,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:44:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:44:58,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:44:58,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865859080] [2022-11-25 15:44:58,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865859080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:44:58,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:44:58,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 15:44:58,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639771805] [2022-11-25 15:44:58,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:44:58,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:44:58,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:58,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:44:58,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:44:59,121 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 235 [2022-11-25 15:44:59,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 554 transitions, 11011 flow. Second operand has 7 states, 7 states have (on average 99.85714285714286) internal successors, (699), 7 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:59,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:44:59,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 235 [2022-11-25 15:44:59,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:45:01,752 INFO L130 PetriNetUnfolder]: 4584/7440 cut-off events. [2022-11-25 15:45:01,752 INFO L131 PetriNetUnfolder]: For 145392/145392 co-relation queries the response was YES. [2022-11-25 15:45:01,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60493 conditions, 7440 events. 4584/7440 cut-off events. For 145392/145392 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 47166 event pairs, 855 based on Foata normal form. 4/7438 useless extension candidates. Maximal degree in co-relation 60435. Up to 3879 conditions per place. [2022-11-25 15:45:01,854 INFO L137 encePairwiseOnDemand]: 227/235 looper letters, 372 selfloop transitions, 265 changer transitions 3/640 dead transitions. [2022-11-25 15:45:01,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 640 transitions, 13374 flow [2022-11-25 15:45:01,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:45:01,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:45:01,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 760 transitions. [2022-11-25 15:45:01,858 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46200607902735563 [2022-11-25 15:45:01,858 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 760 transitions. [2022-11-25 15:45:01,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 760 transitions. [2022-11-25 15:45:01,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:45:01,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 760 transitions. [2022-11-25 15:45:01,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 108.57142857142857) internal successors, (760), 7 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:01,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:01,875 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:01,876 INFO L175 Difference]: Start difference. First operand has 151 places, 554 transitions, 11011 flow. Second operand 7 states and 760 transitions. [2022-11-25 15:45:01,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 640 transitions, 13374 flow [2022-11-25 15:45:02,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 640 transitions, 13128 flow, removed 24 selfloop flow, removed 2 redundant places. [2022-11-25 15:45:02,731 INFO L231 Difference]: Finished difference. Result has 160 places, 576 transitions, 12077 flow [2022-11-25 15:45:02,731 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=10793, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12077, PETRI_PLACES=160, PETRI_TRANSITIONS=576} [2022-11-25 15:45:02,732 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2022-11-25 15:45:02,732 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 576 transitions, 12077 flow [2022-11-25 15:45:02,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 99.85714285714286) internal successors, (699), 7 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:02,732 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:45:02,733 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:02,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 15:45:02,733 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:45:02,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:02,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1627542596, now seen corresponding path program 9 times [2022-11-25 15:45:02,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:02,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480384768] [2022-11-25 15:45:02,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:02,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:03,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:03,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:03,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480384768] [2022-11-25 15:45:03,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480384768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:45:03,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95063687] [2022-11-25 15:45:03,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:45:03,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:03,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:45:03,059 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:45:03,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 15:45:03,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 15:45:03,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:45:03,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:45:03,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:45:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:03,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:45:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:03,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95063687] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 15:45:03,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:45:03,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2022-11-25 15:45:03,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094762578] [2022-11-25 15:45:03,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:45:03,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:45:03,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:03,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:45:03,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:45:03,946 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 235 [2022-11-25 15:45:03,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 576 transitions, 12077 flow. Second operand has 6 states, 6 states have (on average 103.16666666666667) internal successors, (619), 6 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:03,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:45:03,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 235 [2022-11-25 15:45:03,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:45:06,727 INFO L130 PetriNetUnfolder]: 4513/7334 cut-off events. [2022-11-25 15:45:06,727 INFO L131 PetriNetUnfolder]: For 156223/156286 co-relation queries the response was YES. [2022-11-25 15:45:06,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61567 conditions, 7334 events. 4513/7334 cut-off events. For 156223/156286 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 46784 event pairs, 825 based on Foata normal form. 20/7303 useless extension candidates. Maximal degree in co-relation 61504. Up to 3749 conditions per place. [2022-11-25 15:45:06,831 INFO L137 encePairwiseOnDemand]: 228/235 looper letters, 513 selfloop transitions, 139 changer transitions 1/670 dead transitions. [2022-11-25 15:45:06,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 670 transitions, 14448 flow [2022-11-25 15:45:06,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:45:06,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:45:06,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 678 transitions. [2022-11-25 15:45:06,837 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4808510638297872 [2022-11-25 15:45:06,837 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 678 transitions. [2022-11-25 15:45:06,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 678 transitions. [2022-11-25 15:45:06,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:45:06,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 678 transitions. [2022-11-25 15:45:06,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:06,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 235.0) internal successors, (1645), 7 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:06,843 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 235.0) internal successors, (1645), 7 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:06,843 INFO L175 Difference]: Start difference. First operand has 160 places, 576 transitions, 12077 flow. Second operand 6 states and 678 transitions. [2022-11-25 15:45:06,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 670 transitions, 14448 flow [2022-11-25 15:45:07,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 670 transitions, 14174 flow, removed 23 selfloop flow, removed 1 redundant places. [2022-11-25 15:45:07,673 INFO L231 Difference]: Finished difference. Result has 167 places, 583 transitions, 12356 flow [2022-11-25 15:45:07,674 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=11785, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12356, PETRI_PLACES=167, PETRI_TRANSITIONS=583} [2022-11-25 15:45:07,674 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2022-11-25 15:45:07,674 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 583 transitions, 12356 flow [2022-11-25 15:45:07,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 103.16666666666667) internal successors, (619), 6 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:07,675 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:45:07,675 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:07,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 15:45:07,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 15:45:07,876 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:45:07,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:07,877 INFO L85 PathProgramCache]: Analyzing trace with hash 624914160, now seen corresponding path program 2 times [2022-11-25 15:45:07,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:07,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814313441] [2022-11-25 15:45:07,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:07,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:08,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:08,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814313441] [2022-11-25 15:45:08,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814313441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:45:08,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:45:08,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 15:45:08,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423195187] [2022-11-25 15:45:08,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:45:08,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:45:08,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:08,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:45:08,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:45:08,246 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 235 [2022-11-25 15:45:08,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 583 transitions, 12356 flow. Second operand has 7 states, 7 states have (on average 99.85714285714286) internal successors, (699), 7 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:08,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:45:08,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 235 [2022-11-25 15:45:08,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:45:11,581 INFO L130 PetriNetUnfolder]: 4579/7435 cut-off events. [2022-11-25 15:45:11,581 INFO L131 PetriNetUnfolder]: For 165951/165951 co-relation queries the response was YES. [2022-11-25 15:45:11,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62373 conditions, 7435 events. 4579/7435 cut-off events. For 165951/165951 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 47241 event pairs, 1028 based on Foata normal form. 8/7437 useless extension candidates. Maximal degree in co-relation 62307. Up to 5132 conditions per place. [2022-11-25 15:45:11,727 INFO L137 encePairwiseOnDemand]: 227/235 looper letters, 556 selfloop transitions, 114 changer transitions 3/673 dead transitions. [2022-11-25 15:45:11,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 673 transitions, 14751 flow [2022-11-25 15:45:11,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:45:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:45:11,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 765 transitions. [2022-11-25 15:45:11,734 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46504559270516715 [2022-11-25 15:45:11,734 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 765 transitions. [2022-11-25 15:45:11,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 765 transitions. [2022-11-25 15:45:11,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:45:11,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 765 transitions. [2022-11-25 15:45:11,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 109.28571428571429) internal successors, (765), 7 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:11,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:11,743 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:11,743 INFO L175 Difference]: Start difference. First operand has 167 places, 583 transitions, 12356 flow. Second operand 7 states and 765 transitions. [2022-11-25 15:45:11,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 673 transitions, 14751 flow [2022-11-25 15:45:12,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 673 transitions, 14559 flow, removed 13 selfloop flow, removed 2 redundant places. [2022-11-25 15:45:12,587 INFO L231 Difference]: Finished difference. Result has 175 places, 601 transitions, 12926 flow [2022-11-25 15:45:12,588 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=12176, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12926, PETRI_PLACES=175, PETRI_TRANSITIONS=601} [2022-11-25 15:45:12,589 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2022-11-25 15:45:12,589 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 601 transitions, 12926 flow [2022-11-25 15:45:12,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 99.85714285714286) internal successors, (699), 7 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:12,590 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:45:12,590 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:12,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 15:45:12,591 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:45:12,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:12,592 INFO L85 PathProgramCache]: Analyzing trace with hash -265800716, now seen corresponding path program 3 times [2022-11-25 15:45:12,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:12,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676058728] [2022-11-25 15:45:12,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:12,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:12,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:12,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676058728] [2022-11-25 15:45:12,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676058728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:45:12,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:45:12,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 15:45:12,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289063829] [2022-11-25 15:45:12,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:45:12,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:45:12,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:12,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:45:12,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:45:13,106 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 235 [2022-11-25 15:45:13,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 601 transitions, 12926 flow. Second operand has 7 states, 7 states have (on average 100.85714285714286) internal successors, (706), 7 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:13,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:45:13,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 235 [2022-11-25 15:45:13,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:45:16,213 INFO L130 PetriNetUnfolder]: 4734/7728 cut-off events. [2022-11-25 15:45:16,213 INFO L131 PetriNetUnfolder]: For 179711/179711 co-relation queries the response was YES. [2022-11-25 15:45:16,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65750 conditions, 7728 events. 4734/7728 cut-off events. For 179711/179711 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 50069 event pairs, 1012 based on Foata normal form. 36/7758 useless extension candidates. Maximal degree in co-relation 65680. Up to 5132 conditions per place. [2022-11-25 15:45:16,336 INFO L137 encePairwiseOnDemand]: 227/235 looper letters, 614 selfloop transitions, 92 changer transitions 22/728 dead transitions. [2022-11-25 15:45:16,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 728 transitions, 16148 flow [2022-11-25 15:45:16,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:45:16,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:45:16,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 766 transitions. [2022-11-25 15:45:16,341 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4656534954407295 [2022-11-25 15:45:16,341 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 766 transitions. [2022-11-25 15:45:16,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 766 transitions. [2022-11-25 15:45:16,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:45:16,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 766 transitions. [2022-11-25 15:45:16,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 109.42857142857143) internal successors, (766), 7 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:16,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:16,348 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:16,348 INFO L175 Difference]: Start difference. First operand has 175 places, 601 transitions, 12926 flow. Second operand 7 states and 766 transitions. [2022-11-25 15:45:16,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 728 transitions, 16148 flow [2022-11-25 15:45:17,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 728 transitions, 15984 flow, removed 45 selfloop flow, removed 1 redundant places. [2022-11-25 15:45:17,275 INFO L231 Difference]: Finished difference. Result has 185 places, 619 transitions, 13541 flow [2022-11-25 15:45:17,275 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=12788, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13541, PETRI_PLACES=185, PETRI_TRANSITIONS=619} [2022-11-25 15:45:17,276 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2022-11-25 15:45:17,276 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 619 transitions, 13541 flow [2022-11-25 15:45:17,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 100.85714285714286) internal successors, (706), 7 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:17,277 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:45:17,277 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:17,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-25 15:45:17,278 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:45:17,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:17,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1588873094, now seen corresponding path program 4 times [2022-11-25 15:45:17,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:17,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799715338] [2022-11-25 15:45:17,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:17,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:17,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:17,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799715338] [2022-11-25 15:45:17,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799715338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:45:17,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:45:17,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 15:45:17,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385371629] [2022-11-25 15:45:17,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:45:17,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:45:17,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:17,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:45:17,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:45:17,801 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 235 [2022-11-25 15:45:17,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 619 transitions, 13541 flow. Second operand has 7 states, 7 states have (on average 100.85714285714286) internal successors, (706), 7 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:17,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:45:17,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 235 [2022-11-25 15:45:17,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:45:21,182 INFO L130 PetriNetUnfolder]: 4707/7735 cut-off events. [2022-11-25 15:45:21,182 INFO L131 PetriNetUnfolder]: For 188410/188410 co-relation queries the response was YES. [2022-11-25 15:45:21,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66921 conditions, 7735 events. 4707/7735 cut-off events. For 188410/188410 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 50506 event pairs, 1050 based on Foata normal form. 42/7771 useless extension candidates. Maximal degree in co-relation 66846. Up to 5132 conditions per place. [2022-11-25 15:45:21,423 INFO L137 encePairwiseOnDemand]: 227/235 looper letters, 561 selfloop transitions, 118 changer transitions 14/693 dead transitions. [2022-11-25 15:45:21,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 693 transitions, 15651 flow [2022-11-25 15:45:21,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:45:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:45:21,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 771 transitions. [2022-11-25 15:45:21,425 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46869300911854106 [2022-11-25 15:45:21,426 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 771 transitions. [2022-11-25 15:45:21,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 771 transitions. [2022-11-25 15:45:21,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:45:21,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 771 transitions. [2022-11-25 15:45:21,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.14285714285714) internal successors, (771), 7 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:21,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:21,433 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:21,433 INFO L175 Difference]: Start difference. First operand has 185 places, 619 transitions, 13541 flow. Second operand 7 states and 771 transitions. [2022-11-25 15:45:21,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 693 transitions, 15651 flow [2022-11-25 15:45:22,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 693 transitions, 15437 flow, removed 70 selfloop flow, removed 2 redundant places. [2022-11-25 15:45:22,393 INFO L231 Difference]: Finished difference. Result has 191 places, 620 transitions, 13646 flow [2022-11-25 15:45:22,394 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=13341, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13646, PETRI_PLACES=191, PETRI_TRANSITIONS=620} [2022-11-25 15:45:22,394 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2022-11-25 15:45:22,394 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 620 transitions, 13646 flow [2022-11-25 15:45:22,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 100.85714285714286) internal successors, (706), 7 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:22,395 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:45:22,395 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:22,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-25 15:45:22,395 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:45:22,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:22,396 INFO L85 PathProgramCache]: Analyzing trace with hash -450694863, now seen corresponding path program 1 times [2022-11-25 15:45:22,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:22,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373199577] [2022-11-25 15:45:22,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:22,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:22,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:22,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373199577] [2022-11-25 15:45:22,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373199577] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:45:22,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819034138] [2022-11-25 15:45:22,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:22,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:22,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:45:22,649 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:45:22,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 15:45:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:22,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 15:45:22,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:45:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:22,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:45:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:23,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819034138] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:45:23,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:45:23,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-25 15:45:23,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578285022] [2022-11-25 15:45:23,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:45:23,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:45:23,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:23,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:45:23,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:45:23,374 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 235 [2022-11-25 15:45:23,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 620 transitions, 13646 flow. Second operand has 12 states, 12 states have (on average 99.75) internal successors, (1197), 12 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:23,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:45:23,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 235 [2022-11-25 15:45:23,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:45:27,156 INFO L130 PetriNetUnfolder]: 4770/7816 cut-off events. [2022-11-25 15:45:27,156 INFO L131 PetriNetUnfolder]: For 185258/185258 co-relation queries the response was YES. [2022-11-25 15:45:27,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67445 conditions, 7816 events. 4770/7816 cut-off events. For 185258/185258 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 50895 event pairs, 831 based on Foata normal form. 26/7836 useless extension candidates. Maximal degree in co-relation 67368. Up to 3779 conditions per place. [2022-11-25 15:45:27,293 INFO L137 encePairwiseOnDemand]: 226/235 looper letters, 430 selfloop transitions, 324 changer transitions 6/760 dead transitions. [2022-11-25 15:45:27,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 760 transitions, 16822 flow [2022-11-25 15:45:27,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 15:45:27,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 15:45:27,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1085 transitions. [2022-11-25 15:45:27,297 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46170212765957447 [2022-11-25 15:45:27,297 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1085 transitions. [2022-11-25 15:45:27,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1085 transitions. [2022-11-25 15:45:27,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:45:27,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1085 transitions. [2022-11-25 15:45:27,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 108.5) internal successors, (1085), 10 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:27,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 235.0) internal successors, (2585), 11 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:27,305 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 235.0) internal successors, (2585), 11 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:27,305 INFO L175 Difference]: Start difference. First operand has 191 places, 620 transitions, 13646 flow. Second operand 10 states and 1085 transitions. [2022-11-25 15:45:27,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 760 transitions, 16822 flow [2022-11-25 15:45:28,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 760 transitions, 16619 flow, removed 18 selfloop flow, removed 4 redundant places. [2022-11-25 15:45:28,449 INFO L231 Difference]: Finished difference. Result has 197 places, 644 transitions, 14656 flow [2022-11-25 15:45:28,450 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=13411, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14656, PETRI_PLACES=197, PETRI_TRANSITIONS=644} [2022-11-25 15:45:28,450 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2022-11-25 15:45:28,451 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 644 transitions, 14656 flow [2022-11-25 15:45:28,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 99.75) internal successors, (1197), 12 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:28,451 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:45:28,452 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:28,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 15:45:28,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-25 15:45:28,661 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:45:28,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:28,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1451782108, now seen corresponding path program 10 times [2022-11-25 15:45:28,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:28,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017619504] [2022-11-25 15:45:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:28,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:28,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:28,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017619504] [2022-11-25 15:45:28,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017619504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:45:28,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276334972] [2022-11-25 15:45:28,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:45:28,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:28,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:45:28,915 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:45:28,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 15:45:29,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:45:29,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:45:29,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 15:45:29,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:45:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:29,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:45:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:29,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276334972] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 15:45:29,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:45:29,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 11 [2022-11-25 15:45:29,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273490547] [2022-11-25 15:45:29,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:45:29,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:45:29,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:29,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:45:29,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-25 15:45:29,565 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 235 [2022-11-25 15:45:29,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 644 transitions, 14656 flow. Second operand has 6 states, 6 states have (on average 103.16666666666667) internal successors, (619), 6 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:29,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:45:29,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 235 [2022-11-25 15:45:29,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:45:32,745 INFO L130 PetriNetUnfolder]: 4693/7688 cut-off events. [2022-11-25 15:45:32,745 INFO L131 PetriNetUnfolder]: For 198563/198600 co-relation queries the response was YES. [2022-11-25 15:45:32,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68122 conditions, 7688 events. 4693/7688 cut-off events. For 198563/198600 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 49995 event pairs, 929 based on Foata normal form. 22/7675 useless extension candidates. Maximal degree in co-relation 68044. Up to 3753 conditions per place. [2022-11-25 15:45:32,858 INFO L137 encePairwiseOnDemand]: 228/235 looper letters, 565 selfloop transitions, 143 changer transitions 1/727 dead transitions. [2022-11-25 15:45:32,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 727 transitions, 16990 flow [2022-11-25 15:45:32,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:45:32,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:45:32,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 676 transitions. [2022-11-25 15:45:32,861 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4794326241134752 [2022-11-25 15:45:32,861 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 676 transitions. [2022-11-25 15:45:32,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 676 transitions. [2022-11-25 15:45:32,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:45:32,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 676 transitions. [2022-11-25 15:45:32,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 112.66666666666667) internal successors, (676), 6 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:32,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 235.0) internal successors, (1645), 7 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:32,864 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 235.0) internal successors, (1645), 7 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:32,864 INFO L175 Difference]: Start difference. First operand has 197 places, 644 transitions, 14656 flow. Second operand 6 states and 676 transitions. [2022-11-25 15:45:32,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 727 transitions, 16990 flow [2022-11-25 15:45:34,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 727 transitions, 16787 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-11-25 15:45:34,098 INFO L231 Difference]: Finished difference. Result has 199 places, 644 transitions, 14751 flow [2022-11-25 15:45:34,099 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=14453, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=14751, PETRI_PLACES=199, PETRI_TRANSITIONS=644} [2022-11-25 15:45:34,099 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2022-11-25 15:45:34,099 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 644 transitions, 14751 flow [2022-11-25 15:45:34,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 103.16666666666667) internal successors, (619), 6 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:34,100 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:45:34,100 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:34,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 15:45:34,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:34,302 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:45:34,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:34,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1782858450, now seen corresponding path program 5 times [2022-11-25 15:45:34,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:34,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311442876] [2022-11-25 15:45:34,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:34,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:34,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:34,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:34,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311442876] [2022-11-25 15:45:34,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311442876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:45:34,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:45:34,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 15:45:34,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184022487] [2022-11-25 15:45:34,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:45:34,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:45:34,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:34,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:45:34,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:45:34,836 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 235 [2022-11-25 15:45:34,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 644 transitions, 14751 flow. Second operand has 7 states, 7 states have (on average 100.85714285714286) internal successors, (706), 7 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:34,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:45:34,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 235 [2022-11-25 15:45:34,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:45:38,399 INFO L130 PetriNetUnfolder]: 4679/7645 cut-off events. [2022-11-25 15:45:38,399 INFO L131 PetriNetUnfolder]: For 201834/201834 co-relation queries the response was YES. [2022-11-25 15:45:38,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67633 conditions, 7645 events. 4679/7645 cut-off events. For 201834/201834 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 49217 event pairs, 1082 based on Foata normal form. 36/7675 useless extension candidates. Maximal degree in co-relation 67553. Up to 5080 conditions per place. [2022-11-25 15:45:38,541 INFO L137 encePairwiseOnDemand]: 227/235 looper letters, 585 selfloop transitions, 118 changer transitions 17/720 dead transitions. [2022-11-25 15:45:38,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 720 transitions, 16966 flow [2022-11-25 15:45:38,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:45:38,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:45:38,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 771 transitions. [2022-11-25 15:45:38,547 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46869300911854106 [2022-11-25 15:45:38,547 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 771 transitions. [2022-11-25 15:45:38,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 771 transitions. [2022-11-25 15:45:38,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:45:38,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 771 transitions. [2022-11-25 15:45:38,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.14285714285714) internal successors, (771), 7 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:38,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:38,551 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:38,551 INFO L175 Difference]: Start difference. First operand has 199 places, 644 transitions, 14751 flow. Second operand 7 states and 771 transitions. [2022-11-25 15:45:38,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 720 transitions, 16966 flow [2022-11-25 15:45:39,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 720 transitions, 16715 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-11-25 15:45:39,777 INFO L231 Difference]: Finished difference. Result has 205 places, 645 transitions, 14832 flow [2022-11-25 15:45:39,778 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=14386, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14832, PETRI_PLACES=205, PETRI_TRANSITIONS=645} [2022-11-25 15:45:39,778 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2022-11-25 15:45:39,779 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 645 transitions, 14832 flow [2022-11-25 15:45:39,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 100.85714285714286) internal successors, (706), 7 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:39,779 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:45:39,779 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:39,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-25 15:45:39,779 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:45:39,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:39,780 INFO L85 PathProgramCache]: Analyzing trace with hash -23153059, now seen corresponding path program 2 times [2022-11-25 15:45:39,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:39,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558035177] [2022-11-25 15:45:39,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:39,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:39,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:39,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558035177] [2022-11-25 15:45:39,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558035177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:45:39,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:45:39,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 15:45:39,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743622183] [2022-11-25 15:45:39,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:45:39,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:45:39,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:39,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:45:39,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:45:40,121 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 235 [2022-11-25 15:45:40,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 645 transitions, 14832 flow. Second operand has 7 states, 7 states have (on average 100.85714285714286) internal successors, (706), 7 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:40,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:45:40,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 235 [2022-11-25 15:45:40,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:45:43,655 INFO L130 PetriNetUnfolder]: 4753/7764 cut-off events. [2022-11-25 15:45:43,655 INFO L131 PetriNetUnfolder]: For 205326/205326 co-relation queries the response was YES. [2022-11-25 15:45:43,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68641 conditions, 7764 events. 4753/7764 cut-off events. For 205326/205326 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 50235 event pairs, 1008 based on Foata normal form. 28/7786 useless extension candidates. Maximal degree in co-relation 68558. Up to 5080 conditions per place. [2022-11-25 15:45:43,783 INFO L137 encePairwiseOnDemand]: 227/235 looper letters, 617 selfloop transitions, 102 changer transitions 8/727 dead transitions. [2022-11-25 15:45:43,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 727 transitions, 17218 flow [2022-11-25 15:45:43,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:45:43,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:45:43,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 762 transitions. [2022-11-25 15:45:43,789 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46322188449848023 [2022-11-25 15:45:43,789 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 762 transitions. [2022-11-25 15:45:43,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 762 transitions. [2022-11-25 15:45:43,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:45:43,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 762 transitions. [2022-11-25 15:45:43,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 108.85714285714286) internal successors, (762), 7 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:43,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:43,794 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:43,795 INFO L175 Difference]: Start difference. First operand has 205 places, 645 transitions, 14832 flow. Second operand 7 states and 762 transitions. [2022-11-25 15:45:43,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 727 transitions, 17218 flow [2022-11-25 15:45:44,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 727 transitions, 17083 flow, removed 30 selfloop flow, removed 1 redundant places. [2022-11-25 15:45:44,975 INFO L231 Difference]: Finished difference. Result has 213 places, 655 transitions, 15162 flow [2022-11-25 15:45:44,976 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=14665, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15162, PETRI_PLACES=213, PETRI_TRANSITIONS=655} [2022-11-25 15:45:44,976 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2022-11-25 15:45:44,977 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 655 transitions, 15162 flow [2022-11-25 15:45:44,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 100.85714285714286) internal successors, (706), 7 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:44,977 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:45:44,978 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:44,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-25 15:45:44,978 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:45:44,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:44,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1171195109, now seen corresponding path program 3 times [2022-11-25 15:45:44,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:44,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652483506] [2022-11-25 15:45:44,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:44,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:45,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:45,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:45,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:45,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652483506] [2022-11-25 15:45:45,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652483506] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:45:45,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528778800] [2022-11-25 15:45:45,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:45:45,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:45,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:45:45,229 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:45:45,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 15:45:45,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 15:45:45,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:45:45,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:45:45,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:45:45,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:45,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:45:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:46,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528778800] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:45:46,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:45:46,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2022-11-25 15:45:46,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089305027] [2022-11-25 15:45:46,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:45:46,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 15:45:46,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:46,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 15:45:46,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:45:46,631 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 235 [2022-11-25 15:45:46,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 655 transitions, 15162 flow. Second operand has 15 states, 15 states have (on average 98.4) internal successors, (1476), 15 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:46,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:45:46,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 235 [2022-11-25 15:45:46,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:45:52,720 INFO L130 PetriNetUnfolder]: 6726/11058 cut-off events. [2022-11-25 15:45:52,720 INFO L131 PetriNetUnfolder]: For 298665/298665 co-relation queries the response was YES. [2022-11-25 15:45:52,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99211 conditions, 11058 events. 6726/11058 cut-off events. For 298665/298665 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 76812 event pairs, 1061 based on Foata normal form. 46/11098 useless extension candidates. Maximal degree in co-relation 99124. Up to 4740 conditions per place. [2022-11-25 15:45:52,930 INFO L137 encePairwiseOnDemand]: 226/235 looper letters, 917 selfloop transitions, 183 changer transitions 2/1102 dead transitions. [2022-11-25 15:45:52,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 1102 transitions, 25601 flow [2022-11-25 15:45:52,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 15:45:52,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 15:45:52,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1915 transitions. [2022-11-25 15:45:52,935 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45271867612293143 [2022-11-25 15:45:52,935 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1915 transitions. [2022-11-25 15:45:52,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1915 transitions. [2022-11-25 15:45:52,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:45:52,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1915 transitions. [2022-11-25 15:45:52,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 106.38888888888889) internal successors, (1915), 18 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:52,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 235.0) internal successors, (4465), 19 states have internal predecessors, (4465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:52,946 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 235.0) internal successors, (4465), 19 states have internal predecessors, (4465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:52,947 INFO L175 Difference]: Start difference. First operand has 213 places, 655 transitions, 15162 flow. Second operand 18 states and 1915 transitions. [2022-11-25 15:45:52,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 1102 transitions, 25601 flow [2022-11-25 15:45:54,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 1102 transitions, 25421 flow, removed 10 selfloop flow, removed 3 redundant places. [2022-11-25 15:45:54,747 INFO L231 Difference]: Finished difference. Result has 238 places, 718 transitions, 17124 flow [2022-11-25 15:45:54,748 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=14988, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=17124, PETRI_PLACES=238, PETRI_TRANSITIONS=718} [2022-11-25 15:45:54,749 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2022-11-25 15:45:54,749 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 718 transitions, 17124 flow [2022-11-25 15:45:54,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 98.4) internal successors, (1476), 15 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:54,750 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:45:54,750 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:54,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-25 15:45:54,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 15:45:54,952 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:45:54,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:54,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1601374655, now seen corresponding path program 4 times [2022-11-25 15:45:54,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:54,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252814326] [2022-11-25 15:45:54,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:54,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:55,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:55,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:55,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252814326] [2022-11-25 15:45:55,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252814326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:45:55,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990520611] [2022-11-25 15:45:55,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:45:55,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:55,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:45:55,230 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:45:55,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 15:45:55,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:45:55,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:45:55,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 15:45:55,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:45:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:55,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:45:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:55,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990520611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:45:55,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:45:55,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-25 15:45:55,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022973484] [2022-11-25 15:45:55,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:45:55,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:45:55,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:55,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:45:55,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:45:55,972 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 235 [2022-11-25 15:45:55,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 718 transitions, 17124 flow. Second operand has 12 states, 12 states have (on average 99.83333333333333) internal successors, (1198), 12 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:55,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:45:55,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 235 [2022-11-25 15:45:55,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:46:01,096 INFO L130 PetriNetUnfolder]: 6714/11034 cut-off events. [2022-11-25 15:46:01,096 INFO L131 PetriNetUnfolder]: For 336217/336217 co-relation queries the response was YES. [2022-11-25 15:46:01,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104426 conditions, 11034 events. 6714/11034 cut-off events. For 336217/336217 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 76303 event pairs, 1732 based on Foata normal form. 10/11038 useless extension candidates. Maximal degree in co-relation 104328. Up to 8208 conditions per place. [2022-11-25 15:46:01,353 INFO L137 encePairwiseOnDemand]: 227/235 looper letters, 667 selfloop transitions, 114 changer transitions 2/783 dead transitions. [2022-11-25 15:46:01,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 783 transitions, 19364 flow [2022-11-25 15:46:01,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:46:01,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:46:01,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 757 transitions. [2022-11-25 15:46:01,361 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4601823708206687 [2022-11-25 15:46:01,361 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 757 transitions. [2022-11-25 15:46:01,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 757 transitions. [2022-11-25 15:46:01,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:46:01,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 757 transitions. [2022-11-25 15:46:01,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 108.14285714285714) internal successors, (757), 7 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:01,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:01,370 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:01,370 INFO L175 Difference]: Start difference. First operand has 238 places, 718 transitions, 17124 flow. Second operand 7 states and 757 transitions. [2022-11-25 15:46:01,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 783 transitions, 19364 flow [2022-11-25 15:46:03,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 783 transitions, 19072 flow, removed 90 selfloop flow, removed 2 redundant places. [2022-11-25 15:46:03,203 INFO L231 Difference]: Finished difference. Result has 244 places, 719 transitions, 17118 flow [2022-11-25 15:46:03,204 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=16836, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17118, PETRI_PLACES=244, PETRI_TRANSITIONS=719} [2022-11-25 15:46:03,204 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2022-11-25 15:46:03,204 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 719 transitions, 17118 flow [2022-11-25 15:46:03,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 99.83333333333333) internal successors, (1198), 12 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:03,205 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:46:03,205 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:46:03,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 15:46:03,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 15:46:03,412 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:46:03,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:46:03,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1929951000, now seen corresponding path program 11 times [2022-11-25 15:46:03,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:46:03,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068118125] [2022-11-25 15:46:03,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:46:03,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:46:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:46:03,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:46:03,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068118125] [2022-11-25 15:46:03,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068118125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:46:03,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409986650] [2022-11-25 15:46:03,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:46:03,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:46:03,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:46:03,611 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:46:03,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 15:46:03,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:46:03,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:46:03,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:46:03,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:46:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:46:04,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:46:04,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:46:04,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409986650] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 15:46:04,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:46:04,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2022-11-25 15:46:04,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779253224] [2022-11-25 15:46:04,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:46:04,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:46:04,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:46:04,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:46:04,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:46:04,482 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 235 [2022-11-25 15:46:04,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 719 transitions, 17118 flow. Second operand has 6 states, 6 states have (on average 103.16666666666667) internal successors, (619), 6 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:04,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:46:04,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 235 [2022-11-25 15:46:04,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:46:08,982 INFO L130 PetriNetUnfolder]: 6625/10884 cut-off events. [2022-11-25 15:46:08,982 INFO L131 PetriNetUnfolder]: For 312616/312653 co-relation queries the response was YES. [2022-11-25 15:46:09,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101440 conditions, 10884 events. 6625/10884 cut-off events. For 312616/312653 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 75227 event pairs, 1196 based on Foata normal form. 36/10885 useless extension candidates. Maximal degree in co-relation 101340. Up to 5810 conditions per place. [2022-11-25 15:46:09,242 INFO L137 encePairwiseOnDemand]: 228/235 looper letters, 591 selfloop transitions, 191 changer transitions 1/801 dead transitions. [2022-11-25 15:46:09,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 801 transitions, 19772 flow [2022-11-25 15:46:09,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:46:09,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:46:09,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 672 transitions. [2022-11-25 15:46:09,245 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4765957446808511 [2022-11-25 15:46:09,245 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 672 transitions. [2022-11-25 15:46:09,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 672 transitions. [2022-11-25 15:46:09,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:46:09,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 672 transitions. [2022-11-25 15:46:09,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:09,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 235.0) internal successors, (1645), 7 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:09,251 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 235.0) internal successors, (1645), 7 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:09,251 INFO L175 Difference]: Start difference. First operand has 244 places, 719 transitions, 17118 flow. Second operand 6 states and 672 transitions. [2022-11-25 15:46:09,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 801 transitions, 19772 flow [2022-11-25 15:46:11,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 801 transitions, 19570 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-11-25 15:46:11,181 INFO L231 Difference]: Finished difference. Result has 246 places, 720 transitions, 17369 flow [2022-11-25 15:46:11,182 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=16916, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=17369, PETRI_PLACES=246, PETRI_TRANSITIONS=720} [2022-11-25 15:46:11,182 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2022-11-25 15:46:11,183 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 720 transitions, 17369 flow [2022-11-25 15:46:11,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 103.16666666666667) internal successors, (619), 6 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:11,183 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:46:11,183 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:46:11,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 15:46:11,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 15:46:11,390 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:46:11,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:46:11,391 INFO L85 PathProgramCache]: Analyzing trace with hash 276694268, now seen corresponding path program 12 times [2022-11-25 15:46:11,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:46:11,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375246184] [2022-11-25 15:46:11,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:46:11,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:46:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:46:11,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:46:11,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375246184] [2022-11-25 15:46:11,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375246184] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:46:11,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355216753] [2022-11-25 15:46:11,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:46:11,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:46:11,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:46:11,690 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:46:11,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 15:46:11,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 15:46:11,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:46:11,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:46:11,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:46:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:46:12,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:46:20,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:46:20,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355216753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:46:20,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:46:20,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2022-11-25 15:46:20,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569251530] [2022-11-25 15:46:20,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:46:20,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 15:46:20,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:46:20,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 15:46:20,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=157, Unknown=4, NotChecked=0, Total=210 [2022-11-25 15:46:20,819 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 235 [2022-11-25 15:46:20,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 720 transitions, 17369 flow. Second operand has 15 states, 15 states have (on average 98.73333333333333) internal successors, (1481), 15 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:20,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:46:20,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 235 [2022-11-25 15:46:20,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:46:22,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:46:25,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:46:27,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:46:29,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:46:31,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:46:33,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:46:35,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:46:37,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:46:53,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:46:55,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:46:59,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:47:01,479 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_thread2Thread1of1ForFork0_~i~1 4294967296))) (and (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse0 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse0) (let ((.cse2 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ .cse1 (* (div .cse2 4294967296) 4294967296)) .cse2)) (< .cse0 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))) (let ((.cse3 (* 4294967295 c_~a~0))) (< (+ .cse1 (* (div .cse3 4294967296) 4294967296)) .cse3)))) is different from false [2022-11-25 15:47:03,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:47:05,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:47:08,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:47:10,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:47:22,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:47:24,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:47:31,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:47:33,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:47:35,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:47:37,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:47:39,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:47:41,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:47:43,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:47:45,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:47:46,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:47:49,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:47:51,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:47:53,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:48:00,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:48:07,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:48:09,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:48:11,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:48:13,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:48:15,649 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (.cse1 (mod c_thread2Thread1of1ForFork0_~i~1 4294967296))) (and (or (< .cse0 (mod c_~a~0 4294967296)) (let ((.cse2 (* 4294967295 c_~a~0))) (< (+ .cse1 (* (div .cse2 4294967296) 4294967296)) .cse2))) (<= (div (+ c_~b~0 c_~a~0) 4294967296) (div (+ (- 1) c_~b~0 c_~a~0) 4294967296)) (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse3 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 .cse0) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse3) (let ((.cse4 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ .cse1 (* (div .cse4 4294967296) 4294967296)) .cse4)) (< .cse3 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))))) is different from false [2022-11-25 15:48:17,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:48:19,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:48:24,868 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_thread2Thread1of1ForFork0_~i~1 4294967296))) (and (<= (div (+ c_~b~0 c_~a~0) 4294967296) (div (+ (- 1) c_~b~0 c_~a~0) 4294967296)) (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse0 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse0) (let ((.cse2 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ .cse1 (* (div .cse2 4294967296) 4294967296)) .cse2)) (< .cse0 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))) (let ((.cse3 (* 4294967295 c_~a~0))) (< (+ .cse1 (* (div .cse3 4294967296) 4294967296)) .cse3)))) is different from false [2022-11-25 15:48:32,357 INFO L130 PetriNetUnfolder]: 11155/18368 cut-off events. [2022-11-25 15:48:32,357 INFO L131 PetriNetUnfolder]: For 523457/523457 co-relation queries the response was YES. [2022-11-25 15:48:32,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169513 conditions, 18368 events. 11155/18368 cut-off events. For 523457/523457 co-relation queries the response was YES. Maximal size of possible extension queue 1159. Compared 138101 event pairs, 1484 based on Foata normal form. 108/18464 useless extension candidates. Maximal degree in co-relation 169413. Up to 8275 conditions per place. [2022-11-25 15:48:32,865 INFO L137 encePairwiseOnDemand]: 221/235 looper letters, 780 selfloop transitions, 876 changer transitions 1/1657 dead transitions. [2022-11-25 15:48:32,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 1657 transitions, 37949 flow [2022-11-25 15:48:32,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-25 15:48:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-25 15:48:32,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3546 transitions. [2022-11-25 15:48:32,873 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45725338491295936 [2022-11-25 15:48:32,873 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3546 transitions. [2022-11-25 15:48:32,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3546 transitions. [2022-11-25 15:48:32,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:48:32,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3546 transitions. [2022-11-25 15:48:32,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 107.45454545454545) internal successors, (3546), 33 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:32,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 235.0) internal successors, (7990), 34 states have internal predecessors, (7990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:32,892 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 235.0) internal successors, (7990), 34 states have internal predecessors, (7990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:32,893 INFO L175 Difference]: Start difference. First operand has 246 places, 720 transitions, 17369 flow. Second operand 33 states and 3546 transitions. [2022-11-25 15:48:32,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 1657 transitions, 37949 flow [2022-11-25 15:48:36,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 1657 transitions, 37120 flow, removed 61 selfloop flow, removed 6 redundant places. [2022-11-25 15:48:37,009 INFO L231 Difference]: Finished difference. Result has 296 places, 1222 transitions, 32270 flow [2022-11-25 15:48:37,010 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=16917, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=466, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=32270, PETRI_PLACES=296, PETRI_TRANSITIONS=1222} [2022-11-25 15:48:37,011 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2022-11-25 15:48:37,011 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 1222 transitions, 32270 flow [2022-11-25 15:48:37,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 98.73333333333333) internal successors, (1481), 15 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:37,012 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:37,012 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:48:37,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 15:48:37,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:48:37,219 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:48:37,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:37,219 INFO L85 PathProgramCache]: Analyzing trace with hash 669574813, now seen corresponding path program 5 times [2022-11-25 15:48:37,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:48:37,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823590867] [2022-11-25 15:48:37,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:37,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:48:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:37,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:48:37,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:48:37,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823590867] [2022-11-25 15:48:37,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823590867] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:48:37,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027198703] [2022-11-25 15:48:37,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:48:37,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:48:37,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:48:37,447 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:48:37,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 15:48:37,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:48:37,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:48:37,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 15:48:37,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:48:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:48:37,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:48:39,924 WARN L837 $PredicateComparison]: unable to prove that (forall ((aux_mod_~b~0_21 Int)) (or (let ((.cse0 (* 4294967295 aux_mod_~b~0_21))) (< (+ (mod c_thread1Thread1of1ForFork1_~i~0 4294967296) (* (div .cse0 4294967296) 4294967296)) .cse0)) (<= aux_mod_~b~0_21 (mod c_thread2Thread1of1ForFork0_~i~1 4294967296)) (>= aux_mod_~b~0_21 4294967296))) is different from false [2022-11-25 15:48:40,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-25 15:48:40,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027198703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:48:40,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:48:40,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-25 15:48:40,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063691318] [2022-11-25 15:48:40,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:48:40,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 15:48:40,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:48:40,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 15:48:40,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=97, Unknown=1, NotChecked=20, Total=156 [2022-11-25 15:48:40,086 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 235 [2022-11-25 15:48:40,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 1222 transitions, 32270 flow. Second operand has 13 states, 13 states have (on average 95.23076923076923) internal successors, (1238), 13 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:40,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:48:40,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 235 [2022-11-25 15:48:40,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:48:53,710 INFO L130 PetriNetUnfolder]: 11639/19140 cut-off events. [2022-11-25 15:48:53,710 INFO L131 PetriNetUnfolder]: For 759787/759787 co-relation queries the response was YES. [2022-11-25 15:48:54,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207394 conditions, 19140 events. 11639/19140 cut-off events. For 759787/759787 co-relation queries the response was YES. Maximal size of possible extension queue 1211. Compared 144470 event pairs, 2991 based on Foata normal form. 30/19166 useless extension candidates. Maximal degree in co-relation 207272. Up to 14772 conditions per place. [2022-11-25 15:48:54,404 INFO L137 encePairwiseOnDemand]: 227/235 looper letters, 1154 selfloop transitions, 183 changer transitions 0/1337 dead transitions. [2022-11-25 15:48:54,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 1337 transitions, 36632 flow [2022-11-25 15:48:54,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:48:54,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:48:54,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 748 transitions. [2022-11-25 15:48:54,406 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4547112462006079 [2022-11-25 15:48:54,406 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 748 transitions. [2022-11-25 15:48:54,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 748 transitions. [2022-11-25 15:48:54,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:48:54,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 748 transitions. [2022-11-25 15:48:54,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 106.85714285714286) internal successors, (748), 7 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:54,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:54,411 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:54,411 INFO L175 Difference]: Start difference. First operand has 296 places, 1222 transitions, 32270 flow. Second operand 7 states and 748 transitions. [2022-11-25 15:48:54,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 1337 transitions, 36632 flow [2022-11-25 15:49:03,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 1337 transitions, 35239 flow, removed 492 selfloop flow, removed 4 redundant places. [2022-11-25 15:49:03,259 INFO L231 Difference]: Finished difference. Result has 302 places, 1252 transitions, 32097 flow [2022-11-25 15:49:03,260 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=30913, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1051, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=32097, PETRI_PLACES=302, PETRI_TRANSITIONS=1252} [2022-11-25 15:49:03,261 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2022-11-25 15:49:03,261 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 1252 transitions, 32097 flow [2022-11-25 15:49:03,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 95.23076923076923) internal successors, (1238), 13 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:49:03,262 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:49:03,262 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:03,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:03,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:49:03,462 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 15:49:03,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:03,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1937717863, now seen corresponding path program 6 times [2022-11-25 15:49:03,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:03,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389600493] [2022-11-25 15:49:03,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:03,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:03,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:49:03,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:49:03,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389600493] [2022-11-25 15:49:03,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389600493] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:49:03,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567238805] [2022-11-25 15:49:03,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:49:03,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:49:03,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:03,687 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:49:03,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4830e00b-cc6f-4c19-a39a-eabae00c9d17/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 15:49:03,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 15:49:03,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:49:03,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:49:03,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:04,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:49:04,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:49:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:49:04,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567238805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:49:04,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:49:04,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2022-11-25 15:49:04,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868319562] [2022-11-25 15:49:04,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:49:04,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 15:49:04,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:49:04,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 15:49:04,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-11-25 15:49:04,704 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 235 [2022-11-25 15:49:04,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 1252 transitions, 32097 flow. Second operand has 16 states, 16 states have (on average 98.25) internal successors, (1572), 16 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:49:04,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:49:04,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 235 [2022-11-25 15:49:04,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:49:20,986 INFO L130 PetriNetUnfolder]: 12624/20960 cut-off events. [2022-11-25 15:49:20,986 INFO L131 PetriNetUnfolder]: For 782353/782353 co-relation queries the response was YES. [2022-11-25 15:49:21,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221084 conditions, 20960 events. 12624/20960 cut-off events. For 782353/782353 co-relation queries the response was YES. Maximal size of possible extension queue 1314. Compared 163180 event pairs, 1642 based on Foata normal form. 87/21043 useless extension candidates. Maximal degree in co-relation 220958. Up to 9457 conditions per place. [2022-11-25 15:49:21,837 INFO L137 encePairwiseOnDemand]: 226/235 looper letters, 1068 selfloop transitions, 962 changer transitions 0/2030 dead transitions. [2022-11-25 15:49:21,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 2030 transitions, 50472 flow [2022-11-25 15:49:21,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-25 15:49:21,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-25 15:49:21,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3571 transitions. [2022-11-25 15:49:21,845 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46047711154094134 [2022-11-25 15:49:21,846 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3571 transitions. [2022-11-25 15:49:21,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3571 transitions. [2022-11-25 15:49:21,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:49:21,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3571 transitions. [2022-11-25 15:49:21,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 108.21212121212122) internal successors, (3571), 33 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:49:21,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 235.0) internal successors, (7990), 34 states have internal predecessors, (7990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:49:21,869 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 235.0) internal successors, (7990), 34 states have internal predecessors, (7990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:49:21,869 INFO L175 Difference]: Start difference. First operand has 302 places, 1252 transitions, 32097 flow. Second operand 33 states and 3571 transitions. [2022-11-25 15:49:21,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 2030 transitions, 50472 flow